Mercurial > hg > octave-nkf
annotate NEWS @ 14546:b8edefd8c111
NEWS: Expand section on nested functions and clarify regexprep changes.
* NEWS: Expand section on nested functions and clarify regexprep changes.
| author | Rik <octave@nomad.inbox5.com> |
|---|---|
| date | Tue, 10 Apr 2012 22:52:41 -0700 |
| parents | be18c9e359bf |
| children | 9546bb28648c |
| rev | line source |
|---|---|
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1 Summary of important user-visible changes for version 3.8: |
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2 --------------------------------------------------------- |
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3 |
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4 ** Octave now supports nested functions with scoping rules that are |
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5 compatible with Matlab. A nested function is one declared and defined |
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6 within the body of another function. The nested function is only |
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7 accessible from within the enclosing function which makes it one |
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8 method for making private functions whose names do not conflict with those |
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9 in the global namespace (See also subfunctions and private functions). |
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10 In addition, variables in the enclosing function are visible within the |
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11 nested function. This makes it possible to have a pseudo-global variable |
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12 which can be seen by a group of functions, but which is not visible in |
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13 the global namespace. |
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14 |
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15 Example: |
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16 function outerfunc (...) |
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17 ... |
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18 function nested1 (...) |
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19 ... |
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20 function nested2 (...) |
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21 ... |
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22 endfunction |
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23 endfunction |
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24 |
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25 function nested3 (...) |
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26 ... |
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27 endfunction |
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28 endfunction |
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29 |
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30 ** 'emptymatch', 'noemptymatch' options added to regular expressions. |
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31 |
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32 With this addition Octave now accepts the entire set of Matlab options |
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33 for regular expressions. 'noemptymatch' is the default, but 'emptymatch' |
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34 has certain uses where you need to match an assertion rather than actual |
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35 characters. For example, |
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36 |
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37 regexprep ('World', '^', 'Hello ', 'emptymatch') |
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38 => Hello World |
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39 |
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40 where the pattern is actually the assertion '^' or start-of-line. |
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41 |
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42 ** For compatibility with Matlab, the regexp, regexpi, and regexprep |
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43 functions now process backslash escapes in single-quoted pattern |
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44 strings. In addition, the regexprep function now processes backslash |
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45 escapes in single-quoted replacement strings. |
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46 |
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47 ** Redundant terminal comma accepted by parser |
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48 |
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49 A redundant terminal comma is now accepted in matrix |
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50 definitions which allows writing code such as |
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51 |
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52 [a,... |
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53 b,... |
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54 c,... |
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55 ] = deal (1,2,3) |
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56 |
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57 ** Warning IDs renamed: |
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58 |
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59 Octave:array-as-scalar => Octave:array-to-scalar |
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60 Octave:array-as-vector => Octave:array-to-vector |
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61 |
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62 ** Other new functions added in 3.8.0: |
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63 |
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64 colorcube splinefit |
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65 lines tetramesh |
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66 rgbplot |
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67 |
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68 ** Deprecated functions. |
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69 |
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70 The following functions were deprecated in Octave 3.4 and have been |
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71 removed from Octave 3.8. |
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72 |
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73 autocor dispatch is_global strerror |
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74 autocov fstat krylovb values |
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75 betai gammai perror |
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76 cellidx glpkmex replot |
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77 cquad is_duplicate_entry saveimage |
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78 |
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79 The following functions have been deprecated in Octave 3.8 and will |
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80 be removed from Octave 3.12 (or whatever version is the second major |
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81 release after 3.8): |
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82 |
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83 <none yet> |
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84 |
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85 The following keywords have been deprecated in Octave 3.8 and will |
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86 be removed from Octave 3.12 (or whatever version is the second major |
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87 release after 3.8): |
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88 |
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89 static |
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90 |
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91 |
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92 Summary of important user-visible changes for version 3.6: |
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93 --------------------------------------------------------- |
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94 |
| 14188 | 95 ** The PCRE library is now required to build Octave. If a pre-compiled |
| 96 package does not exist for your system, you can find PCRE sources | |
| 97 at http://www.pcre.org | |
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98 |
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99 ** The ARPACK library is no longer distributed with Octave. |
| 14188 | 100 If you need the eigs or svds functions you must provide an |
| 101 external ARPACK through a package manager or by compiling it | |
| 102 yourself. If a pre-compiled package does not exist for your system, | |
| 103 you can find the current ARPACK sources at | |
| 104 http://forge.scilab.org/index.php/p/arpack-ng | |
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105 |
| 14082 | 106 ** Many of Octave's binary operators (.*, .^, +, -, ...) now perform |
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107 automatic broadcasting for array operations which allows you to use |
| 14082 | 108 operator notation instead of calling bsxfun or expanding arrays (and |
| 109 unnecessarily wasting memory) with repmat or similar idioms. For | |
| 110 example, to scale the columns of a matrix by the elements of a row | |
| 111 vector, you may now write | |
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112 |
| 14082 | 113 rv .* M |
| 114 | |
| 115 In this expression, the number of elements of rv must match the | |
| 116 number of columns of M. The following operators are affected: | |
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117 |
| 14082 | 118 plus + .+ |
| 119 minus - .- | |
| 120 times .* | |
| 121 rdivide ./ | |
| 122 ldivide .\ | |
| 123 power .^ .** | |
| 124 lt < | |
| 125 le <= | |
| 126 eq == | |
| 127 gt > | |
| 128 ge >= | |
| 129 ne != ~= | |
| 130 and & | |
| 131 or | | |
| 132 atan2 | |
| 133 hypot | |
| 134 max | |
| 135 min | |
| 136 mod | |
| 137 rem | |
| 138 xor | |
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139 |
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140 additionally, since the A op= B assignment operators are equivalent |
| 14082 | 141 to A = A op B, the following operators are also affected: |
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142 |
| 14082 | 143 += -= .+= .-= .*= ./= .\= .^= .**= &= |= |
| 144 | |
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145 See the "Broadcasting" section in the new "Vectorization and Faster |
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146 Code Execution" chapter of the manual for more details. |
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147 |
