Mercurial > hg > octave-lyh
annotate NEWS @ 13749:62d1f56b0be7
New nthargout function
* nthargout.m: New function.
* func.txi (Multiple Return Values): document nthargout.
* module.mk (general_FCN_FILES): Add nthargout.m
* help.cc (varargin, varargout): Cross-reference other arg functions.
* ov-user-fucn.cc (nargin, nargout, isargout): Ditto.
* NEWS (3.6): Mention this new file.
| author | Jordi Gutiérrez Hermoso <jordigh@octave.org> |
|---|---|
| date | Tue, 25 Oct 2011 09:46:38 -0700 |
| parents | 7ff0bdc3dc4c |
| children | 5f71ab377898 2eea4a2e6463 |
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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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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 ** Certain string functions have been modified for greater Matlab compatibility |
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40 and for 15X greater performance when operating on cell array of strings. |
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41 |
| 13262 | 42 deblank: Now requires character or cellstr input. |
| 43 strtrim: Now requires character or cellstr input. | |
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44 No longer trims nulls ("\0") from string for ML compatibility. |
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45 strmatch: Follows documentation precisely and ignores trailing spaces |
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46 in pattern and in string. Note that Matlab documents this |
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47 behavior but the implementation does *not* always follow it. |
| 13262 | 48 |
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49 ** Geometry functions derived from Qhull (convhull, delaunay, voronoi) |
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50 have been revamped. The options passed to the underlying qhull command |
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51 have been changed for better results or for Matlab compatibility. |
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52 |
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53 convhull : Default options are "Qt" for 2D, 3D, 4D inputs |
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54 Default options are "Qt Qx" for 5D and higher |
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55 delaunay : Default options are "Qt Qbb Qc Qz" for 2D and 3D inputs |
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56 Default options are "Qt Qbb Qc Qx" for 4D and higher |
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57 voronoi : No default arguments |
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58 |
| 13262 | 59 ** Matlab-compatible preference functions: |
| 60 | |
| 61 addpref getpref ispref rmpref setpref | |
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62 |
| 13262 | 63 ** Other miscellaneous new functions: |
| 64 | |
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65 nthargout |
| 13262 | 66 iscolumn |
| 67 issrow | |
| 68 zscore | |
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69 |
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70 ** Deprecated functions. |
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71 |
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72 The following functions were deprecated in Octave 3.2 and have been |
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73 removed from Octave 3.6. |
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74 |
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75 create_set spcholinv splu |
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76 dmult spcumprod spmax |
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77 iscommand spcumsum spmin |
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78 israwcommand spdet spprod |
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79 lchol spdiag spqr |
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80 loadimage spfind spsum |
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81 mark_as_command sphcat spsumsq |
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82 mark_as_rawcommand spinv spvcat |
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83 spatan2 spkron str2mat |
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84 spchol splchol unmark_command |
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85 spchol2inv split unmark_rawcommand |
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86 |
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87 The following functions have been deprecated in Octave 3.6 and will |
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88 be removed from Octave 3.10 (or whatever version is the second major |
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89 release after 3.6): |
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90 |
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91 cut is_duplicate_entry |
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92 cor polyderiv |
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93 corrcoef studentize |
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94 __error_text__ sylvester_matrix |
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95 error_text |
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96 |
| 13251 | 97 Summary of important user-visible changes for version 3.4.3: |
| 98 ----------------------------------------------------------- | |
| 99 | |
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100 ** Octave 3.4.3 is a bug fixing release. |
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101 |
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102 Summary of important user-visible changes for version 3.4.2: |
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103 ----------------------------------------------------------- |
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104 |
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105 ** Octave 3.4.2 fixes some minor installation problems that affected |
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106 version 3.4.1. |
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107 |
| 12709 | 108 Summary of important user-visible changes for version 3.4.1: |
| 109 ----------------------------------------------------------- | |
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110 |
| 12709 | 111 ** Octave 3.4.1 is primarily a bug fixing release. |
| 112 | |
| 113 ** IMPORTANT note about binary incompatibility in this release: | |
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114 |
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115 Binary compatibility for all 3.4.x releases was originally planned, |
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116 but this is impossible for the 3.4.1 release due to a bug in the way |
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117 shared libraries were built in Octave 3.4.0. Because of this bug, |
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118 .oct files built for Octave 3.4.0 must be recompiled before they |
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119 will work with Octave 3.4.1. |
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120 |
| 12709 | 121 Given that there would be binary incompatibilities with shared |
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122 libraries going from Octave 3.4.0 to 3.4.1, the following |
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123 incompatible changes were also made in this release: |
| 12709 | 124 |
