Mercurial > hg > octave-lyh
annotate NEWS @ 13923:7b83576b3b48
Update NEWS with auto BSX info
| author | Jordi Gutiérrez Hermoso <jordigh@octave.org> |
|---|---|
| date | Wed, 23 Nov 2011 00:20:00 -0500 |
| parents | 8cb79741769d |
| children | 1f6d17b383f8 |
| rev | line source |
|---|---|
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1 Summary of important user-visible changes for version 3.6: |
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2 --------------------------------------------------------- |
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3 |
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4 ** The PCRE library is now required to build Octave. |
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5 |
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6 ** The following binary elementwise operators and functions now perform |
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7 Numpy-like broadcasting (a.k.a. binary singleton expansion): |
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8 |
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9 plus ldivide rem eq gt xor |
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10 minus power mod ne ge |
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11 times max atan2 lt and |
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12 rdivide min hypot le or |
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13 |
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14 + .* & |
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15 - ./ | |
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16 .+ .\ |
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17 .- .^ |
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18 |
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19 += .*= &= |
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20 -= ./= |= |
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21 .+= .\= |
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22 .-= .^= |
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23 |
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24 This makes the bsxfun function mostly redundant except for |
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25 user-defined functions. A new section in the manual has been written |
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26 to explain and clarify this change. |
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27 |
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28 ** Octave now features a profiler, thanks to the work of Daniel Kraft |
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29 under the Google Summer of Code mentorship program. The manual has |
| 13262 | 30 been updated to reflect this addition. The new user-visible |
| 31 functions are profexplore, profile, and profshow. | |
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32 |
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33 ** Overhaul of statistical distribution functions |
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34 |
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35 Functions now return "single" outputs for inputs of class "single". |
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36 |
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37 75% reduction in memory usage through use of logical indexing. |
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38 |
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39 Random sample functions now use the same syntax as rand() and accept |
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40 a comma separated list of dimensions or a dimension vector. |
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41 |
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42 Functions have been made Matlab-compatible with regard to special |
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43 cases (probability on boundaries, probabilities for values outside |
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44 distribution, etc.). This may cause subtle changes to existing |
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45 scripts. |
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46 |
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47 negative binomial function has been extended to real, non-integer inputs. |
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48 discrete_inv() now returns v(1) for 0 instead of NaN. |
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49 nbincdf() recoded to use closed form solution with betainc(). |
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50 |
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51 ** strread, textscan, and textread have been completely revamped. |
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52 |
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53 They now support nearly all Matlab functionality including: |
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54 |
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55 * ML-compatible whitespace and delimiter defaults |
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56 |
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57 * ML-compatible options: 'whitespace', treatasempty', |
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58 format string repeat count, user-specified comment style, uneven-length |
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59 output arrays, %n and %u conversion specifiers (provisionally) |
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60 |
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61 ** All .m string functions have been modified for better performance or greater |
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62 Matlab compatibility. Performance gains of 15X-30X have been demonstrated. |
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63 Operations on cell array of strings no longer pay quite as high a penalty |
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64 as those on 2-D character arrays. |
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65 |
| 13262 | 66 deblank: Now requires character or cellstr input. |
| 67 strtrim: Now requires character or cellstr input. | |
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68 No longer trims nulls ("\0") from string for ML compatibility. |
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69 strmatch: Follows documentation precisely and ignores trailing spaces |
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70 in pattern and in string. Note that Matlab documents this |
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71 behavior but the implementation does *not* always follow it. |
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72 substr: Now possible to specify a negative LEN option which extracts |
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73 to within LEN of the end of the string. |
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74 strtok: Now accepts cellstr input. |
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75 base2dec, bin2dec, hex2dec: Now accept cellstr inputs. |
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76 dec2base, dec2bin, dec2hex: Now accept cellstr inputs. |
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77 index, rindex: Now accept 2-D character array input. |
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78 strsplit: Now accepts 2-D character array input. |
| 13262 | 79 |
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80 ** Geometry functions derived from Qhull (convhull, delaunay, voronoi) |
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81 have been revamped. The options passed to the underlying qhull command |
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82 have been changed for better results or for Matlab compatibility. |
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83 |
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84 convhull : Default options are "Qt" for 2D, 3D, 4D inputs |
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85 Default options are "Qt Qx" for 5D and higher |
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86 delaunay : Default options are "Qt Qbb Qc Qz" for 2D and 3D inputs |
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87 Default options are "Qt Qbb Qc Qx" for 4D and higher |
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88 voronoi : No default arguments |
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89 |
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90 ** Date/Time functions updated. |
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91 Millisecond support with FFF format string now supported. |
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92 |