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148 ** Octave now features a profiler, thanks to the work of Daniel Kraft |
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149 under the Google Summer of Code mentorship program. The manual has |
| 13262 | 150 been updated to reflect this addition. The new user-visible |
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151 functions are profile, profshow, and profexplore. |
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152 |
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153 ** Overhaul of statistical distribution functions |
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154 |
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155 Functions now return "single" outputs for inputs of class "single". |
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156 |
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157 75% reduction in memory usage through use of logical indexing. |
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158 |
| 14188 | 159 Random sample functions now use the same syntax as rand and accept |
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160 a comma separated list of dimensions or a dimension vector. |
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161 |
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162 Functions have been made Matlab-compatible with regard to special |
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163 cases (probability on boundaries, probabilities for values outside |
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164 distribution, etc.). This may cause subtle changes to existing |
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165 scripts. |
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166 |
| 14188 | 167 negative binomial function has been extended to real, non-integer |
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168 inputs. The discrete_inv function now returns v(1) for 0 instead of |
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169 NaN. The nbincdf function has been recoded to use a closed form |
| 14188 | 170 solution with betainc. |
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171 |
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172 ** strread, textscan, and textread have been completely revamped. |
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173 |
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174 They now support nearly all Matlab functionality including: |
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175 |
| 14082 | 176 * Matlab-compatible whitespace and delimiter defaults |
| 177 | |
| 178 * Matlab-compatible options: 'whitespace', treatasempty', format | |
| 179 string repeat count, user-specified comment style, uneven-length | |
| 180 output arrays, %n and %u conversion specifiers (provisionally) | |
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181 |
| 14082 | 182 ** All .m string functions have been modified for better performance or |
| 183 greater Matlab compatibility. Performance gains of 15X-30X have | |
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184 been demonstrated. Operations on cell array of strings no longer pay |
| 14082 | 185 quite as high a penalty as those on 2-D character arrays. |
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186 |
| 14082 | 187 deblank: Now requires character or cellstr input. |
| 188 | |
| 189 strtrim: Now requires character or cellstr input. | |
| 190 No longer trims nulls ("\0") from string for Matlab | |
| 191 compatibility. | |
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192 |
| 14082 | 193 strmatch: Follows documentation precisely and ignores trailing spaces |
| 194 in pattern and in string. Note that this is documented | |
| 195 Matlab behavior but the implementation apparently does | |
| 196 not always follow it. | |
| 197 | |
| 198 substr: Now possible to specify a negative LEN option which | |
| 199 extracts to within LEN of the end of the string. | |
| 200 | |
| 201 strtok: Now accepts cellstr input. | |
| 202 | |
| 203 base2dec, bin2dec, hex2dec: | |
| 204 Now accept cellstr inputs. | |
| 205 | |
| 206 dec2base, dec2bin, dec2hex: | |
| 207 Now accept cellstr inputs. | |
| 208 | |
| 209 index, rindex: | |
| 210 Now accept 2-D character array input. | |
| 211 | |
| 212 strsplit: Now accepts 2-D character array input. | |
| 13262 | 213 |
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214 ** Geometry functions derived from Qhull (convhull, delaunay, voronoi) |
| 14082 | 215 have been revamped. The options passed to the underlying qhull |
| 216 command have been changed for better results or for Matlab | |
| 217 compatibility. | |
| 218 | |
| 219 convhull: Default options are "Qt" for 2D, 3D, 4D inputs | |
| 220 Default options are "Qt Qx" for 5D and higher | |
| 221 | |
| 222 delaunay: Default options are "Qt Qbb Qc Qz" for 2D and 3D inputs | |
| 223 Default options are "Qt Qbb Qc Qx" for 4D and higher | |
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224 |
| 14082 | 225 voronoi: No default arguments |
| 226 | |
| 227 ** Date/Time functions updated. Millisecond support with FFF format | |
| 228 string now supported. | |
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229 |
| 14082 | 230 datestr: Numerical formats 21, 22, 29 changed to match Matlab. |
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231 Now accepts cellstr input. |
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232 |
| 14082 | 233 ** The following warning IDs have been removed: |
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234 |
| 14082 | 235 Octave:associativity-change |
| 236 Octave:complex-cmp-ops | |
| 237 Octave:empty-list-elements | |
| 238 Octave:fortran-indexing | |
| 239 Octave:precedence-change | |
| 240 | |
| 241 ** The warning ID Octave:string-concat has been renamed to | |
| 242 Octave:mixed-string-concat. | |
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243 |
| 14082 | 244 ** Octave now includes the following Matlab-compatible preference |
| 245 functions: | |
| 13262 | 246 |
| 14082 | 247 addpref getpref ispref rmpref setpref |
| 13262 | 248 |
| 14082 | 249 ** The following Matlab-compatible handle graphics functions have been |
| 250 added: | |
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251 |
| 14082 | 252 guidata uipanel uitoolbar |
| 253 guihandles uipushtool uiwait | |
| 254 uicontextmenu uiresume waitfor | |
| 255 uicontrol uitoggletool | |
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256 |
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257 The uiXXX functions above are experimental. |
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258 |
| 14082 | 259 Except for uiwait and uiresume, the uiXXX functions are not |
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260 supported with the FLTK+OpenGL graphics toolkit. |
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261 |
| 14082 | 262 The gnuplot graphics toolkit does not support any of the uiXXX |
| 263 functions nor the waitfor function. | |
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264 |
| 14082 | 265 ** New keyword parfor (parallel for loop) is now recognized as a valid |
| 266 keyword. Implementation, however, is still mapped to an ordinary | |
| 267 for loop. | |
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268 |
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269 ** Other new functions added in 3.6.0: |
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270 |
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271 bicg nthargout usejava |
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272 is_dq_string narginchk waitbar |
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273 is_sq_string python zscore |
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274 is_function_handle register_graphics_toolkit |
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275 loaded_graphics_toolkits recycle |
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276 |
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277 ** Deprecated functions. |
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278 |
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279 The following functions were deprecated in Octave 3.2 and have been |
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280 removed from Octave 3.6. |
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281 |
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282 create_set spcholinv splu |
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283 dmult spcumprod spmax |
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284 iscommand spcumsum spmin |
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285 israwcommand spdet spprod |
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286 lchol spdiag spqr |
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287 loadimage spfind spsum |
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288 mark_as_command sphcat spsumsq |
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289 mark_as_rawcommand spinv spvcat |
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290 spatan2 spkron str2mat |
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291 spchol splchol unmark_command |
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292 spchol2inv split unmark_rawcommand |
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293 |
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294 The following functions have been deprecated in Octave 3.6 and will |
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295 be removed from Octave 3.10 (or whatever version is the second major |
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296 release after 3.6): |
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297 |
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298 cut is_duplicate_entry |
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299 cor polyderiv |
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300 corrcoef shell_cmd |
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301 __error_text__ studentize |
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302 error_text sylvester_matrix |
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303 |
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304 ** The following functions have been modified for Matlab compatibility: |
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305 |
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306 randperm |
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307 |
| 13251 | 308 Summary of important user-visible changes for version 3.4.3: |
| 309 ----------------------------------------------------------- | |
| 310 | |
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311 ** Octave 3.4.3 is a bug fixing release. |
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312 |
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313 Summary of important user-visible changes for version 3.4.2: |
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314 ----------------------------------------------------------- |