| 125 * The Perl Compatible Regular Expression (PCRE) library is now | |
| 126 required to build Octave. | |
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127 |
| 12712 | 128 * Octave's libraries and .oct files are now installed in |
| 129 subdirectories of $libdir instead of $libexecdir. | |
| 130 | |
| 12709 | 131 Any future Octave 3.4.x release versions should remain binary |
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132 compatible with Octave 3.4.1 as proper library versioning is now |
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133 being used as recommended by the libtool manual. |
| 12709 | 134 |
| 135 ** The following functions have been deprecated in Octave 3.4.1 and will | |
| 136 be removed from Octave 3.8 (or whatever version is the second major | |
| 137 release after 3.4): | |
| 138 | |
| 139 cquad is_duplicate_entry perror strerror | |
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140 |
| 12709 | 141 ** The following functions are new in 3.4.1: |
| 142 | |
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143 colstyle gmres iscolumn isrow mgorth nproc rectangle |
| 12709 | 144 |
| 145 ** The get_forge_pkg function is now private. | |
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146 |
| 12709 | 147 ** The rectangle_lw, rectangle_sw, triangle_lw, and triangle_sw |
| 148 functions are now private. | |
| 149 | |
| 150 ** The logistic_regression_derivatives and logistic_regression_likelihood | |
| 151 functions are now private. | |
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152 |
| 12739 | 153 ** ChangeLog files in the Octave sources are no longer maintained |
| 154 by hand. Instead, there is a single ChangeLog file generated from | |
| 155 the Mercurial version control commit messages. Older ChangeLog | |
| 156 information can be found in the etc/OLD-ChangeLogs directory in the | |
| 157 source distribution. | |
| 158 | |
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159 Summary of important user-visible changes for version 3.4: |
| 9352 | 160 --------------------------------------------------------- |
| 161 | |
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162 ** BLAS and LAPACK libraries are now required to build Octave. The |
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163 subset of the reference BLAS and LAPACK libraries has been removed |
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164 from the Octave sources. |
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165 |
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166 ** The ARPACK library is now distributed with Octave so it no longer |
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168 Octave. |
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169 |
| 10118 | 170 ** The `lookup' function was extended to be more useful for |
| 171 general-purpose binary searching. Using this improvement, the | |
| 172 ismember function was rewritten for significantly better | |
| 173 performance. | |
| 9352 | 174 |
| 175 ** Real, integer and logical matrices, when used in indexing, will now | |
| 176 cache the internal index_vector value (zero-based indices) when | |
| 177 successfully used as indices, eliminating the conversion penalty for | |
| 10118 | 178 subsequent indexing by the same matrix. In particular, this means it |
| 179 is no longer needed to avoid repeated indexing by logical arrays | |
| 180 using find for performance reasons. | |
| 9888 | 181 |
| 10118 | 182 ** Logical matrices are now treated more efficiently when used as |
| 183 indices. Octave will keep the index as a logical mask unless the | |
| 184 ratio of true elements is small enough, using a specialized | |
| 185 code. Previously, all logical matrices were always first converted | |
| 186 to index vectors. This results in savings in both memory and | |
| 187 computing time. | |
| 9480 | 188 |
| 10118 | 189 ** The `sub2ind' and `ind2sub' functions were reimplemented as compiled |
| 190 functions for better performance. These functions are now faster, | |
| 191 can deliver more economized results for ranges, and can reuse the | |
| 192 index cache mechanism described in previous paragraph. | |
| 193 | |
| 194 ** The built-in function equivalents to associative operators (`plus', | |
| 195 `times', `mtimes', `and', and `or') have been extended to accept | |
| 196 multiple arguments. This is especially useful for summing | |
| 197 (multiplying, etc.) lists of objects (of possibly distinct types): | |
| 9408 | 198 |
| 9449 | 199 matrix_sum = plus (matrix_list{:}); |
| 200 | |
| 10118 | 201 ** An FTP object type based on libcurl has been implemented. These |
| 202 objects allow ftp connections, downloads and uploads to be | |
| 203 managed. For example, | |
| 9880 | 204 |
| 10118 | 205 fp = ftp ("ftp.octave.org); |
| 206 cd (fp, "gnu/octave"); | |
| 207 mget (fp, "octave-3.2.3.tar.bz2"); | |
| 208 close (fp); | |
| 9880 | 209 |
| 10118 | 210 ** The default behavior of `assert (observed, expected)' has been |
| 211 relaxed to employ less strict checking that does not require the | |
| 212 internals of the values to match. This avoids previously valid | |
| 213 tests from breaking due to new internal classes introduced in future | |
| 214 Octave versions. | |
| 9449 | 215 |
| 216 For instance, all of these assertions were true in Octave 3.0.x | |
| 217 but false in 3.2.x due to new optimizations and improvements: | |
| 218 | |
| 219 assert (2*linspace (1, 5, 5), 2*(1:5)) | |
| 220 assert (zeros (0, 0), []) | |
| 221 assert (2*ones (1, 5), (2) (ones (1,5))) | |
| 9462 | 222 |
| 10118 | 223 ** The behavior of library functions `ismatrix', `issquare', and |
| 224 `issymmetric' has been changed for better consistency. | |
| 9873 | 225 |
| 10292 | 226 * The `ismatrix' function now returns true for all numeric, |
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227 logical and character 2-D or N-D matrices. Previously, `ismatrix' |
| 10292 | 228 returned false if the first or second dimension was zero. |
| 229 Hence, `ismatrix ([])' was false, | |
| 230 while `ismatrix (zeros (1,2,0))' was true. | |
| 9873 | 231 |
| 10118 | 232 * The `issquare' function now returns a logical scalar, and is |
| 233 equivalent to the expression | |
| 234 | |
| 235 ismatrix (x) && ndims (x) == 2 && rows (x) == columns (x) | |
| 236 | |
| 237 The dimension is no longer returned. As a result, `issquare ([])' | |
| 238 now yields true. | |
| 9873 | 239 |
| 10118 | 240 * The `issymmetric' function now checks for symmetry instead of |
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241 Hermitianness. For the latter, ishermitian was created. Also, |
| 10118 | 242 logical scalar is returned rather than the dimension, so |
| 243 `issymmetric ([])' is now true. | |
| 9873 | 244 |
| 10118 | 245 ** Function handles are now aware of overloaded functions. If a |
| 246 function is overloaded, the handle determines at the time of its | |
| 247 reference which function to call. A non-overloaded version does not | |
| 248 need to exist. | |
| 9873 | 249 |
| 10118 | 250 ** Overloading functions for built-in classes (double, int8, cell, |
| 251 etc.) is now compatible with Matlab. | |
| 9408 | 252 |
| 10323 | 253 ** Function handles can now be compared with the == and != operators, |
| 254 as well as the `isequal' function. | |
| 255 | |
| 10118 | 256 ** Performance of concatenation (using []) and the functions `cat', |
| 257 `horzcat', and `vertcat' has been improved for multidimensional | |
| 258 arrays. | |
| 10117 | 259 |
| 9547 | 260 ** The operation-assignment operators +=, -=, *= and /= now behave more |