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93 datestr : Numerical formats 21, 22, 29 changed to match Matlab. |
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94 Now accepts cellstr inputs. |
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95 |
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96 ** Octave warning IDs updated |
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97 "associativity-change": removed |
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98 "complex-cmp-ops" : removed |
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99 "empty-list-elements" : removed |
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100 "fortran-indexing" : removed |
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101 "precedence-change" : removed |
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102 "string-concat" : renamed to "mixed-string-concat" |
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103 |
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104 ** Matlab-compatible preference functions added: |
| 13262 | 105 |
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106 addpref getpref ispref rmpref setpref |
| 13262 | 107 |
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108 ** New keyword parfor |
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109 parfor (parallel for loop) is now recognized as a valid keyword. |
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110 Implementation, however, is still mapped to an ordinary for loop. |
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111 |
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112 ** Other new functions added in 3.6.0: |
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113 |
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114 is_dq_string nthargout usejava |
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115 is_sq_string python waitbar |
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116 narginchk recycle zscore |
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117 |
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118 ** Deprecated functions. |
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119 |
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120 The following functions were deprecated in Octave 3.2 and have been |
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121 removed from Octave 3.6. |
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122 |
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123 create_set spcholinv splu |
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124 dmult spcumprod spmax |
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125 iscommand spcumsum spmin |
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126 israwcommand spdet spprod |
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127 lchol spdiag spqr |
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128 loadimage spfind spsum |
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129 mark_as_command sphcat spsumsq |
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130 mark_as_rawcommand spinv spvcat |
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131 spatan2 spkron str2mat |
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132 spchol splchol unmark_command |
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133 spchol2inv split unmark_rawcommand |
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134 |
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135 The following functions have been deprecated in Octave 3.6 and will |
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136 be removed from Octave 3.10 (or whatever version is the second major |
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137 release after 3.6): |
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138 |
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139 cut is_duplicate_entry |
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140 cor polyderiv |
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141 corrcoef studentize |
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142 __error_text__ sylvester_matrix |
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143 error_text |
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144 |
| 13251 | 145 Summary of important user-visible changes for version 3.4.3: |
| 146 ----------------------------------------------------------- | |
| 147 | |
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148 ** Octave 3.4.3 is a bug fixing release. |
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149 |
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150 Summary of important user-visible changes for version 3.4.2: |
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151 ----------------------------------------------------------- |
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152 |
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153 ** Octave 3.4.2 fixes some minor installation problems that affected |
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154 version 3.4.1. |
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155 |
| 12709 | 156 Summary of important user-visible changes for version 3.4.1: |
| 157 ----------------------------------------------------------- | |
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158 |
| 12709 | 159 ** Octave 3.4.1 is primarily a bug fixing release. |
| 160 | |
| 161 ** IMPORTANT note about binary incompatibility in this release: | |
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162 |
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163 Binary compatibility for all 3.4.x releases was originally planned, |
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164 but this is impossible for the 3.4.1 release due to a bug in the way |
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165 shared libraries were built in Octave 3.4.0. Because of this bug, |
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166 .oct files built for Octave 3.4.0 must be recompiled before they |
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167 will work with Octave 3.4.1. |
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168 |
| 12709 | 169 Given that there would be binary incompatibilities with shared |
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170 libraries going from Octave 3.4.0 to 3.4.1, the following |
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171 incompatible changes were also made in this release: |
| 12709 | 172 |
| 173 * The Perl Compatible Regular Expression (PCRE) library is now | |
| 174 required to build Octave. | |
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175 |
| 12712 | 176 * Octave's libraries and .oct files are now installed in |
| 177 subdirectories of $libdir instead of $libexecdir. | |
| 178 | |
| 12709 | 179 Any future Octave 3.4.x release versions should remain binary |
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180 compatible with Octave 3.4.1 as proper library versioning is now |
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181 being used as recommended by the libtool manual. |
| 12709 | 182 |
| 183 ** The following functions have been deprecated in Octave 3.4.1 and will | |
| 184 be removed from Octave 3.8 (or whatever version is the second major | |
| 185 release after 3.4): | |
| 186 | |
| 187 cquad is_duplicate_entry perror strerror | |
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188 |
| 12709 | 189 ** The following functions are new in 3.4.1: |
| 190 | |
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191 colstyle gmres iscolumn isrow mgorth nproc rectangle |
| 12709 | 192 |
| 193 ** The get_forge_pkg function is now private. | |
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194 |
| 12709 | 195 ** The rectangle_lw, rectangle_sw, triangle_lw, and triangle_sw |
| 196 functions are now private. | |
| 197 | |
| 198 ** The logistic_regression_derivatives and logistic_regression_likelihood | |
| 199 functions are now private. | |
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200 |
| 12739 | 201 ** ChangeLog files in the Octave sources are no longer maintained |
| 202 by hand. Instead, there is a single ChangeLog file generated from | |
| 203 the Mercurial version control commit messages. Older ChangeLog | |
| 204 information can be found in the etc/OLD-ChangeLogs directory in the | |
| 205 source distribution. | |
| 206 | |
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207 Summary of important user-visible changes for version 3.4: |
| 9352 | 208 --------------------------------------------------------- |
| 209 | |
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210 ** BLAS and LAPACK libraries are now required to build Octave. The |