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315 |
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316 ** Octave 3.4.2 fixes some minor installation problems that affected |
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317 version 3.4.1. |
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318 |
| 12709 | 319 Summary of important user-visible changes for version 3.4.1: |
| 320 ----------------------------------------------------------- | |
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321 |
| 12709 | 322 ** Octave 3.4.1 is primarily a bug fixing release. |
| 323 | |
| 324 ** IMPORTANT note about binary incompatibility in this release: | |
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325 |
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326 Binary compatibility for all 3.4.x releases was originally planned, |
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327 but this is impossible for the 3.4.1 release due to a bug in the way |
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328 shared libraries were built in Octave 3.4.0. Because of this bug, |
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329 .oct files built for Octave 3.4.0 must be recompiled before they |
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330 will work with Octave 3.4.1. |
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331 |
| 12709 | 332 Given that there would be binary incompatibilities with shared |
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333 libraries going from Octave 3.4.0 to 3.4.1, the following |
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334 incompatible changes were also made in this release: |
| 12709 | 335 |
| 336 * The Perl Compatible Regular Expression (PCRE) library is now | |
| 337 required to build Octave. | |
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338 |
| 12712 | 339 * Octave's libraries and .oct files are now installed in |
| 340 subdirectories of $libdir instead of $libexecdir. | |
| 341 | |
| 12709 | 342 Any future Octave 3.4.x release versions should remain binary |
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343 compatible with Octave 3.4.1 as proper library versioning is now |
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344 being used as recommended by the libtool manual. |
| 12709 | 345 |
| 346 ** The following functions have been deprecated in Octave 3.4.1 and will | |
| 347 be removed from Octave 3.8 (or whatever version is the second major | |
| 348 release after 3.4): | |
| 349 | |
| 350 cquad is_duplicate_entry perror strerror | |
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351 |
| 12709 | 352 ** The following functions are new in 3.4.1: |
| 353 | |
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354 colstyle gmres iscolumn isrow mgorth nproc rectangle |
| 12709 | 355 |
| 356 ** The get_forge_pkg function is now private. | |
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357 |
| 12709 | 358 ** The rectangle_lw, rectangle_sw, triangle_lw, and triangle_sw |
| 359 functions are now private. | |
| 360 | |
| 361 ** The logistic_regression_derivatives and logistic_regression_likelihood | |
| 362 functions are now private. | |
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363 |
| 12739 | 364 ** ChangeLog files in the Octave sources are no longer maintained |
| 365 by hand. Instead, there is a single ChangeLog file generated from | |
| 366 the Mercurial version control commit messages. Older ChangeLog | |
| 367 information can be found in the etc/OLD-ChangeLogs directory in the | |
| 368 source distribution. | |
| 369 | |
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370 Summary of important user-visible changes for version 3.4: |
| 9352 | 371 --------------------------------------------------------- |
| 372 | |
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373 ** BLAS and LAPACK libraries are now required to build Octave. The |
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374 subset of the reference BLAS and LAPACK libraries has been removed |
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375 from the Octave sources. |
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376 |
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377 ** The ARPACK library is now distributed with Octave so it no longer |
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378 needs to be available as an external dependency when building |
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379 Octave. |
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380 |
| 10118 | 381 ** The `lookup' function was extended to be more useful for |
| 382 general-purpose binary searching. Using this improvement, the | |
| 383 ismember function was rewritten for significantly better | |
| 384 performance. | |
| 9352 | 385 |
| 386 ** Real, integer and logical matrices, when used in indexing, will now | |
| 387 cache the internal index_vector value (zero-based indices) when | |
| 388 successfully used as indices, eliminating the conversion penalty for | |
| 10118 | 389 subsequent indexing by the same matrix. In particular, this means it |
| 390 is no longer needed to avoid repeated indexing by logical arrays | |
| 391 using find for performance reasons. | |
| 9888 | 392 |
| 10118 | 393 ** Logical matrices are now treated more efficiently when used as |
| 394 indices. Octave will keep the index as a logical mask unless the | |
| 395 ratio of true elements is small enough, using a specialized | |
| 396 code. Previously, all logical matrices were always first converted | |
| 397 to index vectors. This results in savings in both memory and | |
| 398 computing time. | |
| 9480 | 399 |
| 10118 | 400 ** The `sub2ind' and `ind2sub' functions were reimplemented as compiled |
| 401 functions for better performance. These functions are now faster, | |
| 402 can deliver more economized results for ranges, and can reuse the | |
| 403 index cache mechanism described in previous paragraph. | |
| 404 | |
| 405 ** The built-in function equivalents to associative operators (`plus', | |
| 406 `times', `mtimes', `and', and `or') have been extended to accept | |
| 407 multiple arguments. This is especially useful for summing | |
| 408 (multiplying, etc.) lists of objects (of possibly distinct types): | |
| 9408 | 409 |
| 9449 | 410 matrix_sum = plus (matrix_list{:}); |
| 411 | |
| 10118 | 412 ** An FTP object type based on libcurl has been implemented. These |
| 413 objects allow ftp connections, downloads and uploads to be | |
| 414 managed. For example, | |
| 9880 | 415 |
| 10118 | 416 fp = ftp ("ftp.octave.org); |
| 417 cd (fp, "gnu/octave"); | |
| 418 mget (fp, "octave-3.2.3.tar.bz2"); | |
| 419 close (fp); | |
| 9880 | 420 |
| 10118 | 421 ** The default behavior of `assert (observed, expected)' has been |
| 422 relaxed to employ less strict checking that does not require the | |
| 423 internals of the values to match. This avoids previously valid | |
| 424 tests from breaking due to new internal classes introduced in future | |
| 425 Octave versions. | |
| 9449 | 426 |
| 427 For instance, all of these assertions were true in Octave 3.0.x | |
| 428 but false in 3.2.x due to new optimizations and improvements: | |
| 429 | |
| 430 assert (2*linspace (1, 5, 5), 2*(1:5)) | |
| 431 assert (zeros (0, 0), []) | |
| 432 assert (2*ones (1, 5), (2) (ones (1,5))) | |
| 9462 | 433 |
| 10118 | 434 ** The behavior of library functions `ismatrix', `issquare', and |
| 435 `issymmetric' has been changed for better consistency. | |
| 9873 | 436 |
| 10292 | 437 * The `ismatrix' function now returns true for all numeric, |
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438 logical and character 2-D or N-D matrices. Previously, `ismatrix' |
| 10292 | 439 returned false if the first or second dimension was zero. |
| 440 Hence, `ismatrix ([])' was false, | |
| 441 while `ismatrix (zeros (1,2,0))' was true. | |
| 9873 | 442 |
| 10118 | 443 * The `issquare' function now returns a logical scalar, and is |
| 444 equivalent to the expression | |
| 445 | |
| 446 ismatrix (x) && ndims (x) == 2 && rows (x) == columns (x) | |
| 447 | |
| 448 The dimension is no longer returned. As a result, `issquare ([])' | |
| 449 now yields true. | |
| 9873 | 450 |
| 10118 | 451 * The `issymmetric' function now checks for symmetry instead of |
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452 Hermitianness. For the latter, ishermitian was created. Also, |
| 10118 | 453 logical scalar is returned rather than the dimension, so |
| 454 `issymmetric ([])' is now true. | |
| 9873 | 455 |
| 10118 | 456 ** Function handles are now aware of overloaded functions. If a |
| 457 function is overloaded, the handle determines at the time of its | |
| 458 reference which function to call. A non-overloaded version does not | |
| 459 need to exist. | |
| 9873 | 460 |
| 10118 | 461 ** Overloading functions for built-in classes (double, int8, cell, |
| 462 etc.) is now compatible with Matlab. | |
| 9408 | 463 |
| 10323 | 464 ** Function handles can now be compared with the == and != operators, |
| 465 as well as the `isequal' function. | |
| 466 | |
| 10118 | 467 ** Performance of concatenation (using []) and the functions `cat', |
| 468 `horzcat', and `vertcat' has been improved for multidimensional | |
| 469 arrays. | |
| 10117 | 470 |
| 9547 | 471 ** The operation-assignment operators +=, -=, *= and /= now behave more |
| 10118 | 472 efficiently in certain cases. For instance, if M is a matrix and S a |
| 473 scalar, then the statement | |
| 9547 | 474 |
| 10118 | 475 M += S; |
| 9547 | 476 |
| 10118 | 477 will operate on M's data in-place if it is not shared by another |
| 478 variable, usually increasing both time and memory efficiency. | |
| 9547 | 479 |
| 9558 | 480 Only selected common combinations are affected, namely: |
| 9547 | 481 |
| 482 matrix += matrix | |
| 483 matrix -= matrix | |
| 9558 | 484 matrix .*= matrix |
| 485 matrix ./= matrix | |
| 486 | |
| 9547 | 487 matrix += scalar |
| 488 matrix -= scalar | |
| 489 matrix *= scalar | |
| 490 matrix /= scalar | |
| 9558 | 491 |
| 9552 | 492 logical matrix |= logical matrix |
| 493 logical matrix &= logical matrix | |
| 9547 | 494 |
| 10118 | 495 where matrix and scalar belong to the same class. The left-hand |
| 496 side must be a simple variable reference. | |
| 9888 | 497 |
| 10118 | 498 Moreover, when unary operators occur in expressions, Octave will |
| 499 also try to do the operation in-place if it's argument is a | |
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500 temporary expression. |
| 9589 | 501 |
| 10118 | 502 ** The effect of comparison operators (<, >, <=, and >=) applied to |
| 503 complex numbers has changed to be consistent with the strict | |
| 504 ordering defined by the `max', `min', and `sort' functions. More | |
| 505 specifically, complex numbers are compared by lexicographical | |
| 506 comparison of the pairs `[abs(z), arg(z)]'. Previously, only real | |
| 14188 | 507 parts were compared; this can be trivially achieved by converting |