| 10118 | 261 efficiently in certain cases. For instance, if M is a matrix and S a |
| 262 scalar, then the statement | |
| 9547 | 263 |
| 10118 | 264 M += S; |
| 9547 | 265 |
| 10118 | 266 will operate on M's data in-place if it is not shared by another |
| 267 variable, usually increasing both time and memory efficiency. | |
| 9547 | 268 |
| 9558 | 269 Only selected common combinations are affected, namely: |
| 9547 | 270 |
| 271 matrix += matrix | |
| 272 matrix -= matrix | |
| 9558 | 273 matrix .*= matrix |
| 274 matrix ./= matrix | |
| 275 | |
| 9547 | 276 matrix += scalar |
| 277 matrix -= scalar | |
| 278 matrix *= scalar | |
| 279 matrix /= scalar | |
| 9558 | 280 |
| 9552 | 281 logical matrix |= logical matrix |
| 282 logical matrix &= logical matrix | |
| 9547 | 283 |
| 10118 | 284 where matrix and scalar belong to the same class. The left-hand |
| 285 side must be a simple variable reference. | |
| 9888 | 286 |
| 10118 | 287 Moreover, when unary operators occur in expressions, Octave will |
| 288 also try to do the operation in-place if it's argument is a | |
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289 temporary expression. |
| 9589 | 290 |
| 10118 | 291 ** The effect of comparison operators (<, >, <=, and >=) applied to |
| 292 complex numbers has changed to be consistent with the strict | |
| 293 ordering defined by the `max', `min', and `sort' functions. More | |
| 294 specifically, complex numbers are compared by lexicographical | |
| 295 comparison of the pairs `[abs(z), arg(z)]'. Previously, only real | |
| 296 parts were compared; this can be trivially achieved by wrapping the | |
| 297 operands in real(). | |
| 9547 | 298 |
| 10118 | 299 ** The automatic simplification of complex computation results has |
| 300 changed. Octave will now simplify any complex number with a zero | |
| 301 imaginary part or any complex matrix with all elements having zero | |
| 302 imaginary part to a real value. Previously, this was done only for | |
| 303 positive zeros. Note that the behavior of the complex function is | |
| 304 unchanged and it still produces a complex value even if the | |
| 305 imaginary part is zero. | |
| 9826 | 306 |
| 10118 | 307 ** As a side effect of code refactoring in liboctave, the binary |
| 308 logical operations are now more easily amenable to compiler | |
| 309 optimizations and are thus significantly faster. | |
| 9595 | 310 |
| 10118 | 311 ** Octave now allows user-defined `subsasgn' methods to optimize out |
| 312 redundant copies. For more information, see the manual. | |
| 9595 | 313 |
| 10453 | 314 ** More efficient matrix division handling. Octave is now able to |
| 10118 | 315 handle the expressions |
| 9664 | 316 |
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317 M' \ V |
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318 M.' \ V |
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319 V / M |
| 9664 | 320 |
| 10118 | 321 (M is a matrix and V is a vector) more efficiently in certain cases. |
| 322 In particular, if M is triangular, all three expressions will be | |
| 323 handled by a single call to xTRTRS (from LAPACK), with appropriate | |
| 10453 | 324 flags. Previously, all three expressions required a physical |
| 10118 | 325 transpose of M. |
| 9664 | 326 |
| 10118 | 327 ** More efficient handling of certain mixed real-complex matrix |
| 328 operations. For instance, if RM is a real matrix and CM a complex | |
| 329 matrix, | |
| 9664 | 330 |
| 10118 | 331 RM * CM |
| 9664 | 332 |
| 333 can now be evaluated either as | |
| 334 | |
| 335 complex (RM * real (CM), RM * imag (CM)) | |
| 336 | |
| 337 or as | |
| 338 | |
| 339 complex (RM) * CM, | |
| 340 | |
| 10453 | 341 depending on the dimensions. The first form requires more |
| 342 temporaries and copying, but halves the FLOP count, which normally | |
| 343 brings better performance if RM has enough rows. Previously, the | |
| 344 second form was always used. | |
| 9664 | 345 |
| 11111 | 346 Matrix division is similarly affected. |
| 9664 | 347 |
| 10118 | 348 ** More efficient handling of triangular matrix factors returned from |
| 349 factorizations. The functions for computing QR, LU and Cholesky | |
| 350 factorizations will now automatically return the triangular matrix | |
| 351 factors with proper internal matrix_type set, so that it won't need | |
| 352 to be computed when the matrix is used for division. | |
| 9717 | 353 |
| 10118 | 354 ** The built-in `sum' function now handles the non-native summation |
| 355 (i.e., double precision sum of single or integer inputs) more | |
| 356 efficiently, avoiding a temporary conversion of the whole input | |
| 357 array to doubles. Further, `sum' can now accept an extra option | |
| 358 argument, using a compensated summation algorithm rather than a | |
| 359 straightforward sum, which significantly improves precision if lots | |
| 360 of cancellation occurs in the summation. | |
| 9717 | 361 |
| 10118 | 362 ** The built-in `bsxfun' function now uses optimized code for certain |
| 363 cases where built-in operator handles are passed in. Namely, the | |
| 364 optimizations concern the operators `plus', `minus', `times', | |
| 365 `ldivide', `rdivide', `power', `and', `or' (for logical arrays), | |
| 366 the relational operators `eq', `ne', `lt', `le', `gt', `ge', and the | |
| 367 functions `min' and `max'. Optimizations only apply when both | |
| 368 operands are of the same built-in class. Mixed real/complex and | |
| 369 single/double operations will first convert both operands to a | |
| 370 common type. | |
| 9745 | 371 |
| 10118 | 372 ** The `strfind' and `strrep' functions now have compiled |
| 373 implementations, facilitating significantly more efficient searching | |
| 374 and replacing in strings, especially with longer patterns. The code | |
| 375 of `strcat' has been vectorized and is now much more efficient when | |
| 376 many strings are concatenated. The `strcmpi' and `strncmpi' | |
| 377 functions are now built-in functions, providing better performance. | |
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378 |
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379 ** 'str2double' now has a compiled implementation and the API conforms |
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380 to Matlab. The additional Octave-specific features of returning a |
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381 boolean matrix indicating which elements were successfully converted |
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382 has been removed. |
| 10208 | 383 |
| 10453 | 384 ** Matlab-style ignoring input and output function arguments using |
| 11111 | 385 tilde (~) is now supported. Ignored output arguments may be |
| 386 detected from a function using the built-in function `isargout'. | |
| 387 For more details, consult the manual. | |
| 10886 | 388 |
| 10453 | 389 ** The list datatype, deprecated since the introduction of cells, has |
| 390 been removed. | |
| 10276 | 391 |
| 10453 | 392 ** The accumarray function has been optimized and is now significantly |
| 393 faster in certain important cases. | |
| 10054 | 394 |
| 10292 | 395 ** The behavior of isreal and isnumeric functions was changed to be more |
| 396 Matlab-compatible. | |
| 397 | |
| 10406 | 398 ** The integer math & conversion warnings (Octave:int-convert-nan, |
| 399 Octave:int-convert-non-int-val, Octave:int-convert-overflow, | |
| 11111 | 400 Octave:int-math-overflow) have been removed. |
| 10406 | 401 |
| 10453 | 402 ** rem and mod are now built-in functions. They also handle integer |
| 403 types efficiently using integer arithmetic. | |