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211 subset of the reference BLAS and LAPACK libraries has been removed |
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212 from the Octave sources. |
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213 |
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214 ** The ARPACK library is now distributed with Octave so it no longer |
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215 needs to be available as an external dependency when building |
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216 Octave. |
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217 |
| 10118 | 218 ** The `lookup' function was extended to be more useful for |
| 219 general-purpose binary searching. Using this improvement, the | |
| 220 ismember function was rewritten for significantly better | |
| 221 performance. | |
| 9352 | 222 |
| 223 ** Real, integer and logical matrices, when used in indexing, will now | |
| 224 cache the internal index_vector value (zero-based indices) when | |
| 225 successfully used as indices, eliminating the conversion penalty for | |
| 10118 | 226 subsequent indexing by the same matrix. In particular, this means it |
| 227 is no longer needed to avoid repeated indexing by logical arrays | |
| 228 using find for performance reasons. | |
| 9888 | 229 |
| 10118 | 230 ** Logical matrices are now treated more efficiently when used as |
| 231 indices. Octave will keep the index as a logical mask unless the | |
| 232 ratio of true elements is small enough, using a specialized | |
| 233 code. Previously, all logical matrices were always first converted | |
| 234 to index vectors. This results in savings in both memory and | |
| 235 computing time. | |
| 9480 | 236 |
| 10118 | 237 ** The `sub2ind' and `ind2sub' functions were reimplemented as compiled |
| 238 functions for better performance. These functions are now faster, | |
| 239 can deliver more economized results for ranges, and can reuse the | |
| 240 index cache mechanism described in previous paragraph. | |
| 241 | |
| 242 ** The built-in function equivalents to associative operators (`plus', | |
| 243 `times', `mtimes', `and', and `or') have been extended to accept | |
| 244 multiple arguments. This is especially useful for summing | |
| 245 (multiplying, etc.) lists of objects (of possibly distinct types): | |
| 9408 | 246 |
| 9449 | 247 matrix_sum = plus (matrix_list{:}); |
| 248 | |
| 10118 | 249 ** An FTP object type based on libcurl has been implemented. These |
| 250 objects allow ftp connections, downloads and uploads to be | |
| 251 managed. For example, | |
| 9880 | 252 |
| 10118 | 253 fp = ftp ("ftp.octave.org); |
| 254 cd (fp, "gnu/octave"); | |
| 255 mget (fp, "octave-3.2.3.tar.bz2"); | |
| 256 close (fp); | |
| 9880 | 257 |
| 10118 | 258 ** The default behavior of `assert (observed, expected)' has been |
| 259 relaxed to employ less strict checking that does not require the | |
| 260 internals of the values to match. This avoids previously valid | |
| 261 tests from breaking due to new internal classes introduced in future | |
| 262 Octave versions. | |
| 9449 | 263 |
| 264 For instance, all of these assertions were true in Octave 3.0.x | |
| 265 but false in 3.2.x due to new optimizations and improvements: | |
| 266 | |
| 267 assert (2*linspace (1, 5, 5), 2*(1:5)) | |
| 268 assert (zeros (0, 0), []) | |
| 269 assert (2*ones (1, 5), (2) (ones (1,5))) | |
| 9462 | 270 |
| 10118 | 271 ** The behavior of library functions `ismatrix', `issquare', and |
| 272 `issymmetric' has been changed for better consistency. | |
| 9873 | 273 |
| 10292 | 274 * The `ismatrix' function now returns true for all numeric, |
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275 logical and character 2-D or N-D matrices. Previously, `ismatrix' |
| 10292 | 276 returned false if the first or second dimension was zero. |
| 277 Hence, `ismatrix ([])' was false, | |
| 278 while `ismatrix (zeros (1,2,0))' was true. | |
| 9873 | 279 |
| 10118 | 280 * The `issquare' function now returns a logical scalar, and is |
| 281 equivalent to the expression | |
| 282 | |
| 283 ismatrix (x) && ndims (x) == 2 && rows (x) == columns (x) | |
| 284 | |
| 285 The dimension is no longer returned. As a result, `issquare ([])' | |
| 286 now yields true. | |
| 9873 | 287 |
| 10118 | 288 * The `issymmetric' function now checks for symmetry instead of |
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289 Hermitianness. For the latter, ishermitian was created. Also, |
| 10118 | 290 logical scalar is returned rather than the dimension, so |
| 291 `issymmetric ([])' is now true. | |
| 9873 | 292 |
| 10118 | 293 ** Function handles are now aware of overloaded functions. If a |
| 294 function is overloaded, the handle determines at the time of its | |
| 295 reference which function to call. A non-overloaded version does not | |
| 296 need to exist. | |
| 9873 | 297 |
| 10118 | 298 ** Overloading functions for built-in classes (double, int8, cell, |
| 299 etc.) is now compatible with Matlab. | |
| 9408 | 300 |
| 10323 | 301 ** Function handles can now be compared with the == and != operators, |
| 302 as well as the `isequal' function. | |
| 303 | |
| 10118 | 304 ** Performance of concatenation (using []) and the functions `cat', |
| 305 `horzcat', and `vertcat' has been improved for multidimensional | |
| 306 arrays. | |
| 10117 | 307 |
| 9547 | 308 ** The operation-assignment operators +=, -=, *= and /= now behave more |
| 10118 | 309 efficiently in certain cases. For instance, if M is a matrix and S a |
| 310 scalar, then the statement | |
| 9547 | 311 |
| 10118 | 312 M += S; |
| 9547 | 313 |
| 10118 | 314 will operate on M's data in-place if it is not shared by another |
| 315 variable, usually increasing both time and memory efficiency. | |
| 9547 | 316 |
| 9558 | 317 Only selected common combinations are affected, namely: |
| 9547 | 318 |
| 319 matrix += matrix | |
| 320 matrix -= matrix | |
| 9558 | 321 matrix .*= matrix |
| 322 matrix ./= matrix | |
| 323 | |
| 9547 | 324 matrix += scalar |
| 325 matrix -= scalar | |
| 326 matrix *= scalar | |
| 327 matrix /= scalar | |
| 9558 | 328 |
| 9552 | 329 logical matrix |= logical matrix |
| 330 logical matrix &= logical matrix | |
| 9547 | 331 |
| 10118 | 332 where matrix and scalar belong to the same class. The left-hand |
| 333 side must be a simple variable reference. | |
| 9888 | 334 |
| 10118 | 335 Moreover, when unary operators occur in expressions, Octave will |
| 336 also try to do the operation in-place if it's argument is a | |
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337 temporary expression. |
| 9589 | 338 |
| 10118 | 339 ** The effect of comparison operators (<, >, <=, and >=) applied to |
| 340 complex numbers has changed to be consistent with the strict | |
| 341 ordering defined by the `max', `min', and `sort' functions. More | |
| 342 specifically, complex numbers are compared by lexicographical | |
| 343 comparison of the pairs `[abs(z), arg(z)]'. Previously, only real | |
| 344 parts were compared; this can be trivially achieved by wrapping the | |
| 345 operands in real(). | |
| 9547 | 346 |
| 10118 | 347 ** The automatic simplification of complex computation results has |
| 348 changed. Octave will now simplify any complex number with a zero | |
| 349 imaginary part or any complex matrix with all elements having zero | |
| 350 imaginary part to a real value. Previously, this was done only for | |
| 351 positive zeros. Note that the behavior of the complex function is | |
| 352 unchanged and it still produces a complex value even if the | |
| 353 imaginary part is zero. | |
| 9826 | 354 |
| 10118 | 355 ** As a side effect of code refactoring in liboctave, the binary |
| 356 logical operations are now more easily amenable to compiler | |
| 357 optimizations and are thus significantly faster. | |
| 9595 | 358 |
| 10118 | 359 ** Octave now allows user-defined `subsasgn' methods to optimize out |
| 360 redundant copies. For more information, see the manual. | |
| 9595 | 361 |
| 10453 | 362 ** More efficient matrix division handling. Octave is now able to |
| 10118 | 363 handle the expressions |
| 9664 | 364 |
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365 M' \ V |
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366 M.' \ V |
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367 V / M |
| 9664 | 368 |
| 10118 | 369 (M is a matrix and V is a vector) more efficiently in certain cases. |
| 370 In particular, if M is triangular, all three expressions will be | |
| 371 handled by a single call to xTRTRS (from LAPACK), with appropriate | |
| 10453 | 372 flags. Previously, all three expressions required a physical |
| 10118 | 373 transpose of M. |
| 9664 | 374 |
