Mercurial > hg > octave-nkf
annotate NEWS @ 13841:0a158dbdb04a
Remove 3 unused warning ids
Removed ids: empty-list-elements, fortran-indexing, complex-cmp-ops.
Renamed ids: string-concat -> mixed-string-concat
| author | Rik <octave@nomad.inbox5.com> |
|---|---|
| date | Tue, 08 Nov 2011 09:07:13 -0800 |
| parents | 847812137666 |
| children | 40e32fe44aaa |
| 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 ** Octave now features a profiler, thanks to the work of Daniel Kraft |
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7 under the Google Summer of Code mentorship program. The manual has |
| 13262 | 8 been updated to reflect this addition. The new user-visible |
| 9 functions are profexplore, profile, and profshow. | |
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10 |
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11 ** Overhaul of statistical distribution functions |
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12 |
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13 Functions now return "single" outputs for inputs of class "single". |
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14 |
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15 75% reduction in memory usage through use of logical indexing. |
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16 |
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17 Random sample functions now use the same syntax as rand() and accept |
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18 a comma separated list of dimensions or a dimension vector. |
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19 |
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20 Functions have been made Matlab-compatible with regard to special |
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21 cases (probability on boundaries, probabilities for values outside |
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22 distribution, etc.). This may cause subtle changes to existing |
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23 scripts. |
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24 |
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25 negative binomial function has been extended to real, non-integer inputs. |
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26 discrete_inv() now returns v(1) for 0 instead of NaN. |
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27 nbincdf() recoded to use closed form solution with betainc(). |
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28 |
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29 ** strread, textscan, and textread have been completely revamped. |
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30 |
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31 They now support nearly all Matlab functionality including: |
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32 |
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33 * ML-compatible whitespace and delimiter defaults |
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34 |
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35 * ML-compatible options: 'whitespace', treatasempty', |
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36 format string repeat count, user-specified comment style, uneven-length |
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37 output arrays, %n and %u conversion specifiers (provisionally) |
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38 |
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39 ** All .m string functions have been modified for better performance or greater |
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40 Matlab compatibility. Performance gains of 15X-30X have been demonstrated. |
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41 Operations on cell array of strings no longer pay quite as high a penalty |
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42 as those on 2-D character arrays. |
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43 |
| 13262 | 44 deblank: Now requires character or cellstr input. |
| 45 strtrim: Now requires character or cellstr input. | |
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46 No longer trims nulls ("\0") from string for ML compatibility. |
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47 strmatch: Follows documentation precisely and ignores trailing spaces |
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48 in pattern and in string. Note that Matlab documents this |
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49 behavior but the implementation does *not* always follow it. |
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50 substr: Now possible to specify a negative LEN option which extracts |
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51 to within LEN of the end of the string. |
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52 strtok: Now accepts cellstr input. |
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53 base2dec, bin2dec, hex2dec: Now accept cellstr inputs. |
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54 dec2base, dec2bin, dec2hex: Now accept cellstr inputs. |
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55 index, rindex: Now accept 2-D character array input. |
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56 strsplit: Now accepts 2-D character array input. |
| 13262 | 57 |
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58 ** Geometry functions derived from Qhull (convhull, delaunay, voronoi) |
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59 have been revamped. The options passed to the underlying qhull command |
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60 have been changed for better results or for Matlab compatibility. |
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61 |
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62 convhull : Default options are "Qt" for 2D, 3D, 4D inputs |
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63 Default options are "Qt Qx" for 5D and higher |
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64 delaunay : Default options are "Qt Qbb Qc Qz" for 2D and 3D inputs |
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65 Default options are "Qt Qbb Qc Qx" for 4D and higher |
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66 voronoi : No default arguments |
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67 |
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68 ** Octave warning IDs updated |
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69 "empty-list-elements" : removed |
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70 "fortran-indexing" : removed |
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71 "complex-cmp-ops" : removed |
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72 "string-concat" : renamed to "mixed-string-concat" |
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73 |
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74 ** Matlab-compatible preference functions added: |
| 13262 | 75 |
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76 addpref getpref ispref rmpref setpref |
| 13262 | 77 |
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78 ** Other new functions added in 3.6.0: |
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79 |
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80 is_dq_string python zscore |
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81 is_sq_string usejava |
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82 nthargout waitbar |
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83 |
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84 ** Deprecated functions. |
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85 |
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86 The following functions were deprecated in Octave 3.2 and have been |
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87 removed from Octave 3.6. |
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88 |
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89 create_set spcholinv splu |