| 10437 | 404 |
| 10536 | 405 ** Sparse indexing and indexed assignment has been mostly rewritten. |
| 406 Since Octave uses compressed column storage for sparse matrices, | |
| 407 major attention is devoted to operations manipulating whole columns. | |
| 408 Such operations are now significantly faster, as well as some other | |
| 409 important cases. | |
| 410 | |
| 411 Further, it is now possible to pre-allocate a sparse matrix and | |
| 412 subsequently fill it by assignments, provided they meet certain | |
| 413 conditions. For more information, consult the `spalloc' function, | |
| 414 which is no longer a mere dummy. Consequently, nzmax and nnz are no | |
| 11111 | 415 longer always equal in Octave. Octave may also produce a matrix |
| 416 with nnz < nzmax as a result of other operations, so you should | |
| 417 consistently use nnz unless you really want to use nzmax (i.e. the | |
| 418 space allocated for nonzero elements). | |
| 10536 | 419 |
| 420 Sparse concatenation is also affected, and concatenating sparse | |
| 421 matrices, especially larger collections, is now significantly more | |
| 11111 | 422 efficient. This applies to both the [] operator and the |
| 10536 | 423 cat/vertcat/horzcat functions. |
| 424 | |
| 11111 | 425 ** It is now possible to optionally employ the xGESDD LAPACK drivers |
| 426 for computing the singular value decomposition using svd(), instead | |
| 427 of the default xGESVD, using the configuration pseudo-variable | |
| 428 svd_driver. The xGESDD driver can be up to 6x times faster when | |
| 429 singular vectors are requested, but is reported to be somewhat less | |
| 10639 | 430 robust on highly ill-conditioned matrices. |
| 431 | |
| 432 ** Configuration pseudo-variables, such as page_screen_output or | |
| 433 confirm_recursive_rmdir (or the above mentioned svd_driver), now | |
| 434 accept a "local" option as second argument, requesting the change | |
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435 to be undone when the current function returns: |
| 10639 | 436 |
| 437 function [status, msg] = rm_rf (dir) | |
| 438 confirm_recursive_rmdir (false, "local"); | |
| 439 [status, msg] = rmdir (dir, "s"); | |
| 440 ... | |
| 441 endfunction | |
| 442 | |
| 443 Upon return, confirm_recursive_rmdir will be restored to the value | |
| 444 it had on entry to the function, even if there were subsequent | |
| 445 changes to the variable in function rm_rf or any of the functions | |
| 446 it calls. | |
| 447 | |
| 11111 | 448 ** pkg now accepts a -forge option for downloading and installing |
| 449 packages from Octave Forge automatically. For example, | |
| 10774 | 450 |
| 451 pkg install -forge general | |
| 452 | |
| 11111 | 453 will automatically download the latest release of the general |
| 454 package and attempt to install it. No automatic resolving of | |
| 455 dependencies is provided. Further, | |
| 10639 | 456 |
| 10774 | 457 pkg list -forge |
| 458 | |
| 459 can be used to list all available packages. | |
| 460 | |
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461 ** The internal data representation of structs has been completely |
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462 rewritten to make certain optimizations feasible. The field data |
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463 can now be shared between structs with equal keys but different |
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464 dimensions or values, making operations that preserve the fields |
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465 faster. Economized storage is now used for scalar structs (just |
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466 like most other scalars), making their usage more |
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467 memory-efficient. Certain array-like operations on structs |
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468 (concatenation, uniform cellfun, num2cell) have gained a |
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469 significant speed-up. Additionally, the octave_scalar_map class |
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470 now provides a simpler interface to work with scalar structs within |
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471 a C++ DLD function. |
| 10639 | 472 |
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473 ** Two new formats are available for displaying numbers: |
| 11111 | 474 |
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475 format short eng |
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476 format long eng |
| 11111 | 477 |
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478 Both display numbers in engineering notation, i.e., mantissa + |
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479 exponent where the exponent is a multiple of 3. |
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480 |
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481 ** The following functions are new in Octave 3.4: |
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482 accumdim erfcx nfields pqpnonneg uigetdir |
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483 bitpack fileread nth_element quadcc uigetfile |
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484 bitunpack fminbnd onCleanup randi uiputfile |
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485 blkmm fskipl pbaspect repelems uimenu |
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486 cbrt ifelse pie3 reset whitebg |
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487 curl ishermitian powerset rsf2csf |
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488 chop isindex ppder saveas |
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489 daspect luupdate ppint strread |
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490 divergence merge ppjumps textread |
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491 |
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492 ** Using the image function to view images with external programs such |
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493 as display, xv, and xloadimage is no longer supported. The |
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494 image_viewer function has also been removed. |
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495 |
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496 ** The behavior of struct assignments to non-struct values has been |
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497 changed. Previously, it was possible to overwrite an arbitrary |
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498 value: |
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499 |
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500 a = 1; |
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501 a.x = 2; |
| 10873 | 502 |
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503 This is no longer possible unless a is an empty matrix or cell |
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504 array. |
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505 |
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506 ** The dlmread function has been extended to allow specifying a custom |
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507 value for empty fields. |
| 10829 | 508 |
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509 ** The dlmread and dlmwrite functions have been modified to accept |
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510 file IDs (as returned by fopen) in addition to file names. |
| 11111 | 511 |