| 10118 | 375 ** More efficient handling of certain mixed real-complex matrix |
| 376 operations. For instance, if RM is a real matrix and CM a complex | |
| 377 matrix, | |
| 9664 | 378 |
| 10118 | 379 RM * CM |
| 9664 | 380 |
| 381 can now be evaluated either as | |
| 382 | |
| 383 complex (RM * real (CM), RM * imag (CM)) | |
| 384 | |
| 385 or as | |
| 386 | |
| 387 complex (RM) * CM, | |
| 388 | |
| 10453 | 389 depending on the dimensions. The first form requires more |
| 390 temporaries and copying, but halves the FLOP count, which normally | |
| 391 brings better performance if RM has enough rows. Previously, the | |
| 392 second form was always used. | |
| 9664 | 393 |
| 11111 | 394 Matrix division is similarly affected. |
| 9664 | 395 |
| 10118 | 396 ** More efficient handling of triangular matrix factors returned from |
| 397 factorizations. The functions for computing QR, LU and Cholesky | |
| 398 factorizations will now automatically return the triangular matrix | |
| 399 factors with proper internal matrix_type set, so that it won't need | |
| 400 to be computed when the matrix is used for division. | |
| 9717 | 401 |
| 10118 | 402 ** The built-in `sum' function now handles the non-native summation |
| 403 (i.e., double precision sum of single or integer inputs) more | |
| 404 efficiently, avoiding a temporary conversion of the whole input | |
| 405 array to doubles. Further, `sum' can now accept an extra option | |
| 406 argument, using a compensated summation algorithm rather than a | |
| 407 straightforward sum, which significantly improves precision if lots | |
| 408 of cancellation occurs in the summation. | |
| 9717 | 409 |
| 10118 | 410 ** The built-in `bsxfun' function now uses optimized code for certain |
| 411 cases where built-in operator handles are passed in. Namely, the | |
| 412 optimizations concern the operators `plus', `minus', `times', | |
| 413 `ldivide', `rdivide', `power', `and', `or' (for logical arrays), | |
| 414 the relational operators `eq', `ne', `lt', `le', `gt', `ge', and the | |
| 415 functions `min' and `max'. Optimizations only apply when both | |
| 416 operands are of the same built-in class. Mixed real/complex and | |
| 417 single/double operations will first convert both operands to a | |
| 418 common type. | |
| 9745 | 419 |
| 10118 | 420 ** The `strfind' and `strrep' functions now have compiled |
| 421 implementations, facilitating significantly more efficient searching | |
| 422 and replacing in strings, especially with longer patterns. The code | |
| 423 of `strcat' has been vectorized and is now much more efficient when | |
| 424 many strings are concatenated. The `strcmpi' and `strncmpi' | |
| 425 functions are now built-in functions, providing better performance. | |
|
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426 |
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427 ** 'str2double' now has a compiled implementation and the API conforms |
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428 to Matlab. The additional Octave-specific features of returning a |
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429 boolean matrix indicating which elements were successfully converted |
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430 has been removed. |
| 10208 | 431 |
| 10453 | 432 ** Matlab-style ignoring input and output function arguments using |
| 11111 | 433 tilde (~) is now supported. Ignored output arguments may be |
| 434 detected from a function using the built-in function `isargout'. | |
| 435 For more details, consult the manual. | |
| 10886 | 436 |
| 10453 | 437 ** The list datatype, deprecated since the introduction of cells, has |
| 438 been removed. | |
| 10276 | 439 |
| 10453 | 440 ** The accumarray function has been optimized and is now significantly |
| 441 faster in certain important cases. | |
| 10054 | 442 |
| 10292 | 443 ** The behavior of isreal and isnumeric functions was changed to be more |
| 444 Matlab-compatible. | |
| 445 | |
| 10406 | 446 ** The integer math & conversion warnings (Octave:int-convert-nan, |
| 447 Octave:int-convert-non-int-val, Octave:int-convert-overflow, | |
| 11111 | 448 Octave:int-math-overflow) have been removed. |
| 10406 | 449 |
| 10453 | 450 ** rem and mod are now built-in functions. They also handle integer |
| 451 types efficiently using integer arithmetic. | |
| 10437 | 452 |
| 10536 | 453 ** Sparse indexing and indexed assignment has been mostly rewritten. |
| 454 Since Octave uses compressed column storage for sparse matrices, | |
| 455 major attention is devoted to operations manipulating whole columns. | |
| 456 Such operations are now significantly faster, as well as some other | |
| 457 important cases. | |
| 458 | |
| 459 Further, it is now possible to pre-allocate a sparse matrix and | |
| 460 subsequently fill it by assignments, provided they meet certain | |
| 461 conditions. For more information, consult the `spalloc' function, | |
| 462 which is no longer a mere dummy. Consequently, nzmax and nnz are no | |
| 11111 | 463 longer always equal in Octave. Octave may also produce a matrix |
| 464 with nnz < nzmax as a result of other operations, so you should | |
| 465 consistently use nnz unless you really want to use nzmax (i.e. the | |
| 466 space allocated for nonzero elements). | |
| 10536 | 467 |
| 468 Sparse concatenation is also affected, and concatenating sparse | |
| 469 matrices, especially larger collections, is now significantly more | |
| 11111 | 470 efficient. This applies to both the [] operator and the |
| 10536 | 471 cat/vertcat/horzcat functions. |
| 472 | |
| 11111 | 473 ** It is now possible to optionally employ the xGESDD LAPACK drivers |
| 474 for computing the singular value decomposition using svd(), instead | |
| 475 of the default xGESVD, using the configuration pseudo-variable | |
| 476 svd_driver. The xGESDD driver can be up to 6x times faster when | |
| 477 singular vectors are requested, but is reported to be somewhat less | |
| 10639 | 478 robust on highly ill-conditioned matrices. |
| 479 | |
| 480 ** Configuration pseudo-variables, such as page_screen_output or | |
| 481 confirm_recursive_rmdir (or the above mentioned svd_driver), now | |
| 482 accept a "local" option as second argument, requesting the change | |
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483 to be undone when the current function returns: |
| 10639 | 484 |
| 485 function [status, msg] = rm_rf (dir) | |
| 486 confirm_recursive_rmdir (false, "local"); | |
| 487 [status, msg] = rmdir (dir, "s"); | |
| 488 ... | |
| 489 endfunction | |
| 490 | |
| 491 Upon return, confirm_recursive_rmdir will be restored to the value | |
| 492 it had on entry to the function, even if there were subsequent | |
| 493 changes to the variable in function rm_rf or any of the functions | |
| 494 it calls. | |
| 495 | |
| 11111 | 496 ** pkg now accepts a -forge option for downloading and installing |
| 497 packages from Octave Forge automatically. For example, | |
| 10774 | 498 |
| 499 pkg install -forge general | |
| 500 | |
| 11111 | 501 will automatically download the latest release of the general |
| 502 package and attempt to install it. No automatic resolving of | |
| 503 dependencies is provided. Further, | |
| 10639 | 504 |
| 10774 | 505 pkg list -forge |
| 506 | |
| 507 can be used to list all available packages. | |
| 508 | |
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509 ** The internal data representation of structs has been completely |
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510 rewritten to make certain optimizations feasible. The field data |
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511 can now be shared between structs with equal keys but different |
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512 dimensions or values, making operations that preserve the fields |
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513 faster. Economized storage is now used for scalar structs (just |
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514 like most other scalars), making their usage more |
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515 memory-efficient. Certain array-like operations on structs |
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516 (concatenation, uniform cellfun, num2cell) have gained a |
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517 significant speed-up. Additionally, the octave_scalar_map class |
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518 now provides a simpler interface to work with scalar structs within |
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519 a C++ DLD function. |
| 10639 | 520 |
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521 ** Two new formats are available for displaying numbers: |
| 11111 | 522 |