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90 dmult spcumprod spmax |
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91 iscommand spcumsum spmin |
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92 israwcommand spdet spprod |
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93 lchol spdiag spqr |
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94 loadimage spfind spsum |
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95 mark_as_command sphcat spsumsq |
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96 mark_as_rawcommand spinv spvcat |
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97 spatan2 spkron str2mat |
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98 spchol splchol unmark_command |
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99 spchol2inv split unmark_rawcommand |
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100 |
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101 The following functions have been deprecated in Octave 3.6 and will |
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102 be removed from Octave 3.10 (or whatever version is the second major |
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103 release after 3.6): |
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104 |
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105 cut is_duplicate_entry |
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106 cor polyderiv |
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107 corrcoef studentize |
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108 __error_text__ sylvester_matrix |
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109 error_text |
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110 |
| 13251 | 111 Summary of important user-visible changes for version 3.4.3: |
| 112 ----------------------------------------------------------- | |
| 113 | |
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114 ** Octave 3.4.3 is a bug fixing release. |
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115 |
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116 Summary of important user-visible changes for version 3.4.2: |
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117 ----------------------------------------------------------- |
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118 |
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119 ** Octave 3.4.2 fixes some minor installation problems that affected |
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120 version 3.4.1. |
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121 |
| 12709 | 122 Summary of important user-visible changes for version 3.4.1: |
| 123 ----------------------------------------------------------- | |
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124 |
| 12709 | 125 ** Octave 3.4.1 is primarily a bug fixing release. |
| 126 | |
| 127 ** IMPORTANT note about binary incompatibility in this release: | |
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128 |
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129 Binary compatibility for all 3.4.x releases was originally planned, |
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130 but this is impossible for the 3.4.1 release due to a bug in the way |
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131 shared libraries were built in Octave 3.4.0. Because of this bug, |
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132 .oct files built for Octave 3.4.0 must be recompiled before they |
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133 will work with Octave 3.4.1. |
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134 |
| 12709 | 135 Given that there would be binary incompatibilities with shared |
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136 libraries going from Octave 3.4.0 to 3.4.1, the following |
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137 incompatible changes were also made in this release: |
| 12709 | 138 |
| 139 * The Perl Compatible Regular Expression (PCRE) library is now | |
| 140 required to build Octave. | |
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141 |
| 12712 | 142 * Octave's libraries and .oct files are now installed in |
| 143 subdirectories of $libdir instead of $libexecdir. | |
| 144 | |
| 12709 | 145 Any future Octave 3.4.x release versions should remain binary |
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146 compatible with Octave 3.4.1 as proper library versioning is now |
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147 being used as recommended by the libtool manual. |
| 12709 | 148 |
| 149 ** The following functions have been deprecated in Octave 3.4.1 and will | |
| 150 be removed from Octave 3.8 (or whatever version is the second major | |
| 151 release after 3.4): | |
| 152 | |
| 153 cquad is_duplicate_entry perror strerror | |
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154 |
| 12709 | 155 ** The following functions are new in 3.4.1: |
| 156 | |
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157 colstyle gmres iscolumn isrow mgorth nproc rectangle |
| 12709 | 158 |
| 159 ** The get_forge_pkg function is now private. | |
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160 |
| 12709 | 161 ** The rectangle_lw, rectangle_sw, triangle_lw, and triangle_sw |
| 162 functions are now private. | |
| 163 | |
| 164 ** The logistic_regression_derivatives and logistic_regression_likelihood | |
| 165 functions are now private. | |
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166 |
| 12739 | 167 ** ChangeLog files in the Octave sources are no longer maintained |
| 168 by hand. Instead, there is a single ChangeLog file generated from | |
| 169 the Mercurial version control commit messages. Older ChangeLog | |
| 170 information can be found in the etc/OLD-ChangeLogs directory in the | |
| 171 source distribution. | |
| 172 | |
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173 Summary of important user-visible changes for version 3.4: |
| 9352 | 174 --------------------------------------------------------- |
| 175 | |
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176 ** BLAS and LAPACK libraries are now required to build Octave. The |
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177 subset of the reference BLAS and LAPACK libraries has been removed |
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178 from the Octave sources. |
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179 |
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180 ** The ARPACK library is now distributed with Octave so it no longer |
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181 needs to be available as an external dependency when building |
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182 Octave. |
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183 |
| 10118 | 184 ** The `lookup' function was extended to be more useful for |
| 185 general-purpose binary searching. Using this improvement, the | |
| 186 ismember function was rewritten for significantly better | |
| 187 performance. | |
| 9352 | 188 |
| 189 ** Real, integer and logical matrices, when used in indexing, will now | |
| 190 cache the internal index_vector value (zero-based indices) when | |
| 191 successfully used as indices, eliminating the conversion penalty for | |
| 10118 | 192 subsequent indexing by the same matrix. In particular, this means it |
| 193 is no longer needed to avoid repeated indexing by logical arrays | |
| 194 using find for performance reasons. | |
| 9888 | 195 |
| 10118 | 196 ** Logical matrices are now treated more efficiently when used as |
| 197 indices. Octave will keep the index as a logical mask unless the | |
| 198 ratio of true elements is small enough, using a specialized | |
| 199 code. Previously, all logical matrices were always first converted | |
| 200 to index vectors. This results in savings in both memory and | |
| 201 computing time. | |
| 9480 | 202 |
| 10118 | 203 ** The `sub2ind' and `ind2sub' functions were reimplemented as compiled |
| 204 functions for better performance. These functions are now faster, | |
| 205 can deliver more economized results for ranges, and can reuse the | |