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512 ** Octave can now optimize away the interpreter overhead of an |
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513 anonymous function handle, if the function simply calls another |
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514 function or handle with some of its parameters bound to certain |
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515 values. Example: |
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516 |
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517 f = @(x) sum (x, 1); |
| 10966 | 518 |
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519 When f is called, the call is forwarded to @sum with the constant 1 |
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520 appended, and the anonymous function call does not occur on the |
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521 call stack. |
| 10829 | 522 |
| 12424 | 523 ** For compatibility with Matlab, mu2lin (x) is now equivalent to |
| 524 mu2lin (x, 0). | |
| 525 | |
| 526 ** The new function `history_control' may be used to control the way | |
| 527 command lines are added to the history list when Octave is using | |
| 528 readline for command-line editing. For example | |
| 529 | |
| 530 history_control ("ignoredups") | |
| 531 | |
| 532 tells Octave to avoid adding duplicate lines to the history list. | |
| 533 | |
| 534 ** Octave now uses the gnulib library for improved portability and to | |
| 535 avoid bugs in operating system functions. | |
| 536 | |
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537 ** Deprecated functions. |
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538 |
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539 The following functions were deprecated in Octave 3.0 and have been |
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540 removed from Octave 3.4. |
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541 |
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542 beta_cdf geometric_pdf pascal_pdf |
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543 beta_inv geometric_rnd pascal_rnd |
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544 beta_pdf hypergeometric_cdf poisson_cdf |
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545 beta_rnd hypergeometric_inv poisson_inv |
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546 binomial_cdf hypergeometric_pdf poisson_pdf |
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547 binomial_inv hypergeometric_rnd poisson_rnd |
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548 binomial_pdf intersection polyinteg |
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549 binomial_rnd is_bool setstr |
|
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550 chisquare_cdf is_complex struct_contains |
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551 chisquare_inv is_list struct_elements |
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552 chisquare_pdf is_matrix t_cdf |
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553 chisquare_rnd is_scalar t_inv |
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554 clearplot is_square t_pdf |
|
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555 clg is_stream t_rnd |
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556 com2str is_struct uniform_cdf |
|
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557 exponential_cdf is_symmetric uniform_inv |
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558 exponential_inv is_vector uniform_pdf |
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559 exponential_pdf isstr uniform_rnd |
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560 exponential_rnd lognormal_cdf weibcdf |
|
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561 f_cdf lognormal_inv weibinv |
|
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562 f_inv lognormal_pdf weibpdf |
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563 f_pdf lognormal_rnd weibrnd |
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564 f_rnd meshdom weibull_cdf |
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565 gamma_cdf normal_cdf weibull_inv |
|
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|
566 gamma_inv normal_inv weibull_pdf |
|
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|
567 gamma_pdf normal_pdf weibull_rnd |
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568 gamma_rnd normal_rnd wiener_rnd |
|
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|
569 geometric_cdf pascal_cdf |
|
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|
570 geometric_inv pascal_inv |
|
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|
571 |
|
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572 The following functions were deprecated in Octave 3.2 and will |
|
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573 be removed from Octave 3.6 (or whatever version is the second major |
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574 release after 3.2): |
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575 |
|
11390
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576 create_set spcholinv splu |
|
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577 dmult spcumprod spmax |
|
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578 iscommand spcumsum spmin |
|
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579 israwcommand spdet spprod |
|
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580 lchol spdiag spqr |
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|
581 loadimage spfind spsum |
|
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582 mark_as_command sphcat spsumsq |
|
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|
583 mark_as_rawcommand spinv spvcat |
|
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|
584 spatan2 spkron str2mat |
|
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585 spchol splchol unmark_command |
|
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586 spchol2inv split unmark_rawcommand |
|
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587 |
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588 The following functions have been deprecated in Octave 3.4 and will |
|
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|
589 be removed from Octave 3.8 (or whatever version is the second major |
|
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590 release after 3.4): |
|
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591 |
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592 autocor cellidx gammai krylovb saveimage |
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593 autocov dispatch glpkmex perror strerror |
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594 betai fstat is_global replot values |
|
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|
595 |
|
7990
86dae6e5b83c
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|
596 Summary of important user-visible changes for version 3.2: |
| 5913 | 597 --------------------------------------------------------- |
| 2452 | 598 |
| 8737 | 599 ** Compatibility with Matlab graphics has been improved. |
| 6329 | 600 |
|
8070
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601 The hggroup object and associated listener callback functions have |
| 8737 | 602 been added allowing the inclusion of group objects. Data sources |
|
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603 have been added to these group objects such that |
|
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|
604 |
|