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523 format short eng |
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524 format long eng |
| 11111 | 525 |
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526 Both display numbers in engineering notation, i.e., mantissa + |
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527 exponent where the exponent is a multiple of 3. |
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528 |
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529 ** The following functions are new in Octave 3.4: |
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530 accumdim erfcx nfields pqpnonneg uigetdir |
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531 bitpack fileread nth_element quadcc uigetfile |
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532 bitunpack fminbnd onCleanup randi uiputfile |
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533 blkmm fskipl pbaspect repelems uimenu |
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534 cbrt ifelse pie3 reset whitebg |
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535 curl ishermitian powerset rsf2csf |
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536 chop isindex ppder saveas |
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537 daspect luupdate ppint strread |
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538 divergence merge ppjumps textread |
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539 |
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540 ** Using the image function to view images with external programs such |
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541 as display, xv, and xloadimage is no longer supported. The |
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542 image_viewer function has also been removed. |
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543 |
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544 ** The behavior of struct assignments to non-struct values has been |
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545 changed. Previously, it was possible to overwrite an arbitrary |
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546 value: |
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547 |
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548 a = 1; |
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549 a.x = 2; |
| 10873 | 550 |
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551 This is no longer possible unless a is an empty matrix or cell |
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552 array. |
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553 |
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554 ** The dlmread function has been extended to allow specifying a custom |
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555 value for empty fields. |
| 10829 | 556 |
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557 ** The dlmread and dlmwrite functions have been modified to accept |
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558 file IDs (as returned by fopen) in addition to file names. |
| 11111 | 559 |
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560 ** Octave can now optimize away the interpreter overhead of an |
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561 anonymous function handle, if the function simply calls another |
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562 function or handle with some of its parameters bound to certain |
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563 values. Example: |
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564 |
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565 f = @(x) sum (x, 1); |
| 10966 | 566 |
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567 When f is called, the call is forwarded to @sum with the constant 1 |
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568 appended, and the anonymous function call does not occur on the |
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569 call stack. |
| 10829 | 570 |
| 12424 | 571 ** For compatibility with Matlab, mu2lin (x) is now equivalent to |
| 572 mu2lin (x, 0). | |
| 573 | |
| 574 ** The new function `history_control' may be used to control the way | |
| 575 command lines are added to the history list when Octave is using | |
| 576 readline for command-line editing. For example | |
| 577 | |
| 578 history_control ("ignoredups") | |
| 579 | |
| 580 tells Octave to avoid adding duplicate lines to the history list. | |
| 581 | |
| 582 ** Octave now uses the gnulib library for improved portability and to | |
| 583 avoid bugs in operating system functions. | |
| 584 | |
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585 ** Deprecated functions. |
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586 |
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587 The following functions were deprecated in Octave 3.0 and have been |
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588 removed from Octave 3.4. |
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589 |
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590 beta_cdf geometric_pdf pascal_pdf |
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591 beta_inv geometric_rnd pascal_rnd |
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592 beta_pdf hypergeometric_cdf poisson_cdf |
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593 beta_rnd hypergeometric_inv poisson_inv |
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594 binomial_cdf hypergeometric_pdf poisson_pdf |
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595 binomial_inv hypergeometric_rnd poisson_rnd |
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596 binomial_pdf intersection polyinteg |
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597 binomial_rnd is_bool setstr |
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598 chisquare_cdf is_complex struct_contains |
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599 chisquare_inv is_list struct_elements |
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|
600 chisquare_pdf is_matrix t_cdf |
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601 chisquare_rnd is_scalar t_inv |
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602 clearplot is_square t_pdf |
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603 clg is_stream t_rnd |
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604 com2str is_struct uniform_cdf |
|
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605 exponential_cdf is_symmetric uniform_inv |
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606 exponential_inv is_vector uniform_pdf |
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607 exponential_pdf isstr uniform_rnd |
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608 exponential_rnd lognormal_cdf weibcdf |
|
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609 f_cdf lognormal_inv weibinv |
|
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610 f_inv lognormal_pdf weibpdf |
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611 f_pdf lognormal_rnd weibrnd |
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612 f_rnd meshdom weibull_cdf |
|
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613 gamma_cdf normal_cdf weibull_inv |
|
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|
614 gamma_inv normal_inv weibull_pdf |
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615 gamma_pdf normal_pdf weibull_rnd |
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616 gamma_rnd normal_rnd wiener_rnd |
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|
617 geometric_cdf pascal_cdf |
|
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618 geometric_inv pascal_inv |
|
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|
619 |
|
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620 The following functions were deprecated in Octave 3.2 and will |
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621 be removed from Octave 3.6 (or whatever version is the second major |
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622 release after 3.2): |
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623 |
|
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624 create_set spcholinv splu |
|
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625 dmult spcumprod spmax |
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626 iscommand spcumsum spmin |
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627 israwcommand spdet spprod |
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628 lchol spdiag spqr |
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629 loadimage spfind spsum |
|
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630 mark_as_command sphcat spsumsq |