| 206 index cache mechanism described in previous paragraph. | |
| 207 | |
| 208 ** The built-in function equivalents to associative operators (`plus', | |
| 209 `times', `mtimes', `and', and `or') have been extended to accept | |
| 210 multiple arguments. This is especially useful for summing | |
| 211 (multiplying, etc.) lists of objects (of possibly distinct types): | |
| 9408 | 212 |
| 9449 | 213 matrix_sum = plus (matrix_list{:}); |
| 214 | |
| 10118 | 215 ** An FTP object type based on libcurl has been implemented. These |
| 216 objects allow ftp connections, downloads and uploads to be | |
| 217 managed. For example, | |
| 9880 | 218 |
| 10118 | 219 fp = ftp ("ftp.octave.org); |
| 220 cd (fp, "gnu/octave"); | |
| 221 mget (fp, "octave-3.2.3.tar.bz2"); | |
| 222 close (fp); | |
| 9880 | 223 |
| 10118 | 224 ** The default behavior of `assert (observed, expected)' has been |
| 225 relaxed to employ less strict checking that does not require the | |
| 226 internals of the values to match. This avoids previously valid | |
| 227 tests from breaking due to new internal classes introduced in future | |
| 228 Octave versions. | |
| 9449 | 229 |
| 230 For instance, all of these assertions were true in Octave 3.0.x | |
| 231 but false in 3.2.x due to new optimizations and improvements: | |
| 232 | |
| 233 assert (2*linspace (1, 5, 5), 2*(1:5)) | |
| 234 assert (zeros (0, 0), []) | |
| 235 assert (2*ones (1, 5), (2) (ones (1,5))) | |
| 9462 | 236 |
| 10118 | 237 ** The behavior of library functions `ismatrix', `issquare', and |
| 238 `issymmetric' has been changed for better consistency. | |
| 9873 | 239 |
| 10292 | 240 * The `ismatrix' function now returns true for all numeric, |
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241 logical and character 2-D or N-D matrices. Previously, `ismatrix' |
| 10292 | 242 returned false if the first or second dimension was zero. |
| 243 Hence, `ismatrix ([])' was false, | |
| 244 while `ismatrix (zeros (1,2,0))' was true. | |
| 9873 | 245 |
| 10118 | 246 * The `issquare' function now returns a logical scalar, and is |
| 247 equivalent to the expression | |
| 248 | |
| 249 ismatrix (x) && ndims (x) == 2 && rows (x) == columns (x) | |
| 250 | |
| 251 The dimension is no longer returned. As a result, `issquare ([])' | |
| 252 now yields true. | |
| 9873 | 253 |
| 10118 | 254 * The `issymmetric' function now checks for symmetry instead of |
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255 Hermitianness. For the latter, ishermitian was created. Also, |
| 10118 | 256 logical scalar is returned rather than the dimension, so |
| 257 `issymmetric ([])' is now true. | |
| 9873 | 258 |
| 10118 | 259 ** Function handles are now aware of overloaded functions. If a |
| 260 function is overloaded, the handle determines at the time of its | |
| 261 reference which function to call. A non-overloaded version does not | |
| 262 need to exist. | |
| 9873 | 263 |
| 10118 | 264 ** Overloading functions for built-in classes (double, int8, cell, |
| 265 etc.) is now compatible with Matlab. | |
| 9408 | 266 |
| 10323 | 267 ** Function handles can now be compared with the == and != operators, |
| 268 as well as the `isequal' function. | |
| 269 | |
| 10118 | 270 ** Performance of concatenation (using []) and the functions `cat', |
| 271 `horzcat', and `vertcat' has been improved for multidimensional | |
| 272 arrays. | |
| 10117 | 273 |
| 9547 | 274 ** The operation-assignment operators +=, -=, *= and /= now behave more |
| 10118 | 275 efficiently in certain cases. For instance, if M is a matrix and S a |
| 276 scalar, then the statement | |
| 9547 | 277 |
| 10118 | 278 M += S; |
| 9547 | 279 |
| 10118 | 280 will operate on M's data in-place if it is not shared by another |
| 281 variable, usually increasing both time and memory efficiency. | |
| 9547 | 282 |
| 9558 | 283 Only selected common combinations are affected, namely: |
| 9547 | 284 |
| 285 matrix += matrix | |
| 286 matrix -= matrix | |
| 9558 | 287 matrix .*= matrix |
| 288 matrix ./= matrix | |
| 289 | |
| 9547 | 290 matrix += scalar |
| 291 matrix -= scalar | |
| 292 matrix *= scalar | |
| 293 matrix /= scalar | |
| 9558 | 294 |
| 9552 | 295 logical matrix |= logical matrix |
| 296 logical matrix &= logical matrix | |
| 9547 | 297 |
| 10118 | 298 where matrix and scalar belong to the same class. The left-hand |
| 299 side must be a simple variable reference. | |
| 9888 | 300 |
| 10118 | 301 Moreover, when unary operators occur in expressions, Octave will |
| 302 also try to do the operation in-place if it's argument is a | |
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303 temporary expression. |
| 9589 | 304 |
| 10118 | 305 ** The effect of comparison operators (<, >, <=, and >=) applied to |
| 306 complex numbers has changed to be consistent with the strict | |
| 307 ordering defined by the `max', `min', and `sort' functions. More | |
| 308 specifically, complex numbers are compared by lexicographical | |
| 309 comparison of the pairs `[abs(z), arg(z)]'. Previously, only real | |
| 310 parts were compared; this can be trivially achieved by wrapping the | |
| 311 operands in real(). | |
| 9547 | 312 |
| 10118 | 313 ** The automatic simplification of complex computation results has |
| 314 changed. Octave will now simplify any complex number with a zero | |
| 315 imaginary part or any complex matrix with all elements having zero | |
| 316 imaginary part to a real value. Previously, this was done only for | |
| 317 positive zeros. Note that the behavior of the complex function is | |
| 318 unchanged and it still produces a complex value even if the | |
| 319 imaginary part is zero. | |
| 9826 | 320 |
| 10118 | 321 ** As a side effect of code refactoring in liboctave, the binary |
| 322 logical operations are now more easily amenable to compiler | |
| 323 optimizations and are thus significantly faster. | |
| 9595 | 324 |
| 10118 | 325 ** Octave now allows user-defined `subsasgn' methods to optimize out |
| 326 redundant copies. For more information, see the manual. | |
| 9595 | 327 |
| 10453 | 328 ** More efficient matrix division handling. Octave is now able to |
| 10118 | 329 handle the expressions |
| 9664 | 330 |
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331 M' \ V |
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332 M.' \ V |
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333 V / M |
| 9664 | 334 |
| 10118 | 335 (M is a matrix and V is a vector) more efficiently in certain cases. |
| 336 In particular, if M is triangular, all three expressions will be | |
| 337 handled by a single call to xTRTRS (from LAPACK), with appropriate | |
| 10453 | 338 flags. Previously, all three expressions required a physical |
| 10118 | 339 transpose of M. |
| 9664 | 340 |
| 10118 | 341 ** More efficient handling of certain mixed real-complex matrix |
| 342 operations. For instance, if RM is a real matrix and CM a complex | |
| 343 matrix, | |
| 9664 | 344 |
| 10118 | 345 RM * CM |
| 9664 | 346 |
| 347 can now be evaluated either as | |
| 348 | |
| 349 complex (RM * real (CM), RM * imag (CM)) | |
| 350 | |
| 351 or as | |
| 352 | |
| 353 complex (RM) * CM, | |
| 354 | |
| 10453 | 355 depending on the dimensions. The first form requires more |
| 356 temporaries and copying, but halves the FLOP count, which normally | |
| 357 brings better performance if RM has enough rows. Previously, the | |
| 358 second form was always used. | |
| 9664 | 359 |
| 11111 | 360 Matrix division is similarly affected. |
| 9664 | 361 |
| 10118 | 362 ** More efficient handling of triangular matrix factors returned from |
| 363 factorizations. The functions for computing QR, LU and Cholesky | |
| 364 factorizations will now automatically return the triangular matrix | |
| 365 factors with proper internal matrix_type set, so that it won't need | |
| 366 to be computed when the matrix is used for division. | |
| 9717 | 367 |
| 10118 | 368 ** The built-in `sum' function now handles the non-native summation |
| 369 (i.e., double precision sum of single or integer inputs) more | |
| 370 efficiently, avoiding a temporary conversion of the whole input | |