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605 x = 0:0.1:10; |
|
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606 y = sin (x); |
|
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|
607 plot (x, y, "ydatasource", "y"); |
|
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|
608 for i = 1 : 100 |
|
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|
609 pause(0.1) |
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610 y = sin (x + 0.1 * i); |
|
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611 refreshdata(); |
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612 endfor |
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613 |
| 8737 | 614 works as expected. This capability has be used to introduce |
|
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615 stem-series, bar-series, etc., objects for better Matlab |
| 8737 | 616 compatibility. |
| 617 | |
| 618 ** New graphics functions: | |
| 619 | |
|
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620 addlistener ezcontour gcbo refresh |
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621 addproperty ezcontourf ginput refreshdata |
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622 allchild ezmesh gtext specular |
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623 available_graphics_toolkits ezmeshc intwarning surfl |
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624 graphics_toolkit ezplot ishghandle trisurf |
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625 cla ezplot3 isocolors waitforbuttonpress |
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626 clabel ezpolar isonormals |
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627 comet ezsurf isosurface |
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628 dellistener findall linkprop |
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|
629 diffuse gcbf plotmatrix |
|
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630 |
| 8737 | 631 ** New experimental OpenGL/FLTK based plotting system. |
| 632 | |
| 633 An experimental plotting system based on OpenGL and the FLTK | |
|
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634 toolkit is now part of Octave. This graphics toolkit is disabled by |
| 8737 | 635 default. You can switch to using it with the command |
|
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636 |
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|
637 graphics_toolkit ("fltk") |
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638 |
|
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639 for all future figures or for a particular figure with the command |
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640 |
|
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641 graphics_toolkit (h, "fltk") |
|
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642 |
| 11139 | 643 where "h" is a valid figure handle. |
|
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|
644 |
| 8737 | 645 ** Functions providing direct access to gnuplot have been removed. |
| 646 | |
|
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|
647 The functions __gnuplot_plot__, __gnuplot_set__, __gnuplot_raw__, |
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648 __gnuplot_show__, __gnuplot_replot__, __gnuplot_splot__, |
| 8737 | 649 __gnuplot_save_data__ and __gnuplot_send_inline_data__ have been |
| 650 removed from Octave. These function were incompatible with the | |
| 651 high level graphics handle code. | |
| 6329 | 652 |
| 8885 | 653 ** The Control, Finance and Quaternion functions have been removed. |
| 654 | |
| 655 These functions are now available as separate packages from | |
| 656 | |
| 657 http://octave.sourceforge.net/packages.html | |
| 658 | |
| 659 and can be reinstalled using the Octave package manager (see | |
| 660 the pkg function). | |
| 661 | |
| 662 ** Specific sparse matrix functions removed. | |
| 663 | |
| 664 The following functions, which handled only sparse matrices have | |
| 665 been removed. Instead of calling these functions directly, you | |
| 666 should use the corresponding function without the "sp" prefix. | |
| 8737 | 667 |
| 8885 | 668 spatan2 spcumsum spkron spprod |
| 669 spchol spdet splchol spqr | |
| 670 spchol2inv spdiag splu spsum | |
| 671 spcholinv spfind spmax spsumsqk | |
| 672 spcumprod spinv spmin | |
| 673 | |
| 674 ** Improvements to the debugger. | |
| 675 | |
| 676 The interactive debugging features have been improved. Stopping | |
| 677 on statements with dbstop should work correctly now. Stepping | |
| 678 into and over functions, and stepping one statement at a time | |
| 679 (with dbstep) now works. Moving up and down the call stack with | |
| 680 dbup and dbdown now works. The dbstack function is now available | |
| 681 to print the current function call stack. The new dbquit function | |
| 682 is available to exit the debugging mode. | |
| 683 | |
| 684 ** Improved traceback error messages. | |
| 685 | |
| 686 Traceback error messages are much more concise and easier to | |
| 687 understand. They now display information about the function call | |
| 688 stack instead of the stack of all statements that were active at | |
| 689 the point of the error. | |
|
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690 |
| 8737 | 691 ** Object Oriented Programming. |
|
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692 |
| 8737 | 693 Octave now includes OOP features and the user can create their own |
| 694 class objects and overloaded functions and operators. For | |
| 695 example, all methods of a class called "myclass" will be found in | |
| 696 a directory "@myclass" on the users path. The class specific | |
| 697 versions of functions and operators take precedence over the | |
| 698 generic versions of these functions. | |
| 699 | |
| 700 New functions related to OOP include | |
| 7189 | 701 |
| 8737 | 702 class inferiorto isobject loadobj methods superiorto |
| 703 | |
| 704 See the Octave manual for more details. | |
| 7038 | 705 |
| 8747 | 706 ** Parsing of Command-style Functions. |
| 707 | |
| 708 Octave now parses command-style functions without needing to first | |
| 709 declare them with "mark_as_command". The rules for recognizing a | |
| 710 command-style function calls are | |
| 711 | |
| 712 * A command must appear as the first word in a statement, | |
| 713 followed by a space. | |
| 714 | |
| 715 * The first character after the space must not be '=' or '(' | |
| 716 | |
| 717 * The next token after the space must not look like a binary | |
| 718 operator. | |
| 719 | |
| 720 These rules should be mostly compatible with the way Matlab parses | |
| 721 command-style function calls and allow users to define commands in | |
| 722 .m files without having to mark them as commands. | |
| 723 | |
| 724 Note that previous versions of Octave allowed expressions like | |
| 725 | |
| 726 x = load -text foo.dat | |
| 727 | |
| 728 but an expression like this will now generate a parse error. In | |
| 729 order to assign the value returned by a function to a variable, | |
| 730 you must use the normal function call syntax: | |
| 731 | |
| 732 x = load ("-text", "foo.dat"); | |
| 733 | |
| 8737 | 734 ** Block comments. |
| 735 | |
| 8747 | 736 Commented code can be between matching "#{" and "#}" or "%{" and |
| 737 "%}" markers, even if the commented code spans several line. This | |
| 738 allows blocks code to be commented, without needing to comment | |
| 739 each line. For example, | |
| 5814 | 740 |
| 8747 | 741 function [s, t] = func (x, y) |
| 742 s = 2 * x; | |
| 743 #{ | |
| 744 s *= y; | |
| 745 t = y + x; | |