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631 mark_as_rawcommand spinv spvcat |
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632 spatan2 spkron str2mat |
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633 spchol splchol unmark_command |
|
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634 spchol2inv split unmark_rawcommand |
|
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635 |
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636 The following functions have been deprecated in Octave 3.4 and will |
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637 be removed from Octave 3.8 (or whatever version is the second major |
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638 release after 3.4): |
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|
639 |
|
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640 autocor cellidx gammai krylovb saveimage |
|
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641 autocov dispatch glpkmex perror strerror |
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642 betai fstat is_global replot values |
|
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643 |
|
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|
644 Summary of important user-visible changes for version 3.2: |
| 5913 | 645 --------------------------------------------------------- |
| 2452 | 646 |
| 8737 | 647 ** Compatibility with Matlab graphics has been improved. |
| 6329 | 648 |
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649 The hggroup object and associated listener callback functions have |
| 8737 | 650 been added allowing the inclusion of group objects. Data sources |
|
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651 have been added to these group objects such that |
|
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652 |
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653 x = 0:0.1:10; |
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654 y = sin (x); |
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655 plot (x, y, "ydatasource", "y"); |
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656 for i = 1 : 100 |
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657 pause(0.1) |
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658 y = sin (x + 0.1 * i); |
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659 refreshdata(); |
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660 endfor |
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661 |
| 8737 | 662 works as expected. This capability has be used to introduce |
|
9031
1052a66078cf
Documentation cleanup of top-level Octave directory (READMEs, INSTALL)
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|
663 stem-series, bar-series, etc., objects for better Matlab |
| 8737 | 664 compatibility. |
| 665 | |
| 666 ** New graphics functions: | |
| 667 | |
|
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668 addlistener ezcontour gcbo refresh |
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669 addproperty ezcontourf ginput refreshdata |
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670 allchild ezmesh gtext specular |
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671 available_graphics_toolkits ezmeshc intwarning surfl |
|
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672 graphics_toolkit ezplot ishghandle trisurf |
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673 cla ezplot3 isocolors waitforbuttonpress |
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674 clabel ezpolar isonormals |
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675 comet ezsurf isosurface |
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676 dellistener findall linkprop |
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677 diffuse gcbf plotmatrix |
|
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678 |
| 8737 | 679 ** New experimental OpenGL/FLTK based plotting system. |
| 680 | |
| 681 An experimental plotting system based on OpenGL and the FLTK | |
|
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|
682 toolkit is now part of Octave. This graphics toolkit is disabled by |
| 8737 | 683 default. You can switch to using it with the command |
|
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684 |
|
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|
685 graphics_toolkit ("fltk") |
|
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|
686 |
|
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687 for all future figures or for a particular figure with the command |
|
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688 |
|
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|
689 graphics_toolkit (h, "fltk") |
|
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690 |
| 11139 | 691 where "h" is a valid figure handle. |
|
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|
692 |
| 8737 | 693 ** Functions providing direct access to gnuplot have been removed. |
| 694 | |
|
7990
86dae6e5b83c
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|
695 The functions __gnuplot_plot__, __gnuplot_set__, __gnuplot_raw__, |
|
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|
696 __gnuplot_show__, __gnuplot_replot__, __gnuplot_splot__, |
| 8737 | 697 __gnuplot_save_data__ and __gnuplot_send_inline_data__ have been |
| 698 removed from Octave. These function were incompatible with the | |
| 699 high level graphics handle code. | |
| 6329 | 700 |
| 8885 | 701 ** The Control, Finance and Quaternion functions have been removed. |
| 702 | |
| 703 These functions are now available as separate packages from | |
| 704 | |
| 705 http://octave.sourceforge.net/packages.html | |
| 706 | |
| 707 and can be reinstalled using the Octave package manager (see | |
| 708 the pkg function). | |
| 709 | |
| 710 ** Specific sparse matrix functions removed. | |
| 711 | |
| 712 The following functions, which handled only sparse matrices have | |
| 713 been removed. Instead of calling these functions directly, you | |
| 714 should use the corresponding function without the "sp" prefix. | |
| 8737 | 715 |
| 8885 | 716 spatan2 spcumsum spkron spprod |
| 717 spchol spdet splchol spqr | |
| 718 spchol2inv spdiag splu spsum | |
| 719 spcholinv spfind spmax spsumsqk | |
| 720 spcumprod spinv spmin | |
| 721 | |
| 722 ** Improvements to the debugger. | |
| 723 | |
| 724 The interactive debugging features have been improved. Stopping | |
| 725 on statements with dbstop should work correctly now. Stepping | |
| 726 into and over functions, and stepping one statement at a time | |
| 727 (with dbstep) now works. Moving up and down the call stack with | |
| 728 dbup and dbdown now works. The dbstack function is now available | |
| 729 to print the current function call stack. The new dbquit function | |
| 730 is available to exit the debugging mode. | |
| 731 | |
| 732 ** Improved traceback error messages. | |
| 733 | |
| 734 Traceback error messages are much more concise and easier to | |
| 735 understand. They now display information about the function call | |
| 736 stack instead of the stack of all statements that were active at | |
| 737 the point of the error. | |
|
8014
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diff
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|
738 |
| 8737 | 739 ** Object Oriented Programming. |
|
8405
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8396
diff
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|
740 |
| 8737 | 741 Octave now includes OOP features and the user can create their own |
| 742 class objects and overloaded functions and operators. For | |
| 743 example, all methods of a class called "myclass" will be found in | |
| 744 a directory "@myclass" on the users path. The class specific | |
| 745 versions of functions and operators take precedence over the | |
| 746 generic versions of these functions. | |
| 747 | |
| 748 New functions related to OOP include | |
| 7189 | 749 |
| 8737 | 750 class inferiorto isobject loadobj methods superiorto |
| 751 | |
| 752 See the Octave manual for more details. | |
| 7038 | 753 |
| 8747 | 754 ** Parsing of Command-style Functions. |
| 755 | |
| 756 Octave now parses command-style functions without needing to first | |
| 757 declare them with "mark_as_command". The rules for recognizing a | |
| 758 command-style function calls are | |
| 759 | |
| 760 * A command must appear as the first word in a statement, | |
| 761 followed by a space. | |
| 762 | |
| 763 * The first character after the space must not be '=' or '(' | |
| 764 | |
| 765 * The next token after the space must not look like a binary | |
| 766 operator. | |
| 767 | |
| 768 These rules should be mostly compatible with the way Matlab parses | |
| 769 command-style function calls and allow users to define commands in | |
| 770 .m files without having to mark them as commands. | |