| 371 array to doubles. Further, `sum' can now accept an extra option | |
| 372 argument, using a compensated summation algorithm rather than a | |
| 373 straightforward sum, which significantly improves precision if lots | |
| 374 of cancellation occurs in the summation. | |
| 9717 | 375 |
| 10118 | 376 ** The built-in `bsxfun' function now uses optimized code for certain |
| 377 cases where built-in operator handles are passed in. Namely, the | |
| 378 optimizations concern the operators `plus', `minus', `times', | |
| 379 `ldivide', `rdivide', `power', `and', `or' (for logical arrays), | |
| 380 the relational operators `eq', `ne', `lt', `le', `gt', `ge', and the | |
| 381 functions `min' and `max'. Optimizations only apply when both | |
| 382 operands are of the same built-in class. Mixed real/complex and | |
| 383 single/double operations will first convert both operands to a | |
| 384 common type. | |
| 9745 | 385 |
| 10118 | 386 ** The `strfind' and `strrep' functions now have compiled |
| 387 implementations, facilitating significantly more efficient searching | |
| 388 and replacing in strings, especially with longer patterns. The code | |
| 389 of `strcat' has been vectorized and is now much more efficient when | |
| 390 many strings are concatenated. The `strcmpi' and `strncmpi' | |
| 391 functions are now built-in functions, providing better performance. | |
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392 |
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393 ** 'str2double' now has a compiled implementation and the API conforms |
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394 to Matlab. The additional Octave-specific features of returning a |
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395 boolean matrix indicating which elements were successfully converted |
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396 has been removed. |
| 10208 | 397 |
| 10453 | 398 ** Matlab-style ignoring input and output function arguments using |
| 11111 | 399 tilde (~) is now supported. Ignored output arguments may be |
| 400 detected from a function using the built-in function `isargout'. | |
| 401 For more details, consult the manual. | |
| 10886 | 402 |
| 10453 | 403 ** The list datatype, deprecated since the introduction of cells, has |
| 404 been removed. | |
| 10276 | 405 |
| 10453 | 406 ** The accumarray function has been optimized and is now significantly |
| 407 faster in certain important cases. | |
| 10054 | 408 |
| 10292 | 409 ** The behavior of isreal and isnumeric functions was changed to be more |
| 410 Matlab-compatible. | |
| 411 | |
| 10406 | 412 ** The integer math & conversion warnings (Octave:int-convert-nan, |
| 413 Octave:int-convert-non-int-val, Octave:int-convert-overflow, | |
| 11111 | 414 Octave:int-math-overflow) have been removed. |
| 10406 | 415 |
| 10453 | 416 ** rem and mod are now built-in functions. They also handle integer |
| 417 types efficiently using integer arithmetic. | |
| 10437 | 418 |
| 10536 | 419 ** Sparse indexing and indexed assignment has been mostly rewritten. |
| 420 Since Octave uses compressed column storage for sparse matrices, | |
| 421 major attention is devoted to operations manipulating whole columns. | |
| 422 Such operations are now significantly faster, as well as some other | |
| 423 important cases. | |
| 424 | |
| 425 Further, it is now possible to pre-allocate a sparse matrix and | |
| 426 subsequently fill it by assignments, provided they meet certain | |
| 427 conditions. For more information, consult the `spalloc' function, | |
| 428 which is no longer a mere dummy. Consequently, nzmax and nnz are no | |
| 11111 | 429 longer always equal in Octave. Octave may also produce a matrix |
| 430 with nnz < nzmax as a result of other operations, so you should | |
| 431 consistently use nnz unless you really want to use nzmax (i.e. the | |
| 432 space allocated for nonzero elements). | |
| 10536 | 433 |
| 434 Sparse concatenation is also affected, and concatenating sparse | |
| 435 matrices, especially larger collections, is now significantly more | |
| 11111 | 436 efficient. This applies to both the [] operator and the |
| 10536 | 437 cat/vertcat/horzcat functions. |
| 438 | |
| 11111 | 439 ** It is now possible to optionally employ the xGESDD LAPACK drivers |
| 440 for computing the singular value decomposition using svd(), instead | |
| 441 of the default xGESVD, using the configuration pseudo-variable | |
| 442 svd_driver. The xGESDD driver can be up to 6x times faster when | |
| 443 singular vectors are requested, but is reported to be somewhat less | |
| 10639 | 444 robust on highly ill-conditioned matrices. |
| 445 | |
| 446 ** Configuration pseudo-variables, such as page_screen_output or | |
| 447 confirm_recursive_rmdir (or the above mentioned svd_driver), now | |
| 448 accept a "local" option as second argument, requesting the change | |
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449 to be undone when the current function returns: |
| 10639 | 450 |
| 451 function [status, msg] = rm_rf (dir) | |
| 452 confirm_recursive_rmdir (false, "local"); | |
| 453 [status, msg] = rmdir (dir, "s"); | |
| 454 ... | |
| 455 endfunction | |
| 456 | |
| 457 Upon return, confirm_recursive_rmdir will be restored to the value | |
| 458 it had on entry to the function, even if there were subsequent | |
| 459 changes to the variable in function rm_rf or any of the functions | |
| 460 it calls. | |
| 461 | |
| 11111 | 462 ** pkg now accepts a -forge option for downloading and installing |
| 463 packages from Octave Forge automatically. For example, | |
| 10774 | 464 |
| 465 pkg install -forge general | |
| 466 | |
| 11111 | 467 will automatically download the latest release of the general |
| 468 package and attempt to install it. No automatic resolving of | |
| 469 dependencies is provided. Further, | |
| 10639 | 470 |
| 10774 | 471 pkg list -forge |
| 472 | |
| 473 can be used to list all available packages. | |
| 474 | |
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475 ** The internal data representation of structs has been completely |
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476 rewritten to make certain optimizations feasible. The field data |
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477 can now be shared between structs with equal keys but different |
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478 dimensions or values, making operations that preserve the fields |
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479 faster. Economized storage is now used for scalar structs (just |
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480 like most other scalars), making their usage more |
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481 memory-efficient. Certain array-like operations on structs |
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482 (concatenation, uniform cellfun, num2cell) have gained a |
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483 significant speed-up. Additionally, the octave_scalar_map class |
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484 now provides a simpler interface to work with scalar structs within |
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485 a C++ DLD function. |
| 10639 | 486 |
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487 ** Two new formats are available for displaying numbers: |
| 11111 | 488 |
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489 format short eng |
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490 format long eng |
| 11111 | 491 |
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492 Both display numbers in engineering notation, i.e., mantissa + |
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493 exponent where the exponent is a multiple of 3. |
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494 |
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495 ** The following functions are new in Octave 3.4: |
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496 accumdim erfcx nfields pqpnonneg uigetdir |
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497 bitpack fileread nth_element quadcc uigetfile |