| 508 the operands to real values with the `real' function. | |
| 9547 | 509 |
| 10118 | 510 ** The automatic simplification of complex computation results has |
| 511 changed. Octave will now simplify any complex number with a zero | |
| 512 imaginary part or any complex matrix with all elements having zero | |
| 513 imaginary part to a real value. Previously, this was done only for | |
| 514 positive zeros. Note that the behavior of the complex function is | |
| 515 unchanged and it still produces a complex value even if the | |
| 516 imaginary part is zero. | |
| 9826 | 517 |
| 10118 | 518 ** As a side effect of code refactoring in liboctave, the binary |
| 519 logical operations are now more easily amenable to compiler | |
| 520 optimizations and are thus significantly faster. | |
| 9595 | 521 |
| 10118 | 522 ** Octave now allows user-defined `subsasgn' methods to optimize out |
| 523 redundant copies. For more information, see the manual. | |
| 9595 | 524 |
| 10453 | 525 ** More efficient matrix division handling. Octave is now able to |
| 10118 | 526 handle the expressions |
| 9664 | 527 |
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528 M' \ V |
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529 M.' \ V |
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530 V / M |
| 9664 | 531 |
| 10118 | 532 (M is a matrix and V is a vector) more efficiently in certain cases. |
| 533 In particular, if M is triangular, all three expressions will be | |
| 534 handled by a single call to xTRTRS (from LAPACK), with appropriate | |
| 10453 | 535 flags. Previously, all three expressions required a physical |
| 10118 | 536 transpose of M. |
| 9664 | 537 |
| 10118 | 538 ** More efficient handling of certain mixed real-complex matrix |
| 539 operations. For instance, if RM is a real matrix and CM a complex | |
| 540 matrix, | |
| 9664 | 541 |
| 10118 | 542 RM * CM |
| 9664 | 543 |
| 544 can now be evaluated either as | |
| 545 | |
| 546 complex (RM * real (CM), RM * imag (CM)) | |
| 547 | |
| 548 or as | |
| 549 | |
| 550 complex (RM) * CM, | |
| 551 | |
| 10453 | 552 depending on the dimensions. The first form requires more |
| 553 temporaries and copying, but halves the FLOP count, which normally | |
| 554 brings better performance if RM has enough rows. Previously, the | |
| 555 second form was always used. | |
| 9664 | 556 |
| 11111 | 557 Matrix division is similarly affected. |
| 9664 | 558 |
| 10118 | 559 ** More efficient handling of triangular matrix factors returned from |
| 560 factorizations. The functions for computing QR, LU and Cholesky | |
| 561 factorizations will now automatically return the triangular matrix | |
| 562 factors with proper internal matrix_type set, so that it won't need | |
| 563 to be computed when the matrix is used for division. | |
| 9717 | 564 |
| 10118 | 565 ** The built-in `sum' function now handles the non-native summation |
| 566 (i.e., double precision sum of single or integer inputs) more | |
| 567 efficiently, avoiding a temporary conversion of the whole input | |
| 568 array to doubles. Further, `sum' can now accept an extra option | |
| 569 argument, using a compensated summation algorithm rather than a | |
| 570 straightforward sum, which significantly improves precision if lots | |
| 571 of cancellation occurs in the summation. | |
| 9717 | 572 |
| 10118 | 573 ** The built-in `bsxfun' function now uses optimized code for certain |
| 574 cases where built-in operator handles are passed in. Namely, the | |
| 575 optimizations concern the operators `plus', `minus', `times', | |
| 576 `ldivide', `rdivide', `power', `and', `or' (for logical arrays), | |
| 577 the relational operators `eq', `ne', `lt', `le', `gt', `ge', and the | |
| 578 functions `min' and `max'. Optimizations only apply when both | |
| 579 operands are of the same built-in class. Mixed real/complex and | |
| 580 single/double operations will first convert both operands to a | |
| 581 common type. | |
| 9745 | 582 |
| 10118 | 583 ** The `strfind' and `strrep' functions now have compiled |
| 584 implementations, facilitating significantly more efficient searching | |
| 585 and replacing in strings, especially with longer patterns. The code | |
| 586 of `strcat' has been vectorized and is now much more efficient when | |
| 587 many strings are concatenated. The `strcmpi' and `strncmpi' | |
| 588 functions are now built-in functions, providing better performance. | |
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589 |
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590 ** 'str2double' now has a compiled implementation and the API conforms |
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591 to Matlab. The additional Octave-specific features of returning a |
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592 boolean matrix indicating which elements were successfully converted |
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593 has been removed. |
| 10208 | 594 |
| 10453 | 595 ** Matlab-style ignoring input and output function arguments using |
| 11111 | 596 tilde (~) is now supported. Ignored output arguments may be |
| 597 detected from a function using the built-in function `isargout'. | |
| 598 For more details, consult the manual. | |
| 10886 | 599 |
| 10453 | 600 ** The list datatype, deprecated since the introduction of cells, has |
| 601 been removed. | |
| 10276 | 602 |
| 10453 | 603 ** The accumarray function has been optimized and is now significantly |
| 604 faster in certain important cases. | |
| 10054 | 605 |
| 10292 | 606 ** The behavior of isreal and isnumeric functions was changed to be more |
| 607 Matlab-compatible. | |
| 608 | |
| 10406 | 609 ** The integer math & conversion warnings (Octave:int-convert-nan, |
| 610 Octave:int-convert-non-int-val, Octave:int-convert-overflow, | |
| 11111 | 611 Octave:int-math-overflow) have been removed. |
| 10406 | 612 |
| 10453 | 613 ** rem and mod are now built-in functions. They also handle integer |
| 614 types efficiently using integer arithmetic. | |
| 10437 | 615 |
| 10536 | 616 ** Sparse indexing and indexed assignment has been mostly rewritten. |
| 617 Since Octave uses compressed column storage for sparse matrices, | |
| 618 major attention is devoted to operations manipulating whole columns. | |
| 619 Such operations are now significantly faster, as well as some other | |
| 620 important cases. | |
| 621 | |
| 622 Further, it is now possible to pre-allocate a sparse matrix and | |
| 623 subsequently fill it by assignments, provided they meet certain | |
| 624 conditions. For more information, consult the `spalloc' function, | |
| 625 which is no longer a mere dummy. Consequently, nzmax and nnz are no | |
| 11111 | 626 longer always equal in Octave. Octave may also produce a matrix |
| 627 with nnz < nzmax as a result of other operations, so you should | |
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628 consistently use nnz unless you really want to use nzmax (i.e., the |
| 11111 | 629 space allocated for nonzero elements). |
| 10536 | 630 |
| 631 Sparse concatenation is also affected, and concatenating sparse | |
| 632 matrices, especially larger collections, is now significantly more | |
| 11111 | 633 efficient. This applies to both the [] operator and the |
| 10536 | 634 cat/vertcat/horzcat functions. |
| 635 | |
| 11111 | 636 ** It is now possible to optionally employ the xGESDD LAPACK drivers |
| 14188 | 637 for computing the singular value decomposition using svd, instead |
| 11111 | 638 of the default xGESVD, using the configuration pseudo-variable |
| 639 svd_driver. The xGESDD driver can be up to 6x times faster when | |
| 640 singular vectors are requested, but is reported to be somewhat less | |
| 10639 | 641 robust on highly ill-conditioned matrices. |
| 642 | |
| 643 ** Configuration pseudo-variables, such as page_screen_output or | |
| 644 confirm_recursive_rmdir (or the above mentioned svd_driver), now | |
| 645 accept a "local" option as second argument, requesting the change | |
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646 to be undone when the current function returns: |
| 10639 | 647 |
| 648 function [status, msg] = rm_rf (dir) | |
| 649 confirm_recursive_rmdir (false, "local"); | |
| 650 [status, msg] = rmdir (dir, "s"); | |
| 651 ... | |
| 652 endfunction | |
| 653 | |
| 654 Upon return, confirm_recursive_rmdir will be restored to the value | |
| 655 it had on entry to the function, even if there were subsequent | |
| 656 changes to the variable in function rm_rf or any of the functions | |
| 657 it calls. | |
| 658 | |
| 11111 | 659 ** pkg now accepts a -forge option for downloading and installing |
| 660 packages from Octave Forge automatically. For example, | |
| 10774 | 661 |
| 662 pkg install -forge general | |
| 663 | |
| 11111 | 664 will automatically download the latest release of the general |
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665 package and attempt to install it. No automatic resolving of |
| 11111 | 666 dependencies is provided. Further, |
| 10639 | 667 |
| 10774 | 668 pkg list -forge |
| 669 | |
| 670 can be used to list all available packages. | |
| 671 | |
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672 ** The internal data representation of structs has been completely |
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673 rewritten to make certain optimizations feasible. The field data |
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674 can now be shared between structs with equal keys but different |
|
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675 dimensions or values, making operations that preserve the fields |
|
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676 faster. Economized storage is now used for scalar structs (just |
|
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677 like most other scalars), making their usage more |
|
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678 memory-efficient. Certain array-like operations on structs |
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679 (concatenation, uniform cellfun, num2cell) have gained a |
|
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680 significant speed-up. Additionally, the octave_scalar_map class |
|
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681 now provides a simpler interface to work with scalar structs within |
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682 a C++ DLD function. |
| 10639 | 683 |
|
12418
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684 ** Two new formats are available for displaying numbers: |
| 11111 | 685 |
|
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686 format short eng |
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687 format long eng |
| 11111 | 688 |
|
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689 Both display numbers in engineering notation, i.e., mantissa + |
|
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690 exponent where the exponent is a multiple of 3. |
|
10776
062304bd692e
Update NEWS with description of new engineering format for numbers.