| 771 | |
| 772 Note that previous versions of Octave allowed expressions like | |
| 773 | |
| 774 x = load -text foo.dat | |
| 775 | |
| 776 but an expression like this will now generate a parse error. In | |
| 777 order to assign the value returned by a function to a variable, | |
| 778 you must use the normal function call syntax: | |
| 779 | |
| 780 x = load ("-text", "foo.dat"); | |
| 781 | |
| 8737 | 782 ** Block comments. |
| 783 | |
| 8747 | 784 Commented code can be between matching "#{" and "#}" or "%{" and |
| 785 "%}" markers, even if the commented code spans several line. This | |
| 786 allows blocks code to be commented, without needing to comment | |
| 787 each line. For example, | |
| 5814 | 788 |
| 8747 | 789 function [s, t] = func (x, y) |
| 790 s = 2 * x; | |
| 791 #{ | |
| 792 s *= y; | |
| 793 t = y + x; | |
| 794 #} | |
|
7990
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|
795 endfunction |
| 5814 | 796 |
| 8747 | 797 the lines "s *= y;" and "t = y + x" will not be executed. |
| 8737 | 798 |
|
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799 ** If any subfunction in a file ends with "end" or "endfunction", then |
|
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|
800 they all must end that way. Previously, Octave accepted |
|
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|
801 |
|
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|
802 function main () |
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803 ... |
|
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|
804 # no endfunction here. |
|
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|
805 function sub () |
|
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|
806 ... |
|
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|
807 endfunction |
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808 |
|
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|
809 but this is no longer allowed. |
|
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|
810 |
| 8737 | 811 ** Special treatment in the parser of expressions like "a' * b". |
| 2452 | 812 |
| 8737 | 813 In these cases the transpose is no longer explicitly formed and |
| 814 BLAS libraries are called with the transpose flagged, | |
| 815 significantly improving performance for these kinds of | |
| 816 operations. | |
|
8417
654bcfb937bf
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David Bateman <dbateman@free.fr>
parents:
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diff
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|
817 |
| 8737 | 818 ** Single Precision data type. |
| 2452 | 819 |
| 8737 | 820 Octave now includes a single precision data type. Single |
| 821 precision variables can be created with the "single" command, or | |
|
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52515efc50c0
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diff
changeset
|
822 from functions like ones, eye, etc. For example, |
| 5995 | 823 |
| 8737 | 824 single (1) |
| 825 ones (2, 2, "single") | |
| 826 zeros (2, 2, "single") | |
| 827 eye (2, 2, "single") | |
| 828 Inf (2, 2, "single") | |
| 829 NaN (2, 2, "single") | |
| 830 NA (2, 2, "single") | |
| 7279 | 831 |
| 8737 | 832 all create single precision variables. For compatibility with |
| 833 Matlab, mixed double/single precision operators and functions | |
| 834 return single precision types. | |
| 835 | |
| 836 As a consequence of this addition to Octave the internal | |
|
7990
86dae6e5b83c
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David Bateman <dbateman@free.fr>
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7279
diff
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|
837 representation of the double precision NA value has changed, and |
|
86dae6e5b83c
Initial update of NEWS for 3.2 release
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|
838 so users that make use of data generated by Octave with R or |
|
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diff
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|
839 visa-versa are warned that compatibility might not be assured. |
| 7279 | 840 |
| 8737 | 841 ** Improved array indexing. |
| 842 | |
| 843 The underlying code used for indexing of arrays has been | |
|
9034
52515efc50c0
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diff
changeset
|
844 completely rewritten and indexing is now significantly faster. |
| 8737 | 845 |
| 8755 | 846 ** Improved memory management. |
| 847 | |
| 848 Octave will now attempt to share data in some cases where previously | |
| 849 a copy would be made, such as certain array slicing operations or | |
|
9031
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|
850 conversions between cells, structs and cs-lists. This usually reduces |
| 8755 | 851 both time and memory consumption. |
| 9128 | 852 Also, Octave will now attempt to detect and optimize usage of a vector |
| 853 as a stack, when elements are being repeatedly inserted at/removed from | |
| 854 the end of the vector. | |
| 8755 | 855 |
| 8738 | 856 ** Improved performance for reduction operations. |
| 857 | |
| 8755 | 858 The performance of the sum, prod, sumsq, cumsum, cumprod, any, all, |
| 859 max and min functions has been significantly improved. | |
| 8738 | 860 |
| 9006 | 861 ** Sorting and searching. |
| 862 | |
| 863 The performance of sort has been improved, especially when sorting | |
| 10453 | 864 indices are requested. An efficient built-in issorted |
| 865 implementation was added. The sortrows function now uses a more | |
|
12702
013cd94d8d7f
doc: Spelling fixes for various documentation files
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|
866 efficient algorithm, especially in the homogeneous case. The lookup |
| 10453 | 867 function is now a built-in function performing a binary search, |
| 868 optimized for long runs of close elements. Lookup also works with | |
| 869 cell arrays of strings. | |
| 9006 | 870 |
| 871 ** Range arithmetics | |
| 872 | |
| 10453 | 873 For some operations on ranges, Octave will attempt to keep the |
| 874 result as a range. These include negation, adding a scalar, | |
| 875 subtracting a scalar, and multiplying by a scalar. Ranges with zero | |
| 876 increment are allowed and can be constructed using the built-in | |
| 877 function `ones'. | |
| 9006 | 878 |
| 879 ** Various performance improvements. | |
| 880 | |
| 10453 | 881 Performance of a number of other built-in operations and functions |
| 882 was improved, including: | |
| 9006 | 883 |
| 884 * logical operations | |
| 885 * comparison operators | |
| 886 * element-wise power | |
| 887 * accumarray | |
| 888 * cellfun | |
| 889 * isnan | |
| 890 * isinf | |
| 891 * isfinite | |
| 892 * nchoosek | |
| 893 * repmat | |
| 894 * strcmp | |
| 895 | |
| 8737 | 896 ** 64-bit integer arithmetic. |
| 897 | |
| 898 Arithmetic with 64-bit integers (int64 and uint64 types) is fully | |
| 899 supported, with saturation semantics like the other integer types. | |
| 900 Performance of most integer arithmetic operations has been | |
| 901 improved by using integer arithmetic directly. Previously, Octave | |
| 902 performed integer math with saturation semantics by converting the | |
| 903 operands to double precision, performing the operation, and then | |
| 904 converting the result back to an integer value, truncating if | |
| 905 necessary. | |
| 906 | |
| 8885 | 907 ** Diagonal and permutation matrices. |
| 908 | |
| 909 The interpreter can now treat diagonal and permutation matrices as | |
| 910 special objects that store only the non-zero elements, rather than | |
| 911 general full matrices. Therefore, it is now possible to construct | |
| 912 and use these matrices in linear algebra without suffering a | |
| 913 performance penalty due to storing large numbers of zero elements. | |
| 914 | |
| 915 ** Improvements to fsolve. | |
| 916 | |
| 917 The fsolve function now accepts an option structure argument (see | |
| 918 also the optimset function). The INFO values returned from fsolve | |
| 919 have changed to be compatible with Matlab's fsolve function. | |
| 920 Additionally, fsolve is now able to solve overdetermined systems, | |
| 921 complex-differentiable complex systems, systems with a sparse | |
| 922 jacobian and can work in single precision if given single precision | |
|
9031
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|
923 inputs. It can also be called recursively. |
| 8885 | 924 |
| 8737 | 925 ** Improvements to the norm function. |
| 926 | |
| 927 The norm function is now able to compute row or column norms of a | |
| 928 matrix in a single call, as well as general matrix p-norms. | |
| 929 | |
| 930 ** New functions for computing some eigenvalues or singular values. | |
| 931 | |