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498 bitunpack fminbnd onCleanup randi uiputfile |
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499 blkmm fskipl pbaspect repelems uimenu |
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500 cbrt ifelse pie3 reset whitebg |
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501 curl ishermitian powerset rsf2csf |
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502 chop isindex ppder saveas |
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503 daspect luupdate ppint strread |
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504 divergence merge ppjumps textread |
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505 |
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506 ** Using the image function to view images with external programs such |
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507 as display, xv, and xloadimage is no longer supported. The |
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508 image_viewer function has also been removed. |
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509 |
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510 ** The behavior of struct assignments to non-struct values has been |
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511 changed. Previously, it was possible to overwrite an arbitrary |
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512 value: |
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513 |
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514 a = 1; |
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515 a.x = 2; |
| 10873 | 516 |
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517 This is no longer possible unless a is an empty matrix or cell |
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518 array. |
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519 |
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520 ** The dlmread function has been extended to allow specifying a custom |
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521 value for empty fields. |
| 10829 | 522 |
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523 ** The dlmread and dlmwrite functions have been modified to accept |
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524 file IDs (as returned by fopen) in addition to file names. |
| 11111 | 525 |
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526 ** Octave can now optimize away the interpreter overhead of an |
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527 anonymous function handle, if the function simply calls another |
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528 function or handle with some of its parameters bound to certain |
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529 values. Example: |
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530 |
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531 f = @(x) sum (x, 1); |
| 10966 | 532 |
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533 When f is called, the call is forwarded to @sum with the constant 1 |
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534 appended, and the anonymous function call does not occur on the |
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535 call stack. |
| 10829 | 536 |
| 12424 | 537 ** For compatibility with Matlab, mu2lin (x) is now equivalent to |
| 538 mu2lin (x, 0). | |
| 539 | |
| 540 ** The new function `history_control' may be used to control the way | |
| 541 command lines are added to the history list when Octave is using | |
| 542 readline for command-line editing. For example | |
| 543 | |
| 544 history_control ("ignoredups") | |
| 545 | |
| 546 tells Octave to avoid adding duplicate lines to the history list. | |
| 547 | |
| 548 ** Octave now uses the gnulib library for improved portability and to | |
| 549 avoid bugs in operating system functions. | |
| 550 | |
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551 ** Deprecated functions. |
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552 |
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553 The following functions were deprecated in Octave 3.0 and have been |
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554 removed from Octave 3.4. |
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555 |
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556 beta_cdf geometric_pdf pascal_pdf |
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557 beta_inv geometric_rnd pascal_rnd |
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558 beta_pdf hypergeometric_cdf poisson_cdf |
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559 beta_rnd hypergeometric_inv poisson_inv |
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560 binomial_cdf hypergeometric_pdf poisson_pdf |
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561 binomial_inv hypergeometric_rnd poisson_rnd |
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562 binomial_pdf intersection polyinteg |
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563 binomial_rnd is_bool setstr |
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564 chisquare_cdf is_complex struct_contains |
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565 chisquare_inv is_list struct_elements |
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566 chisquare_pdf is_matrix t_cdf |
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567 chisquare_rnd is_scalar t_inv |
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568 clearplot is_square t_pdf |
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569 clg is_stream t_rnd |
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570 com2str is_struct uniform_cdf |
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571 exponential_cdf is_symmetric uniform_inv |
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572 exponential_inv is_vector uniform_pdf |
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573 exponential_pdf isstr uniform_rnd |
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574 exponential_rnd lognormal_cdf weibcdf |
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575 f_cdf lognormal_inv weibinv |
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576 f_inv lognormal_pdf weibpdf |
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577 f_pdf lognormal_rnd weibrnd |
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578 f_rnd meshdom weibull_cdf |
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579 gamma_cdf normal_cdf weibull_inv |
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580 gamma_inv normal_inv weibull_pdf |
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581 gamma_pdf normal_pdf weibull_rnd |
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582 gamma_rnd normal_rnd wiener_rnd |
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583 geometric_cdf pascal_cdf |
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584 geometric_inv pascal_inv |
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585 |
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586 The following functions were deprecated in Octave 3.2 and will |
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587 be removed from Octave 3.6 (or whatever version is the second major |
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588 release after 3.2): |
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589 |
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590 create_set spcholinv splu |
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591 dmult spcumprod spmax |
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592 iscommand spcumsum spmin |
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593 israwcommand spdet spprod |
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594 lchol spdiag spqr |
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595 loadimage spfind spsum |
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596 mark_as_command sphcat spsumsq |
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597 mark_as_rawcommand spinv spvcat |