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10774
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691 |
|
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|
692 ** The following functions are new in Octave 3.4: |
|
12723
6ed1e0be181e
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693 accumdim erfcx nfields pqpnonneg uigetdir |
|
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694 bitpack fileread nth_element quadcc uigetfile |
|
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695 bitunpack fminbnd onCleanup randi uiputfile |
|
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|
696 blkmm fskipl pbaspect repelems uimenu |
|
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697 cbrt ifelse pie3 reset whitebg |
|
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698 curl ishermitian powerset rsf2csf |
|
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|
699 chop isindex ppder saveas |
|
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doc: Update NEWS with new functions for release 3.4.1
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|
700 daspect luupdate ppint strread |
|
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|
701 divergence merge ppjumps textread |
|
11109
41d18f6342f9
remove image_viewer function
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|
702 |
|
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|
703 ** Using the image function to view images with external programs such |
|
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704 as display, xv, and xloadimage is no longer supported. The |
|
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|
705 image_viewer function has also been removed. |
|
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|
706 |
|
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|
707 ** The behavior of struct assignments to non-struct values has been |
|
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|
708 changed. Previously, it was possible to overwrite an arbitrary |
|
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|
709 value: |
|
11109
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remove image_viewer function
John W. Eaton <jwe@octave.org>
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|
710 |
|
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|
711 a = 1; |
|
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|
712 a.x = 2; |
| 10873 | 713 |
|
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|
714 This is no longer possible unless a is an empty matrix or cell |
|
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|
715 array. |
|
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|
716 |
|
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|
717 ** The dlmread function has been extended to allow specifying a custom |
|
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|
718 value for empty fields. |
| 10829 | 719 |
|
12418
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|
720 ** The dlmread and dlmwrite functions have been modified to accept |
|
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|
721 file IDs (as returned by fopen) in addition to file names. |
| 11111 | 722 |
|
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|
723 ** Octave can now optimize away the interpreter overhead of an |
|
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|
724 anonymous function handle, if the function simply calls another |
|
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725 function or handle with some of its parameters bound to certain |
|
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726 values. Example: |
|
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|
727 |
|
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728 f = @(x) sum (x, 1); |
| 10966 | 729 |
|
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730 When f is called, the call is forwarded to @sum with the constant 1 |
|
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|
731 appended, and the anonymous function call does not occur on the |
|
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|
732 call stack. |
| 10829 | 733 |
| 12424 | 734 ** For compatibility with Matlab, mu2lin (x) is now equivalent to |
| 735 mu2lin (x, 0). | |
| 736 | |
| 737 ** The new function `history_control' may be used to control the way | |
| 738 command lines are added to the history list when Octave is using | |
| 739 readline for command-line editing. For example | |
| 740 | |
| 741 history_control ("ignoredups") | |
| 742 | |
| 743 tells Octave to avoid adding duplicate lines to the history list. | |
| 744 | |
| 745 ** Octave now uses the gnulib library for improved portability and to | |
| 746 avoid bugs in operating system functions. | |
| 747 | |
|
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748 ** Deprecated functions. |
|
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diff
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|
749 |
|
8ea4cf59c41b
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John W. Eaton <jwe@octave.org>
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diff
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|
750 The following functions were deprecated in Octave 3.0 and have been |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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diff
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|
751 removed from Octave 3.4. |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
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diff
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|
752 |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
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diff
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|
753 beta_cdf geometric_pdf pascal_pdf |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
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diff
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|
754 beta_inv geometric_rnd pascal_rnd |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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diff
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|
755 beta_pdf hypergeometric_cdf poisson_cdf |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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diff
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|
756 beta_rnd hypergeometric_inv poisson_inv |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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diff
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|
757 binomial_cdf hypergeometric_pdf poisson_pdf |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
11111
diff
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|
758 binomial_inv hypergeometric_rnd poisson_rnd |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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diff
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|
759 binomial_pdf intersection polyinteg |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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diff
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|
760 binomial_rnd is_bool setstr |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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diff
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|
761 chisquare_cdf is_complex struct_contains |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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diff
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|
762 chisquare_inv is_list struct_elements |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
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diff
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|
763 chisquare_pdf is_matrix t_cdf |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
|
764 chisquare_rnd is_scalar t_inv |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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diff
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|
765 clearplot is_square t_pdf |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
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diff
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|
766 clg is_stream t_rnd |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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|
767 com2str is_struct uniform_cdf |
|
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list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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|
768 exponential_cdf is_symmetric uniform_inv |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
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parents:
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diff
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|
769 exponential_inv is_vector uniform_pdf |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
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diff
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|
770 exponential_pdf isstr uniform_rnd |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
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|
771 exponential_rnd lognormal_cdf weibcdf |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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diff
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|
772 f_cdf lognormal_inv weibinv |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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diff
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|
773 f_inv lognormal_pdf weibpdf |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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diff
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|
774 f_pdf lognormal_rnd weibrnd |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
|
775 f_rnd meshdom weibull_cdf |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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diff
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|
776 gamma_cdf normal_cdf weibull_inv |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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diff
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|
777 gamma_inv normal_inv weibull_pdf |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
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|
778 gamma_pdf normal_pdf weibull_rnd |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
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|
779 gamma_rnd normal_rnd wiener_rnd |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
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|
780 geometric_cdf pascal_cdf |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
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|
781 geometric_inv pascal_inv |
|
8ea4cf59c41b
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diff
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|
782 |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
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|
783 The following functions were deprecated in Octave 3.2 and will |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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diff
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|
784 be removed from Octave 3.6 (or whatever version is the second major |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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|
785 release after 3.2): |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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diff
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|
786 |
|
11390
7ca273af4309
Deprecate sphcat and spvcat functions.
Rik <octave@nomad.inbox5.com>
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diff
changeset
|
787 create_set spcholinv splu |
|
7ca273af4309
Deprecate sphcat and spvcat functions.
Rik <octave@nomad.inbox5.com>
parents:
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diff
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|
788 dmult spcumprod spmax |
|
7ca273af4309
Deprecate sphcat and spvcat functions.
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parents:
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|
789 iscommand spcumsum spmin |
|
7ca273af4309
Deprecate sphcat and spvcat functions.
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parents:
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|
790 israwcommand spdet spprod |
|
7ca273af4309
Deprecate sphcat and spvcat functions.
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diff
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|
791 lchol spdiag spqr |
|
7ca273af4309
Deprecate sphcat and spvcat functions.
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|
792 loadimage spfind spsum |
|
7ca273af4309
Deprecate sphcat and spvcat functions.