| 746 #} | |
|
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|
747 endfunction |
| 5814 | 748 |
| 8747 | 749 the lines "s *= y;" and "t = y + x" will not be executed. |
| 8737 | 750 |
|
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751 ** If any subfunction in a file ends with "end" or "endfunction", then |
|
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752 they all must end that way. Previously, Octave accepted |
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753 |
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|
754 function main () |
|
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755 ... |
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756 # no endfunction here. |
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|
757 function sub () |
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758 ... |
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759 endfunction |
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760 |
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761 but this is no longer allowed. |
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|
762 |
| 8737 | 763 ** Special treatment in the parser of expressions like "a' * b". |
| 2452 | 764 |
| 8737 | 765 In these cases the transpose is no longer explicitly formed and |
| 766 BLAS libraries are called with the transpose flagged, | |
| 767 significantly improving performance for these kinds of | |
| 768 operations. | |
|
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769 |
| 8737 | 770 ** Single Precision data type. |
| 2452 | 771 |
| 8737 | 772 Octave now includes a single precision data type. Single |
| 773 precision variables can be created with the "single" command, or | |
|
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774 from functions like ones, eye, etc. For example, |
| 5995 | 775 |
| 8737 | 776 single (1) |
| 777 ones (2, 2, "single") | |
| 778 zeros (2, 2, "single") | |
| 779 eye (2, 2, "single") | |
| 780 Inf (2, 2, "single") | |
| 781 NaN (2, 2, "single") | |
| 782 NA (2, 2, "single") | |
| 7279 | 783 |
| 8737 | 784 all create single precision variables. For compatibility with |
| 785 Matlab, mixed double/single precision operators and functions | |
| 786 return single precision types. | |
| 787 | |
| 788 As a consequence of this addition to Octave the internal | |
|
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|
789 representation of the double precision NA value has changed, and |
|
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|
790 so users that make use of data generated by Octave with R or |
|
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|
791 visa-versa are warned that compatibility might not be assured. |
| 7279 | 792 |
| 8737 | 793 ** Improved array indexing. |
| 794 | |
| 795 The underlying code used for indexing of arrays has been | |
|
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|
796 completely rewritten and indexing is now significantly faster. |
| 8737 | 797 |
| 8755 | 798 ** Improved memory management. |
| 799 | |
| 800 Octave will now attempt to share data in some cases where previously | |
| 801 a copy would be made, such as certain array slicing operations or | |
|
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|
802 conversions between cells, structs and cs-lists. This usually reduces |
| 8755 | 803 both time and memory consumption. |
| 9128 | 804 Also, Octave will now attempt to detect and optimize usage of a vector |
| 805 as a stack, when elements are being repeatedly inserted at/removed from | |
| 806 the end of the vector. | |
| 8755 | 807 |
| 8738 | 808 ** Improved performance for reduction operations. |
| 809 | |
| 8755 | 810 The performance of the sum, prod, sumsq, cumsum, cumprod, any, all, |
| 811 max and min functions has been significantly improved. | |
| 8738 | 812 |
| 9006 | 813 ** Sorting and searching. |
| 814 | |
| 815 The performance of sort has been improved, especially when sorting | |
| 10453 | 816 indices are requested. An efficient built-in issorted |
| 817 implementation was added. The sortrows function now uses a more | |
|
12702
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|
818 efficient algorithm, especially in the homogeneous case. The lookup |
| 10453 | 819 function is now a built-in function performing a binary search, |
| 820 optimized for long runs of close elements. Lookup also works with | |
| 821 cell arrays of strings. | |
| 9006 | 822 |
| 823 ** Range arithmetics | |
| 824 | |
| 10453 | 825 For some operations on ranges, Octave will attempt to keep the |
| 826 result as a range. These include negation, adding a scalar, | |
| 827 subtracting a scalar, and multiplying by a scalar. Ranges with zero | |
| 828 increment are allowed and can be constructed using the built-in | |
| 829 function `ones'. | |
| 9006 | 830 |
| 831 ** Various performance improvements. | |
| 832 | |
| 10453 | 833 Performance of a number of other built-in operations and functions |
| 834 was improved, including: | |
| 9006 | 835 |
| 836 * logical operations | |
| 837 * comparison operators | |
| 838 * element-wise power | |
| 839 * accumarray | |
| 840 * cellfun | |
| 841 * isnan | |
| 842 * isinf | |
| 843 * isfinite | |
| 844 * nchoosek | |
| 845 * repmat | |
| 846 * strcmp | |
| 847 | |
| 8737 | 848 ** 64-bit integer arithmetic. |
| 849 | |
| 850 Arithmetic with 64-bit integers (int64 and uint64 types) is fully | |
| 851 supported, with saturation semantics like the other integer types. | |
| 852 Performance of most integer arithmetic operations has been | |
| 853 improved by using integer arithmetic directly. Previously, Octave | |
| 854 performed integer math with saturation semantics by converting the | |
| 855 operands to double precision, performing the operation, and then | |
| 856 converting the result back to an integer value, truncating if | |
| 857 necessary. | |
| 858 | |
| 8885 | 859 ** Diagonal and permutation matrices. |
| 860 | |
| 861 The interpreter can now treat diagonal and permutation matrices as | |
| 862 special objects that store only the non-zero elements, rather than | |
| 863 general full matrices. Therefore, it is now possible to construct | |
| 864 and use these matrices in linear algebra without suffering a | |
| 865 performance penalty due to storing large numbers of zero elements. | |
| 866 | |
| 867 ** Improvements to fsolve. | |
| 868 | |
| 869 The fsolve function now accepts an option structure argument (see | |
| 870 also the optimset function). The INFO values returned from fsolve | |
| 871 have changed to be compatible with Matlab's fsolve function. | |
| 872 Additionally, fsolve is now able to solve overdetermined systems, | |
| 873 complex-differentiable complex systems, systems with a sparse | |
| 874 jacobian and can work in single precision if given single precision | |
|
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|
875 inputs. It can also be called recursively. |
| 8885 | 876 |
| 8737 | 877 ** Improvements to the norm function. |
| 878 | |
| 879 The norm function is now able to compute row or column norms of a | |
| 880 matrix in a single call, as well as general matrix p-norms. | |
| 881 | |
| 882 ** New functions for computing some eigenvalues or singular values. | |
| 883 | |
| 884 The eigs and svds functions have been included in Octave. These | |
| 885 functions require the ARPACK library (now distributed under a | |
| 886 GPL-compatible license). | |
| 887 | |
| 888 ** New QR and Cholesky factorization updating functions. | |
|
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|
889 |