| 932 The eigs and svds functions have been included in Octave. These | |
| 933 functions require the ARPACK library (now distributed under a | |
| 934 GPL-compatible license). | |
| 935 | |
| 936 ** New QR and Cholesky factorization updating functions. | |
|
8370
34960ba08a81
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Jaroslav Hajek <highegg@gmail.com>
parents:
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|
937 |
| 8737 | 938 choldelete cholshift qrdelete qrshift |
| 939 cholinsert cholupdate qrinsert qrupdate | |
| 940 | |
| 941 ** New quadrature functions. | |
| 942 | |
| 943 dblquad quadgk quadv triplequad | |
| 944 | |
| 8885 | 945 ** New functions for reading and writing images. |
| 946 | |
| 947 The imwrite and imread functions have been included in Octave. | |
| 948 These functions require the GraphicsMagick library. The new | |
| 949 function imfinfo provides information about an image file (size, | |
| 950 type, colors, etc.) | |
| 951 | |
|
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952 ** The input_event_hook function has been replaced by the pair of |
|
1500d0197484
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|
953 functions add_input_event_hook and remove_input_event_hook so that |
|
1500d0197484
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|
954 more than one hook function may be installed at a time. |
|
1500d0197484
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|
955 |
| 8737 | 956 ** Other miscellaneous new functions. |
|
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|
957 |
|
8932
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|
958 addtodate hypot reallog |
|
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|
959 bicgstab idivide realpow |
| 9006 | 960 cellslices info realsqrt |
| 961 cgs interp1q rectint | |
| 962 command_line_path isdebugmode regexptranslate | |
| 963 contrast isfloat restoredefaultpath | |
| 964 convn isstrprop roundb | |
| 965 cummin log1p rundemos | |
| 966 cummax lsqnonneg runlength | |
| 967 datetick matlabroot saveobj | |
| 968 display namelengthmax spaugment | |
| 969 expm1 nargoutchk strchr | |
| 970 filemarker pathdef strvcat | |
| 971 fstat perl subspace | |
| 972 full prctile symvar | |
| 973 fzero quantile treelayout | |
| 974 genvarname re_read_readline_init_file validatestring | |
| 975 histc | |
|
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diff
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|
976 |
| 8885 | 977 ** Changes to strcat. |
| 978 | |
| 979 The strcat function is now compatible with Matlab's strcat | |
| 980 function, which removes trailing whitespace when concatenating | |
| 981 character strings. For example | |
| 982 | |
| 983 strcat ('foo ', 'bar') | |
| 984 ==> 'foobar' | |
| 985 | |
| 986 The new function cstrcat provides the previous behavior of | |
| 987 Octave's strcat. | |
| 988 | |
| 989 ** Improvements to the help functions. | |
| 990 | |
|
9034
52515efc50c0
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|
991 The help system has been mostly re-implemented in .m files to make |
| 8885 | 992 it easier to modify. Performance of the lookfor function has been |
| 993 greatly improved by caching the help text from all functions that | |
| 994 are distributed with Octave. The pkg function has been modified | |
| 995 to generate cache files for external packages when they are | |
| 996 installed. | |
| 997 | |
|
8888
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998 ** Deprecated functions. |
|
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|
999 |
|
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|
1000 The following functions were deprecated in Octave 3.0 and will be |
|
11112
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1001 removed from Octave 3.4 (or whatever version is the second major |
|
8888
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|
1002 release after 3.0): |
|
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|
1003 |
|
11112
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1004 beta_cdf geometric_pdf pascal_pdf |
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|
1005 beta_inv geometric_rnd pascal_rnd |
|
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1006 beta_pdf hypergeometric_cdf poisson_cdf |
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1007 beta_rnd hypergeometric_inv poisson_inv |
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1008 binomial_cdf hypergeometric_pdf poisson_pdf |
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1009 binomial_inv hypergeometric_rnd poisson_rnd |
|
8ea4cf59c41b
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1010 binomial_pdf intersection polyinteg |
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1011 binomial_rnd is_bool setstr |
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|
1012 chisquare_cdf is_complex struct_contains |
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8ea4cf59c41b
list deprecated and removed functions in NEWS file
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|
1013 chisquare_inv is_list struct_elements |
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8ea4cf59c41b
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|
1014 chisquare_pdf is_matrix t_cdf |
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|
1015 chisquare_rnd is_scalar t_inv |
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parents:
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1016 clearplot is_square t_pdf |
|
8ea4cf59c41b
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|
1017 clg is_stream t_rnd |
|
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list deprecated and removed functions in NEWS file
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|
1018 com2str is_struct uniform_cdf |
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parents:
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|
1019 exponential_cdf is_symmetric uniform_inv |
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|
1020 exponential_inv is_vector uniform_pdf |
|
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1021 exponential_pdf isstr uniform_rnd |
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1022 exponential_rnd lognormal_cdf weibcdf |
|
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1023 f_cdf lognormal_inv weibinv |
|
8ea4cf59c41b
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1024 f_inv lognormal_pdf weibpdf |
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1025 f_pdf lognormal_rnd weibrnd |
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1026 f_rnd meshdom weibull_cdf |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
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|
1027 gamma_cdf normal_cdf weibull_inv |
|
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|
1028 gamma_inv normal_inv weibull_pdf |
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|
1029 gamma_pdf normal_pdf weibull_rnd |
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1030 gamma_rnd normal_rnd wiener_rnd |
|
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1031 geometric_cdf pascal_cdf |
|
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|
1032 geometric_inv pascal_inv |
|
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1033 |
|
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|
1034 The following functions are now deprecated in Octave 3.2 and will |
|
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|
1035 be removed from Octave 3.6 (or whatever version is the second major |
|
8888
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1036 release after 3.2): |
|
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1037 |
|
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|
1038 create_set spcholinv spmax |
|
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|
1039 dmult spcumprod spmin |
|
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|
1040 iscommand spcumsum spprod |
|
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1041 israwcommand spdet spqr |
|
0c7b0049c023
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|
1042 lchol spdiag spsum |
|
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1043 loadimage spfind spsumsq |
|
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1044 mark_as_command spinv str2mat |
|
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1045 mark_as_rawcommand spkron unmark_command |
|
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1046 spatan2 splchol unmark_rawcommand |
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1047 spchol split |
|
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|
1048 spchol2inv splu |
|
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1049 |
|
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1050 See NEWS.3 for old news. |