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|
793 mark_as_command sphcat spsumsq |
|
7ca273af4309
Deprecate sphcat and spvcat functions.
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|
794 mark_as_rawcommand spinv spvcat |
|
7ca273af4309
Deprecate sphcat and spvcat functions.
Rik <octave@nomad.inbox5.com>
parents:
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|
795 spatan2 spkron str2mat |
|
7ca273af4309
Deprecate sphcat and spvcat functions.
Rik <octave@nomad.inbox5.com>
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|
796 spchol splchol unmark_command |
|
7ca273af4309
Deprecate sphcat and spvcat functions.
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|
797 spchol2inv split unmark_rawcommand |
|
11112
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|
798 |
|
8ea4cf59c41b
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John W. Eaton <jwe@octave.org>
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changeset
|
799 The following functions have been deprecated in Octave 3.4 and will |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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|
800 be removed from Octave 3.8 (or whatever version is the second major |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
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diff
changeset
|
801 release after 3.4): |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
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|
802 |
|
14354
55bb8c902a4d
maint: Remove deprecated functions from dev branch for next (3.8) release.
Rik <octave@nomad.inbox5.com>
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|
803 autocor cellidx gammai is_global replot values |
|
55bb8c902a4d
maint: Remove deprecated functions from dev branch for next (3.8) release.
Rik <octave@nomad.inbox5.com>
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|
804 autocov dispatch glpkmex krylovb saveimage |
|
55bb8c902a4d
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Rik <octave@nomad.inbox5.com>
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|
805 betai fstat intwarning perror strerror |
|
11112
8ea4cf59c41b
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|
806 |
|
7990
86dae6e5b83c
Initial update of NEWS for 3.2 release
David Bateman <dbateman@free.fr>
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diff
changeset
|
807 Summary of important user-visible changes for version 3.2: |
| 5913 | 808 --------------------------------------------------------- |
| 2452 | 809 |
| 8737 | 810 ** Compatibility with Matlab graphics has been improved. |
| 6329 | 811 |
|
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|
812 The hggroup object and associated listener callback functions have |
| 8737 | 813 been added allowing the inclusion of group objects. Data sources |
|
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|
814 have been added to these group objects such that |
|
3b53b25e2550
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|
815 |
|
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|
816 x = 0:0.1:10; |
|
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|
817 y = sin (x); |
|
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|
818 plot (x, y, "ydatasource", "y"); |
|
3b53b25e2550
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|
819 for i = 1 : 100 |
|
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|
820 pause(0.1) |
|
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|
821 y = sin (x + 0.1 * i); |
| 14188 | 822 refreshdata (); |
|
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|
823 endfor |
|
3b53b25e2550
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diff
changeset
|
824 |
| 8737 | 825 works as expected. This capability has be used to introduce |
|
9031
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Documentation cleanup of top-level Octave directory (READMEs, INSTALL)
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|
826 stem-series, bar-series, etc., objects for better Matlab |
| 8737 | 827 compatibility. |
| 828 | |
| 829 ** New graphics functions: | |
| 830 | |
|
11576
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|
831 addlistener ezcontour gcbo refresh |
|
8ac9687dbe9f
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|
832 addproperty ezcontourf ginput refreshdata |
|
8ac9687dbe9f
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|
833 allchild ezmesh gtext specular |
|
8ac9687dbe9f
rename backend to graphics_toolkit
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|
834 available_graphics_toolkits ezmeshc intwarning surfl |
|
8ac9687dbe9f
rename backend to graphics_toolkit
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|
835 graphics_toolkit ezplot ishghandle trisurf |
|
8ac9687dbe9f
rename backend to graphics_toolkit
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|
836 cla ezplot3 isocolors waitforbuttonpress |
|
8ac9687dbe9f
rename backend to graphics_toolkit
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|
837 clabel ezpolar isonormals |
|
8ac9687dbe9f
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|
838 comet ezsurf isosurface |
|
8ac9687dbe9f
rename backend to graphics_toolkit
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|
839 dellistener findall linkprop |
|
8ac9687dbe9f
rename backend to graphics_toolkit
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|
840 diffuse gcbf plotmatrix |
|
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|
841 |
| 8737 | 842 ** New experimental OpenGL/FLTK based plotting system. |
| 843 | |
| 844 An experimental plotting system based on OpenGL and the FLTK | |
|
11576
8ac9687dbe9f
rename backend to graphics_toolkit
John W. Eaton <jwe@octave.org>
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diff
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|
845 toolkit is now part of Octave. This graphics toolkit is disabled by |
| 8737 | 846 default. You can switch to using it with the command |
|
8070
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|
847 |
|
11576
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|
848 graphics_toolkit ("fltk") |
|
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|
849 |
|
3b53b25e2550
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diff
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|
850 for all future figures or for a particular figure with the command |
|
3b53b25e2550
Add data sources and line series
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diff
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|
851 |
|
11576
8ac9687dbe9f
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diff
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|
852 graphics_toolkit (h, "fltk") |
|
8070
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|
853 |
| 11139 | 854 where "h" is a valid figure handle. |
|
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diff
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|
855 |
| 8737 | 856 ** Functions providing direct access to gnuplot have been removed. |
| 857 | |
|
7990
86dae6e5b83c
Initial update of NEWS for 3.2 release
David Bateman <dbateman@free.fr>
parents:
7279
diff
changeset
|
858 The functions __gnuplot_plot__, __gnuplot_set__, __gnuplot_raw__, |
|
86dae6e5b83c
Initial update of NEWS for 3.2 release
David Bateman <dbateman@free.fr>
parents:
7279
diff
changeset
|
859 __gnuplot_show__, __gnuplot_replot__, __gnuplot_splot__, |
| 8737 | 860 __gnuplot_save_data__ and __gnuplot_send_inline_data__ have been |
| 861 removed from Octave. These function were incompatible with the | |
| 862 high level graphics handle code. | |
| 6329 | 863 |
| 8885 | 864 ** The Control, Finance and Quaternion functions have been removed. |
| 865 | |
| 866 These functions are now available as separate packages from | |
| 867 | |
| 868 http://octave.sourceforge.net/packages.html | |
| 869 | |
| 870 and can be reinstalled using the Octave package manager (see | |
| 871 the pkg function). | |
| 872 | |
| 873 ** Specific sparse matrix functions removed. | |
| 874 | |
| 875 The following functions, which handled only sparse matrices have | |
| 876 been removed. Instead of calling these functions directly, you | |
| 877 should use the corresponding function without the "sp" prefix. | |
| 8737 | 878 |
| 8885 | 879 spatan2 spcumsum spkron spprod |
| 880 spchol spdet splchol spqr | |
| 881 spchol2inv spdiag splu spsum | |
| 882 spcholinv spfind spmax spsumsqk | |
| 883 spcumprod spinv spmin | |
| 884 | |
| 885 ** Improvements to the debugger. | |
| 886 | |
| 887 The interactive debugging features have been improved. Stopping | |
| 888 on statements with dbstop should work correctly now. Stepping | |
| 889 into and over functions, and stepping one statement at a time | |
| 890 (with dbstep) now works. Moving up and down the call stack with | |
| 891 dbup and dbdown now works. The dbstack function is now available | |
| 892 to print the current function call stack. The new dbquit function | |
| 893 is available to exit the debugging mode. | |
| 894 | |
| 895 ** Improved traceback error messages. | |
| 896 | |
| 897 Traceback error messages are much more concise and easier to | |
| 898 understand. They now display information about the function call | |
| 899 stack instead of the stack of all statements that were active at | |
| 900 the point of the error. | |
|
8014
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John W. Eaton <jwe@octave.org>
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7990
diff