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598 spatan2 spkron str2mat |
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599 spchol splchol unmark_command |
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600 spchol2inv split unmark_rawcommand |
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601 |
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602 The following functions have been deprecated in Octave 3.4 and will |
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603 be removed from Octave 3.8 (or whatever version is the second major |
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604 release after 3.4): |
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605 |
|
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606 autocor cellidx gammai krylovb saveimage |
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607 autocov dispatch glpkmex perror strerror |
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608 betai fstat is_global replot values |
|
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609 |
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610 Summary of important user-visible changes for version 3.2: |
| 5913 | 611 --------------------------------------------------------- |
| 2452 | 612 |
| 8737 | 613 ** Compatibility with Matlab graphics has been improved. |
| 6329 | 614 |
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615 The hggroup object and associated listener callback functions have |
| 8737 | 616 been added allowing the inclusion of group objects. Data sources |
|
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617 have been added to these group objects such that |
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618 |
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619 x = 0:0.1:10; |
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620 y = sin (x); |
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621 plot (x, y, "ydatasource", "y"); |
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622 for i = 1 : 100 |
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623 pause(0.1) |
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624 y = sin (x + 0.1 * i); |
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625 refreshdata(); |
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626 endfor |
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627 |
| 8737 | 628 works as expected. This capability has be used to introduce |
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629 stem-series, bar-series, etc., objects for better Matlab |
| 8737 | 630 compatibility. |
| 631 | |
| 632 ** New graphics functions: | |
| 633 | |
|
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634 addlistener ezcontour gcbo refresh |
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635 addproperty ezcontourf ginput refreshdata |
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636 allchild ezmesh gtext specular |
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637 available_graphics_toolkits ezmeshc intwarning surfl |
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638 graphics_toolkit ezplot ishghandle trisurf |
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639 cla ezplot3 isocolors waitforbuttonpress |
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640 clabel ezpolar isonormals |
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641 comet ezsurf isosurface |
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642 dellistener findall linkprop |
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643 diffuse gcbf plotmatrix |
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644 |
| 8737 | 645 ** New experimental OpenGL/FLTK based plotting system. |
| 646 | |
| 647 An experimental plotting system based on OpenGL and the FLTK | |
|
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648 toolkit is now part of Octave. This graphics toolkit is disabled by |
| 8737 | 649 default. You can switch to using it with the command |
|
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650 |
|
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651 graphics_toolkit ("fltk") |
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652 |
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653 for all future figures or for a particular figure with the command |
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654 |
|
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|
655 graphics_toolkit (h, "fltk") |
|
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656 |
| 11139 | 657 where "h" is a valid figure handle. |
|
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658 |
| 8737 | 659 ** Functions providing direct access to gnuplot have been removed. |
| 660 | |
|
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|
661 The functions __gnuplot_plot__, __gnuplot_set__, __gnuplot_raw__, |
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662 __gnuplot_show__, __gnuplot_replot__, __gnuplot_splot__, |
| 8737 | 663 __gnuplot_save_data__ and __gnuplot_send_inline_data__ have been |
| 664 removed from Octave. These function were incompatible with the | |
| 665 high level graphics handle code. | |
| 6329 | 666 |
| 8885 | 667 ** The Control, Finance and Quaternion functions have been removed. |
| 668 | |
| 669 These functions are now available as separate packages from | |
| 670 | |
| 671 http://octave.sourceforge.net/packages.html | |
| 672 | |
| 673 and can be reinstalled using the Octave package manager (see | |
| 674 the pkg function). | |
| 675 | |
| 676 ** Specific sparse matrix functions removed. | |
| 677 | |
| 678 The following functions, which handled only sparse matrices have | |
| 679 been removed. Instead of calling these functions directly, you | |
| 680 should use the corresponding function without the "sp" prefix. | |
| 8737 | 681 |
| 8885 | 682 spatan2 spcumsum spkron spprod |
| 683 spchol spdet splchol spqr | |
| 684 spchol2inv spdiag splu spsum | |
| 685 spcholinv spfind spmax spsumsqk | |
| 686 spcumprod spinv spmin | |
| 687 | |
| 688 ** Improvements to the debugger. | |
| 689 | |
| 690 The interactive debugging features have been improved. Stopping | |
| 691 on statements with dbstop should work correctly now. Stepping | |
| 692 into and over functions, and stepping one statement at a time | |
| 693 (with dbstep) now works. Moving up and down the call stack with | |
| 694 dbup and dbdown now works. The dbstack function is now available | |
| 695 to print the current function call stack. The new dbquit function | |
| 696 is available to exit the debugging mode. | |
| 697 | |
| 698 ** Improved traceback error messages. | |
| 699 | |
| 700 Traceback error messages are much more concise and easier to | |
| 701 understand. They now display information about the function call | |
| 702 stack instead of the stack of all statements that were active at | |
| 703 the point of the error. | |
|
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704 |
| 8737 | 705 ** Object Oriented Programming. |
|
8405
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706 |
| 8737 | 707 Octave now includes OOP features and the user can create their own |
| 708 class objects and overloaded functions and operators. For | |
| 709 example, all methods of a class called "myclass" will be found in | |
| 710 a directory "@myclass" on the users path. The class specific | |
| 711 versions of functions and operators take precedence over the | |
| 712 generic versions of these functions. | |
| 713 | |
| 714 New functions related to OOP include | |
| 7189 | 715 |
| 8737 | 716 class inferiorto isobject loadobj methods superiorto |
| 717 | |
| 718 See the Octave manual for more details. | |
| 7038 | 719 |
| 8747 | 720 ** Parsing of Command-style Functions. |
| 721 | |
| 722 Octave now parses command-style functions without needing to first | |
| 723 declare them with "mark_as_command". The rules for recognizing a | |
| 724 command-style function calls are | |
| 725 | |
| 726 * A command must appear as the first word in a statement, | |
| 727 followed by a space. | |
| 728 | |
| 729 * The first character after the space must not be '=' or '(' | |
| 730 | |