| 8737 | 890 choldelete cholshift qrdelete qrshift |
| 891 cholinsert cholupdate qrinsert qrupdate | |
| 892 | |
| 893 ** New quadrature functions. | |
| 894 | |
| 895 dblquad quadgk quadv triplequad | |
| 896 | |
| 8885 | 897 ** New functions for reading and writing images. |
| 898 | |
| 899 The imwrite and imread functions have been included in Octave. | |
| 900 These functions require the GraphicsMagick library. The new | |
| 901 function imfinfo provides information about an image file (size, | |
| 902 type, colors, etc.) | |
| 903 | |
|
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904 ** The input_event_hook function has been replaced by the pair of |
|
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905 functions add_input_event_hook and remove_input_event_hook so that |
|
1500d0197484
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906 more than one hook function may be installed at a time. |
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907 |
| 8737 | 908 ** Other miscellaneous new functions. |
|
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909 |
|
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910 addtodate hypot reallog |
|
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|
911 bicgstab idivide realpow |
| 9006 | 912 cellslices info realsqrt |
| 913 cgs interp1q rectint | |
| 914 command_line_path isdebugmode regexptranslate | |
| 915 contrast isfloat restoredefaultpath | |
| 916 convn isstrprop roundb | |
| 917 cummin log1p rundemos | |
| 918 cummax lsqnonneg runlength | |
| 919 datetick matlabroot saveobj | |
| 920 display namelengthmax spaugment | |
| 921 expm1 nargoutchk strchr | |
| 922 filemarker pathdef strvcat | |
| 923 fstat perl subspace | |
| 924 full prctile symvar | |
| 925 fzero quantile treelayout | |
| 926 genvarname re_read_readline_init_file validatestring | |
| 927 histc | |
|
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|
928 |
| 8885 | 929 ** Changes to strcat. |
| 930 | |
| 931 The strcat function is now compatible with Matlab's strcat | |
| 932 function, which removes trailing whitespace when concatenating | |
| 933 character strings. For example | |
| 934 | |
| 935 strcat ('foo ', 'bar') | |
| 936 ==> 'foobar' | |
| 937 | |
| 938 The new function cstrcat provides the previous behavior of | |
| 939 Octave's strcat. | |
| 940 | |
| 941 ** Improvements to the help functions. | |
| 942 | |
|
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|
943 The help system has been mostly re-implemented in .m files to make |
| 8885 | 944 it easier to modify. Performance of the lookfor function has been |
| 945 greatly improved by caching the help text from all functions that | |
| 946 are distributed with Octave. The pkg function has been modified | |
| 947 to generate cache files for external packages when they are | |
| 948 installed. | |
| 949 | |
|
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|
950 ** Deprecated functions. |
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951 |
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952 The following functions were deprecated in Octave 3.0 and will be |
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953 removed from Octave 3.4 (or whatever version is the second major |
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954 release after 3.0): |
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955 |
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956 beta_cdf geometric_pdf pascal_pdf |
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957 beta_inv geometric_rnd pascal_rnd |
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958 beta_pdf hypergeometric_cdf poisson_cdf |
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959 beta_rnd hypergeometric_inv poisson_inv |
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960 binomial_cdf hypergeometric_pdf poisson_pdf |
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961 binomial_inv hypergeometric_rnd poisson_rnd |
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962 binomial_pdf intersection polyinteg |
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963 binomial_rnd is_bool setstr |
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964 chisquare_cdf is_complex struct_contains |
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965 chisquare_inv is_list struct_elements |
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966 chisquare_pdf is_matrix t_cdf |
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967 chisquare_rnd is_scalar t_inv |
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968 clearplot is_square t_pdf |
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969 clg is_stream t_rnd |
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970 com2str is_struct uniform_cdf |
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971 exponential_cdf is_symmetric uniform_inv |
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972 exponential_inv is_vector uniform_pdf |
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973 exponential_pdf isstr uniform_rnd |
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974 exponential_rnd lognormal_cdf weibcdf |
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975 f_cdf lognormal_inv weibinv |
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976 f_inv lognormal_pdf weibpdf |
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977 f_pdf lognormal_rnd weibrnd |
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978 f_rnd meshdom weibull_cdf |
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979 gamma_cdf normal_cdf weibull_inv |
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980 gamma_inv normal_inv weibull_pdf |
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981 gamma_pdf normal_pdf weibull_rnd |
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982 gamma_rnd normal_rnd wiener_rnd |
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983 geometric_cdf pascal_cdf |
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984 geometric_inv pascal_inv |
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985 |
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986 The following functions are now deprecated in Octave 3.2 and will |
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987 be removed from Octave 3.6 (or whatever version is the second major |
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988 release after 3.2): |
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989 |
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990 create_set spcholinv spmax |
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991 dmult spcumprod spmin |
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992 iscommand spcumsum spprod |
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993 israwcommand spdet spqr |
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994 lchol spdiag spsum |
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995 loadimage spfind spsumsq |
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996 mark_as_command spinv str2mat |
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997 mark_as_rawcommand spkron unmark_command |
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998 spatan2 splchol unmark_rawcommand |
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999 spchol split |
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1000 spchol2inv splu |
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1001 |
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7990
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1002 See NEWS.3 for old news. |