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|
901 |
| 8737 | 902 ** Object Oriented Programming. |
|
8405
d79dfbff2f9d
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Jaroslav Hajek <highegg@gmail.com>
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8396
diff
changeset
|
903 |
| 8737 | 904 Octave now includes OOP features and the user can create their own |
| 905 class objects and overloaded functions and operators. For | |
| 906 example, all methods of a class called "myclass" will be found in | |
| 907 a directory "@myclass" on the users path. The class specific | |
| 908 versions of functions and operators take precedence over the | |
| 909 generic versions of these functions. | |
| 910 | |
| 911 New functions related to OOP include | |
| 7189 | 912 |
| 8737 | 913 class inferiorto isobject loadobj methods superiorto |
| 914 | |
| 915 See the Octave manual for more details. | |
| 7038 | 916 |
| 8747 | 917 ** Parsing of Command-style Functions. |
| 918 | |
| 919 Octave now parses command-style functions without needing to first | |
| 920 declare them with "mark_as_command". The rules for recognizing a | |
| 921 command-style function calls are | |
| 922 | |
| 923 * A command must appear as the first word in a statement, | |
| 924 followed by a space. | |
| 925 | |
| 926 * The first character after the space must not be '=' or '(' | |
| 927 | |
| 928 * The next token after the space must not look like a binary | |
| 929 operator. | |
| 930 | |
| 931 These rules should be mostly compatible with the way Matlab parses | |
| 932 command-style function calls and allow users to define commands in | |
| 933 .m files without having to mark them as commands. | |
| 934 | |
| 935 Note that previous versions of Octave allowed expressions like | |
| 936 | |
| 937 x = load -text foo.dat | |
| 938 | |
| 939 but an expression like this will now generate a parse error. In | |
| 940 order to assign the value returned by a function to a variable, | |
| 941 you must use the normal function call syntax: | |
| 942 | |
| 943 x = load ("-text", "foo.dat"); | |
| 944 | |
| 8737 | 945 ** Block comments. |
| 946 | |
| 8747 | 947 Commented code can be between matching "#{" and "#}" or "%{" and |
| 948 "%}" markers, even if the commented code spans several line. This | |
| 949 allows blocks code to be commented, without needing to comment | |
| 950 each line. For example, | |
| 5814 | 951 |
| 8747 | 952 function [s, t] = func (x, y) |
| 953 s = 2 * x; | |
| 954 #{ | |
| 955 s *= y; | |
| 956 t = y + x; | |
| 957 #} | |
|
7990
86dae6e5b83c
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David Bateman <dbateman@free.fr>
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7279
diff
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|
958 endfunction |
| 5814 | 959 |
| 8747 | 960 the lines "s *= y;" and "t = y + x" will not be executed. |
| 8737 | 961 |
|
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|
962 ** If any subfunction in a file ends with "end" or "endfunction", then |
|
5252f12537f8
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|
963 they all must end that way. Previously, Octave accepted |
|
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|
964 |
|
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|
965 function main () |
|
5252f12537f8
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|
966 ... |
|
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967 # no endfunction here. |
|
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|
968 function sub () |
|
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|
969 ... |
|
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|
970 endfunction |
|
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|
971 |
|
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|
972 but this is no longer allowed. |
|
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|
973 |
| 8737 | 974 ** Special treatment in the parser of expressions like "a' * b". |
| 2452 | 975 |
| 8737 | 976 In these cases the transpose is no longer explicitly formed and |
| 977 BLAS libraries are called with the transpose flagged, | |
| 978 significantly improving performance for these kinds of | |
| 979 operations. | |
|
8417
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|
980 |
| 8737 | 981 ** Single Precision data type. |
| 2452 | 982 |
| 8737 | 983 Octave now includes a single precision data type. Single |
| 984 precision variables can be created with the "single" command, or | |
|
9034
52515efc50c0
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Rik <rdrider0-list@yahoo.com>
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diff
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|
985 from functions like ones, eye, etc. For example, |
| 5995 | 986 |
| 8737 | 987 single (1) |
| 988 ones (2, 2, "single") | |
| 989 zeros (2, 2, "single") | |
| 990 eye (2, 2, "single") | |
| 991 Inf (2, 2, "single") | |
| 992 NaN (2, 2, "single") | |
| 993 NA (2, 2, "single") | |
| 7279 | 994 |
| 8737 | 995 all create single precision variables. For compatibility with |
| 996 Matlab, mixed double/single precision operators and functions | |
| 997 return single precision types. | |
| 998 | |
| 999 As a consequence of this addition to Octave the internal | |
|
7990
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7279
diff
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|
1000 representation of the double precision NA value has changed, and |
|
86dae6e5b83c
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diff
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|
1001 so users that make use of data generated by Octave with R or |
|
86dae6e5b83c
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diff
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|
1002 visa-versa are warned that compatibility might not be assured. |
| 7279 | 1003 |
| 8737 | 1004 ** Improved array indexing. |
| 1005 | |
| 1006 The underlying code used for indexing of arrays has been | |
|
9034
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diff
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|
1007 completely rewritten and indexing is now significantly faster. |
| 8737 | 1008 |
| 8755 | 1009 ** Improved memory management. |
| 1010 | |
| 1011 Octave will now attempt to share data in some cases where previously | |
| 1012 a copy would be made, such as certain array slicing operations or | |
|
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|
1013 conversions between cells, structs and cs-lists. This usually reduces |
| 8755 | 1014 both time and memory consumption. |
| 9128 | 1015 Also, Octave will now attempt to detect and optimize usage of a vector |
| 1016 as a stack, when elements are being repeatedly inserted at/removed from | |
| 1017 the end of the vector. | |
| 8755 | 1018 |
| 8738 | 1019 ** Improved performance for reduction operations. |
| 1020 | |
| 8755 | 1021 The performance of the sum, prod, sumsq, cumsum, cumprod, any, all, |
| 1022 max and min functions has been significantly improved. | |
| 8738 | 1023 |
| 9006 | 1024 ** Sorting and searching. |
| 1025 | |
| 1026 The performance of sort has been improved, especially when sorting | |
| 10453 | 1027 indices are requested. An efficient built-in issorted |
| 1028 implementation was added. The sortrows function now uses a more | |
|
12702
013cd94d8d7f
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12698
diff
changeset
|
1029 efficient algorithm, especially in the homogeneous case. The lookup |
| 10453 | 1030 function is now a built-in function performing a binary search, |
| 1031 optimized for long runs of close elements. Lookup also works with | |
| 1032 cell arrays of strings. | |
| 9006 | 1033 |
| 1034 ** Range arithmetics | |
| 1035 | |
| 10453 | 1036 For some operations on ranges, Octave will attempt to keep the |
| 1037 result as a range. These include negation, adding a scalar, | |
|
14093
050bc580cb60
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|
1038 subtracting a scalar, and multiplying by a scalar. Ranges with zero |
| 10453 | 1039 increment are allowed and can be constructed using the built-in |
| 1040 function `ones'. | |
| 9006 | 1041 |
| 1042 ** Various performance improvements. | |
| 1043 | |
| 10453 | 1044 Performance of a number of other built-in operations and functions |
| 1045 was improved, including: | |
| 9006 | 1046 |
| 1047 * logical operations | |
| 1048 * comparison operators | |
| 1049 * element-wise power | |
| 1050 * accumarray | |
| 1051 * cellfun | |
| 1052 * isnan | |
| 1053 * isinf | |
| 1054 * isfinite | |
| 1055 * nchoosek | |
| 1056 * repmat | |
| 1057 * strcmp | |
| 1058 | |
| 8737 | 1059 ** 64-bit integer arithmetic. |
| 1060 | |
| 1061 Arithmetic with 64-bit integers (int64 and uint64 types) is fully | |
| 1062 supported, with saturation semantics like the other integer types. | |
| 1063 Performance of most integer arithmetic operations has been | |
| 1064 improved by using integer arithmetic directly. Previously, Octave | |
| 1065 performed integer math with saturation semantics by converting the | |
| 1066 operands to double precision, performing the operation, and then | |
| 1067 converting the result back to an integer value, truncating if | |
| 1068 necessary. | |
| 1069 | |
| 8885 | 1070 ** Diagonal and permutation matrices. |
| 1071 | |
| 1072 The interpreter can now treat diagonal and permutation matrices as | |
| 1073 special objects that store only the non-zero elements, rather than | |
| 1074 general full matrices. Therefore, it is now possible to construct | |