| 731 * The next token after the space must not look like a binary | |
| 732 operator. | |
| 733 | |
| 734 These rules should be mostly compatible with the way Matlab parses | |
| 735 command-style function calls and allow users to define commands in | |
| 736 .m files without having to mark them as commands. | |
| 737 | |
| 738 Note that previous versions of Octave allowed expressions like | |
| 739 | |
| 740 x = load -text foo.dat | |
| 741 | |
| 742 but an expression like this will now generate a parse error. In | |
| 743 order to assign the value returned by a function to a variable, | |
| 744 you must use the normal function call syntax: | |
| 745 | |
| 746 x = load ("-text", "foo.dat"); | |
| 747 | |
| 8737 | 748 ** Block comments. |
| 749 | |
| 8747 | 750 Commented code can be between matching "#{" and "#}" or "%{" and |
| 751 "%}" markers, even if the commented code spans several line. This | |
| 752 allows blocks code to be commented, without needing to comment | |
| 753 each line. For example, | |
| 5814 | 754 |
| 8747 | 755 function [s, t] = func (x, y) |
| 756 s = 2 * x; | |
| 757 #{ | |
| 758 s *= y; | |
| 759 t = y + x; | |
| 760 #} | |
|
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|
761 endfunction |
| 5814 | 762 |
| 8747 | 763 the lines "s *= y;" and "t = y + x" will not be executed. |
| 8737 | 764 |
|
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765 ** If any subfunction in a file ends with "end" or "endfunction", then |
|
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766 they all must end that way. Previously, Octave accepted |
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767 |
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|
768 function main () |
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769 ... |
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770 # no endfunction here. |
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771 function sub () |
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772 ... |
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773 endfunction |
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774 |
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775 but this is no longer allowed. |
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776 |
| 8737 | 777 ** Special treatment in the parser of expressions like "a' * b". |
| 2452 | 778 |
| 8737 | 779 In these cases the transpose is no longer explicitly formed and |
| 780 BLAS libraries are called with the transpose flagged, | |
| 781 significantly improving performance for these kinds of | |
| 782 operations. | |
|
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783 |
| 8737 | 784 ** Single Precision data type. |
| 2452 | 785 |
| 8737 | 786 Octave now includes a single precision data type. Single |
| 787 precision variables can be created with the "single" command, or | |
|
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788 from functions like ones, eye, etc. For example, |
| 5995 | 789 |
| 8737 | 790 single (1) |
| 791 ones (2, 2, "single") | |
| 792 zeros (2, 2, "single") | |
| 793 eye (2, 2, "single") | |
| 794 Inf (2, 2, "single") | |
| 795 NaN (2, 2, "single") | |
| 796 NA (2, 2, "single") | |
| 7279 | 797 |
| 8737 | 798 all create single precision variables. For compatibility with |
| 799 Matlab, mixed double/single precision operators and functions | |
| 800 return single precision types. | |
| 801 | |
| 802 As a consequence of this addition to Octave the internal | |
|
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803 representation of the double precision NA value has changed, and |
|
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804 so users that make use of data generated by Octave with R or |
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|
805 visa-versa are warned that compatibility might not be assured. |
| 7279 | 806 |
| 8737 | 807 ** Improved array indexing. |
| 808 | |
| 809 The underlying code used for indexing of arrays has been | |
|
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810 completely rewritten and indexing is now significantly faster. |
| 8737 | 811 |
| 8755 | 812 ** Improved memory management. |
| 813 | |
| 814 Octave will now attempt to share data in some cases where previously | |
| 815 a copy would be made, such as certain array slicing operations or | |
|
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816 conversions between cells, structs and cs-lists. This usually reduces |
| 8755 | 817 both time and memory consumption. |
| 9128 | 818 Also, Octave will now attempt to detect and optimize usage of a vector |
| 819 as a stack, when elements are being repeatedly inserted at/removed from | |
| 820 the end of the vector. | |
| 8755 | 821 |
| 8738 | 822 ** Improved performance for reduction operations. |
| 823 | |
| 8755 | 824 The performance of the sum, prod, sumsq, cumsum, cumprod, any, all, |
| 825 max and min functions has been significantly improved. | |
| 8738 | 826 |
| 9006 | 827 ** Sorting and searching. |
| 828 | |
| 829 The performance of sort has been improved, especially when sorting | |
| 10453 | 830 indices are requested. An efficient built-in issorted |
| 831 implementation was added. The sortrows function now uses a more | |
|
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832 efficient algorithm, especially in the homogeneous case. The lookup |
| 10453 | 833 function is now a built-in function performing a binary search, |
| 834 optimized for long runs of close elements. Lookup also works with | |
| 835 cell arrays of strings. | |
| 9006 | 836 |
| 837 ** Range arithmetics | |
| 838 | |
| 10453 | 839 For some operations on ranges, Octave will attempt to keep the |
| 840 result as a range. These include negation, adding a scalar, | |
| 841 subtracting a scalar, and multiplying by a scalar. Ranges with zero | |
| 842 increment are allowed and can be constructed using the built-in | |
| 843 function `ones'. | |
| 9006 | 844 |
| 845 ** Various performance improvements. | |
| 846 | |
| 10453 | 847 Performance of a number of other built-in operations and functions |
| 848 was improved, including: | |
| 9006 | 849 |
| 850 * logical operations | |
| 851 * comparison operators | |
| 852 * element-wise power | |
| 853 * accumarray | |
| 854 * cellfun | |
| 855 * isnan | |
| 856 * isinf | |
| 857 * isfinite | |
| 858 * nchoosek | |
| 859 * repmat | |
| 860 * strcmp | |
| 861 | |
| 8737 | 862 ** 64-bit integer arithmetic. |
| 863 | |
| 864 Arithmetic with 64-bit integers (int64 and uint64 types) is fully | |
| 865 supported, with saturation semantics like the other integer types. | |
| 866 Performance of most integer arithmetic operations has been | |
| 867 improved by using integer arithmetic directly. Previously, Octave | |
| 868 performed integer math with saturation semantics by converting the | |
| 869 operands to double precision, performing the operation, and then | |
| 870 converting the result back to an integer value, truncating if | |
| 871 necessary. | |
| 872 | |
| 8885 | 873 ** Diagonal and permutation matrices. |
| 874 | |
| 875 The interpreter can now treat diagonal and permutation matrices as | |
| 876 special objects that store only the non-zero elements, rather than | |
| 877 general full matrices. Therefore, it is now possible to construct | |
| 878 and use these matrices in linear algebra without suffering a | |
| 879 performance penalty due to storing large numbers of zero elements. | |
| 880 | |
| 881 ** Improvements to fsolve. | |
| 882 | |
| 883 The fsolve function now accepts an option structure argument (see | |
| 884 also the optimset function). The INFO values returned from fsolve | |
| 885 have changed to be compatible with Matlab's fsolve function. | |
| 886 Additionally, fsolve is now able to solve overdetermined systems, | |
| 887 complex-differentiable complex systems, systems with a sparse | |
| 888 jacobian and can work in single precision if given single precision | |
|
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889 inputs. It can also be called recursively. |
| 8885 | 890 |
| 8737 | 891 ** Improvements to the norm function. |
| 892 | |
| 893 The norm function is now able to compute row or column norms of a | |
| 894 matrix in a single call, as well as general matrix p-norms. | |
| 895 | |
| 896 ** New functions for computing some eigenvalues or singular values. | |
| 897 | |
| 898 The eigs and svds functions have been included in Octave. These | |
| 899 functions require the ARPACK library (now distributed under a | |
| 900 GPL-compatible license). | |
| 901 | |
| 902 ** New QR and Cholesky factorization updating functions. | |
|
8370
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903 |
| 8737 | 904 choldelete cholshift qrdelete qrshift |
| 905 cholinsert cholupdate qrinsert qrupdate | |
| 906 | |
| 907 ** New quadrature functions. | |
| 908 | |
| 909 dblquad quadgk quadv triplequad | |
| 910 | |
| 8885 | 911 ** New functions for reading and writing images. |
| 912 | |
| 913 The imwrite and imread functions have been included in Octave. | |
| 914 These functions require the GraphicsMagick library. The new | |
| 915 function imfinfo provides information about an image file (size, | |
| 916 type, colors, etc.) | |
| 917 | |
|
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918 ** The input_event_hook function has been replaced by the pair of |
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919 functions add_input_event_hook and remove_input_event_hook so that |
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920 more than one hook function may be installed at a time. |
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921 |
| 8737 | 922 ** Other miscellaneous new functions. |
|
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923 |
|
8932
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924 addtodate hypot reallog |
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925 bicgstab idivide realpow |
| 9006 | 926 cellslices info realsqrt |
| 927 cgs interp1q rectint | |
| 928 command_line_path isdebugmode regexptranslate | |
| 929 contrast isfloat restoredefaultpath | |
| 930 convn isstrprop roundb | |
| 931 cummin log1p rundemos | |
| 932 cummax lsqnonneg runlength | |
| 933 datetick matlabroot saveobj | |
| 934 display namelengthmax spaugment | |
| 935 expm1 nargoutchk strchr | |
| 936 filemarker pathdef strvcat | |
| 937 fstat perl subspace | |
| 938 full prctile symvar | |
| 939 fzero quantile treelayout | |
| 940 genvarname re_read_readline_init_file validatestring | |
| 941 histc | |
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942 |
| 8885 | 943 ** Changes to strcat. |
| 944 | |
| 945 The strcat function is now compatible with Matlab's strcat | |
| 946 function, which removes trailing whitespace when concatenating | |
| 947 character strings. For example | |
| 948 | |
| 949 strcat ('foo ', 'bar') | |
| 950 ==> 'foobar' | |
| 951 | |
| 952 The new function cstrcat provides the previous behavior of | |
| 953 Octave's strcat. | |
| 954 | |
| 955 ** Improvements to the help functions. | |
| 956 | |
|
9034
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957 The help system has been mostly re-implemented in .m files to make |
| 8885 | 958 it easier to modify. Performance of the lookfor function has been |
| 959 greatly improved by caching the help text from all functions that | |
| 960 are distributed with Octave. The pkg function has been modified | |
| 961 to generate cache files for external packages when they are | |
| 962 installed. | |
| 963 | |
|
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964 ** Deprecated functions. |
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965 |
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966 The following functions were deprecated in Octave 3.0 and will be |
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967 removed from Octave 3.4 (or whatever version is the second major |
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968 release after 3.0): |
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969 |
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970 beta_cdf geometric_pdf pascal_pdf |
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971 beta_inv geometric_rnd pascal_rnd |
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972 beta_pdf hypergeometric_cdf poisson_cdf |
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973 beta_rnd hypergeometric_inv poisson_inv |
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974 binomial_cdf hypergeometric_pdf poisson_pdf |
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975 binomial_inv hypergeometric_rnd poisson_rnd |
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976 binomial_pdf intersection polyinteg |
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977 binomial_rnd is_bool setstr |
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978 chisquare_cdf is_complex struct_contains |
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979 chisquare_inv is_list struct_elements |
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980 chisquare_pdf is_matrix t_cdf |
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981 chisquare_rnd is_scalar t_inv |
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982 clearplot is_square t_pdf |
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983 clg is_stream t_rnd |
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984 com2str is_struct uniform_cdf |
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985 exponential_cdf is_symmetric uniform_inv |
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986 exponential_inv is_vector uniform_pdf |
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987 exponential_pdf isstr uniform_rnd |
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988 exponential_rnd lognormal_cdf weibcdf |
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989 f_cdf lognormal_inv weibinv |
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990 f_inv lognormal_pdf weibpdf |
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991 f_pdf lognormal_rnd weibrnd |
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992 f_rnd meshdom weibull_cdf |
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993 gamma_cdf normal_cdf weibull_inv |
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994 gamma_inv normal_inv weibull_pdf |
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995 gamma_pdf normal_pdf weibull_rnd |
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996 gamma_rnd normal_rnd wiener_rnd |
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997 geometric_cdf pascal_cdf |
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998 geometric_inv pascal_inv |
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999 |
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1000 The following functions are now deprecated in Octave 3.2 and will |
|
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1001 be removed from Octave 3.6 (or whatever version is the second major |
|
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1002 release after 3.2): |
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1003 |
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1004 create_set spcholinv spmax |
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1005 dmult spcumprod spmin |
|
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1006 iscommand spcumsum spprod |
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1007 israwcommand spdet spqr |
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1008 lchol spdiag spsum |
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1009 loadimage spfind spsumsq |
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1010 mark_as_command spinv str2mat |
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1011 mark_as_rawcommand spkron unmark_command |
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1012 spatan2 splchol unmark_rawcommand |
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1013 spchol split |
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|
1014 spchol2inv splu |
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|
1015 |
|
7990
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7279
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|
1016 See NEWS.3 for old news. |