| 1075 and use these matrices in linear algebra without suffering a | |
| 1076 performance penalty due to storing large numbers of zero elements. | |
| 1077 | |
| 1078 ** Improvements to fsolve. | |
| 1079 | |
| 1080 The fsolve function now accepts an option structure argument (see | |
| 1081 also the optimset function). The INFO values returned from fsolve | |
| 1082 have changed to be compatible with Matlab's fsolve function. | |
| 1083 Additionally, fsolve is now able to solve overdetermined systems, | |
| 1084 complex-differentiable complex systems, systems with a sparse | |
| 1085 jacobian and can work in single precision if given single precision | |
|
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|
1086 inputs. It can also be called recursively. |
| 8885 | 1087 |
| 8737 | 1088 ** Improvements to the norm function. |
| 1089 | |
| 1090 The norm function is now able to compute row or column norms of a | |
| 1091 matrix in a single call, as well as general matrix p-norms. | |
| 1092 | |
| 1093 ** New functions for computing some eigenvalues or singular values. | |
| 1094 | |
| 1095 The eigs and svds functions have been included in Octave. These | |
| 1096 functions require the ARPACK library (now distributed under a | |
| 1097 GPL-compatible license). | |
| 1098 | |
| 1099 ** New QR and Cholesky factorization updating functions. | |
|
8370
34960ba08a81
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Jaroslav Hajek <highegg@gmail.com>
parents:
8292
diff
changeset
|
1100 |
| 8737 | 1101 choldelete cholshift qrdelete qrshift |
| 1102 cholinsert cholupdate qrinsert qrupdate | |
| 1103 | |
| 1104 ** New quadrature functions. | |
| 1105 | |
| 1106 dblquad quadgk quadv triplequad | |
| 1107 | |
| 8885 | 1108 ** New functions for reading and writing images. |
| 1109 | |
| 1110 The imwrite and imread functions have been included in Octave. | |
| 1111 These functions require the GraphicsMagick library. The new | |
| 1112 function imfinfo provides information about an image file (size, | |
| 1113 type, colors, etc.) | |
| 1114 | |
|
9215
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1115 ** The input_event_hook function has been replaced by the pair of |
|
1500d0197484
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1116 functions add_input_event_hook and remove_input_event_hook so that |
|
1500d0197484
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1117 more than one hook function may be installed at a time. |
|
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1118 |
| 8737 | 1119 ** Other miscellaneous new functions. |
|
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|
1120 |
|
8932
2d0f8692a82e
Add the 'histc' function
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1121 addtodate hypot reallog |
|
2d0f8692a82e
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|
1122 bicgstab idivide realpow |
| 9006 | 1123 cellslices info realsqrt |
| 1124 cgs interp1q rectint | |
| 1125 command_line_path isdebugmode regexptranslate | |
| 1126 contrast isfloat restoredefaultpath | |
| 1127 convn isstrprop roundb | |
| 1128 cummin log1p rundemos | |
| 1129 cummax lsqnonneg runlength | |
| 1130 datetick matlabroot saveobj | |
| 1131 display namelengthmax spaugment | |
| 1132 expm1 nargoutchk strchr | |
| 1133 filemarker pathdef strvcat | |
| 1134 fstat perl subspace | |
| 1135 full prctile symvar | |
| 1136 fzero quantile treelayout | |
| 1137 genvarname re_read_readline_init_file validatestring | |
| 1138 histc | |
|
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|
1139 |
| 8885 | 1140 ** Changes to strcat. |
| 1141 | |
| 1142 The strcat function is now compatible with Matlab's strcat | |
| 1143 function, which removes trailing whitespace when concatenating | |
| 1144 character strings. For example | |
| 1145 | |
| 1146 strcat ('foo ', 'bar') | |
| 1147 ==> 'foobar' | |
| 1148 | |
| 1149 The new function cstrcat provides the previous behavior of | |
| 1150 Octave's strcat. | |
| 1151 | |
| 1152 ** Improvements to the help functions. | |
| 1153 | |
|
9034
52515efc50c0
Documentation cleanup on NEWS file
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1154 The help system has been mostly re-implemented in .m files to make |
| 8885 | 1155 it easier to modify. Performance of the lookfor function has been |
| 1156 greatly improved by caching the help text from all functions that | |
| 1157 are distributed with Octave. The pkg function has been modified | |
| 1158 to generate cache files for external packages when they are | |
| 1159 installed. | |
| 1160 | |
|
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1161 ** Deprecated functions. |
|
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1162 |
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1163 The following functions were deprecated in Octave 3.0 and will be |
|
11112
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1164 removed from Octave 3.4 (or whatever version is the second major |
|
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|
1165 release after 3.0): |
|
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1166 |
|
11112
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1167 beta_cdf geometric_pdf pascal_pdf |
|
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1168 beta_inv geometric_rnd pascal_rnd |
|
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|
1169 beta_pdf hypergeometric_cdf poisson_cdf |
|
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|
1170 beta_rnd hypergeometric_inv poisson_inv |
|
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|
1171 binomial_cdf hypergeometric_pdf poisson_pdf |
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|
1172 binomial_inv hypergeometric_rnd poisson_rnd |
|
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|
1173 binomial_pdf intersection polyinteg |
|
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|
1174 binomial_rnd is_bool setstr |
|
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|
1175 chisquare_cdf is_complex struct_contains |
|
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|
1176 chisquare_inv is_list struct_elements |
|
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|
1177 chisquare_pdf is_matrix t_cdf |
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|
1178 chisquare_rnd is_scalar t_inv |
|
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|
1179 clearplot is_square t_pdf |
|
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|
1180 clg is_stream t_rnd |
|
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|
1181 com2str is_struct uniform_cdf |
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|
1182 exponential_cdf is_symmetric uniform_inv |
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|
1183 exponential_inv is_vector uniform_pdf |
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|
1184 exponential_pdf isstr uniform_rnd |
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|
1185 exponential_rnd lognormal_cdf weibcdf |
|
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|
1186 f_cdf lognormal_inv weibinv |
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1187 f_inv lognormal_pdf weibpdf |
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1188 f_pdf lognormal_rnd weibrnd |
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1189 f_rnd meshdom weibull_cdf |
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1190 gamma_cdf normal_cdf weibull_inv |
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|
1191 gamma_inv normal_inv weibull_pdf |
|
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1192 gamma_pdf normal_pdf weibull_rnd |
|
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1193 gamma_rnd normal_rnd wiener_rnd |
|
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1194 geometric_cdf pascal_cdf |
|
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1195 geometric_inv pascal_inv |
|
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1196 |
|
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|
1197 The following functions are now deprecated in Octave 3.2 and will |
|
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|
1198 be removed from Octave 3.6 (or whatever version is the second major |
|
8888
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|
1199 release after 3.2): |
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1200 |
|
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1201 create_set spcholinv spmax |
|
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|
1202 dmult spcumprod spmin |
|
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1203 iscommand spcumsum spprod |
|
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1204 israwcommand spdet spqr |
|
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|
1205 lchol spdiag spsum |
|
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|
1206 loadimage spfind spsumsq |
|
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|
1207 mark_as_command spinv str2mat |
|
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|
1208 mark_as_rawcommand spkron unmark_command |
|
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|
1209 spatan2 splchol unmark_rawcommand |
|
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|
1210 spchol split |
|
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|
1211 spchol2inv splu |
|
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|
1212 |
|
7990
86dae6e5b83c
Initial update of NEWS for 3.2 release
David Bateman <dbateman@free.fr>
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|
1213 See NEWS.3 for old news. |