Mercurial > hg > octave-nkf
annotate NEWS @ 13687:59fd35807941 gui
New GUI branch
| author | Jordi Gutiérrez Hermoso <jordigh@octave.org> |
|---|---|
| date | Wed, 12 Oct 2011 13:45:43 -0500 |
| parents | 571557ddabb9 |
| children | 5f71ab377898 |
| rev | line source |
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1 Summary of important user-visible changes for version 4.0: |
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2 --------------------------------------------------------- |
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3 |
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4 ** A new GUI is now available with Octave. |
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5 |
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6 Summary of important user-visible changes for version 3.6: |
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7 --------------------------------------------------------- |
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8 |
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9 ** The PCRE library is now required to build Octave. |
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10 |
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11 ** Octave now features a profiler, thanks to the work of Daniel Kraft |
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12 under the Google Summer of Code mentorship program. The manual has |
| 13262 | 13 been updated to reflect this addition. The new user-visible |
| 14 functions are profexplore, profile, and profshow. | |
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15 |
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16 ** Overhaul of statistical distribution functions |
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17 |
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18 Functions now return "single" outputs for inputs of class "single". |
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19 |
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20 75% reduction in memory usage through use of logical indexing. |
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21 |
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22 Random sample functions now use the same syntax as rand() and accept |
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23 a comma separated list of dimensions or a dimension vector. |
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24 |
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25 Functions have been made Matlab-compatible with regard to special |
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26 cases (probability on boundaries, probabilities for values outside |
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27 distribution, etc.). This may cause subtle changes to existing |
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28 scripts. |
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29 |
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30 negative binomial function has been extended to real, non-integer inputs. |
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31 discrete_inv() now returns v(1) for 0 instead of NaN. |
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32 nbincdf() recoded to use closed form solution with betainc(). |
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33 |
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34 ** strread, textscan, and textread have been completely revamped. |
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35 |
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36 They now support nearly all Matlab functionality including: |
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37 |
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38 * ML-compatible whitespace and delimiter defaults |
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39 |
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40 * ML-compatible options: 'whitespace', treatasempty', |
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41 format string repeat count, user-specified comment style, uneven-length |
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42 output arrays, %n and %u conversion specifiers (provisionally) |
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43 |
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44 ** Certain string functions have been modified for greater Matlab compatibility |
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45 and for 15X greater performance when operating on cell array of strings. |
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46 |
| 13262 | 47 deblank: Now requires character or cellstr input. |
| 48 strtrim: Now requires character or cellstr input. | |
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49 No longer trims nulls ("\0") from string for ML compatibility. |
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50 strmatch: Follows documentation precisely and ignores trailing spaces |
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51 in pattern and in string. Note that Matlab documents this |
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52 behavior but the implementation does *not* always follow it. |
| 13262 | 53 |
| 54 ** Matlab-compatible preference functions: | |
| 55 | |
| 56 addpref getpref ispref rmpref setpref | |
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57 |
| 13262 | 58 ** Other miscellaneous new functions: |
| 59 | |
| 60 iscolumn | |
| 61 issrow | |
| 62 zscore | |
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63 |
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64 ** Deprecated functions. |
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65 |
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66 The following functions were deprecated in Octave 3.2 and have been |
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67 removed from Octave 3.6. |
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68 |
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69 create_set spcholinv splu |
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70 dmult spcumprod spmax |
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71 iscommand spcumsum spmin |
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72 israwcommand spdet spprod |
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73 lchol spdiag spqr |
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74 loadimage spfind spsum |
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75 mark_as_command sphcat spsumsq |
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76 mark_as_rawcommand spinv spvcat |
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77 spatan2 spkron str2mat |
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78 spchol splchol unmark_command |
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79 spchol2inv split unmark_rawcommand |
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80 |
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81 The following functions have been deprecated in Octave 3.6 and will |
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82 be removed from Octave 3.10 (or whatever version is the second major |
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83 release after 3.6): |
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84 |
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85 cut is_duplicate_entry |
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86 cor polyderiv |
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87 corrcoef studentize |
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88 __error_text__ sylvester_matrix |
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89 error_text |
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90 |
| 13251 | 91 Summary of important user-visible changes for version 3.4.3: |
| 92 ----------------------------------------------------------- | |
| 93 | |
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94 ** Octave 3.4.3 is a bug fixing release. |
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95 |
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96 Summary of important user-visible changes for version 3.4.2: |
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97 ----------------------------------------------------------- |
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98 |
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99 ** Octave 3.4.2 fixes some minor installation problems that affected |
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100 version 3.4.1. |
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101 |
| 12709 | 102 Summary of important user-visible changes for version 3.4.1: |
| 103 ----------------------------------------------------------- | |
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104 |
| 12709 | 105 ** Octave 3.4.1 is primarily a bug fixing release. |
| 106 | |
| 107 ** IMPORTANT note about binary incompatibility in this release: | |
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108 |
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109 Binary compatibility for all 3.4.x releases was originally planned, |
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110 but this is impossible for the 3.4.1 release due to a bug in the way |
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111 shared libraries were built in Octave 3.4.0. Because of this bug, |
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112 .oct files built for Octave 3.4.0 must be recompiled before they |
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113 will work with Octave 3.4.1. |
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114 |
| 12709 | 115 Given that there would be binary incompatibilities with shared |
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116 libraries going from Octave 3.4.0 to 3.4.1, the following |
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117 incompatible changes were also made in this release: |
| 12709 | 118 |
| 119 * The Perl Compatible Regular Expression (PCRE) library is now | |
| 120 required to build Octave. | |
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121 |
| 12712 | 122 * Octave's libraries and .oct files are now installed in |
| 123 subdirectories of $libdir instead of $libexecdir. | |
| 124 | |
| 12709 | 125 Any future Octave 3.4.x release versions should remain binary |
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126 compatible with Octave 3.4.1 as proper library versioning is now |
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127 being used as recommended by the libtool manual. |
| 12709 | 128 |
| 129 ** The following functions have been deprecated in Octave 3.4.1 and will | |
| 130 be removed from Octave 3.8 (or whatever version is the second major | |
| 131 release after 3.4): | |
| 132 | |
| 133 cquad is_duplicate_entry perror strerror | |
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134 |
| 12709 | 135 ** The following functions are new in 3.4.1: |
| 136 | |
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137 colstyle gmres iscolumn isrow mgorth nproc rectangle |
| 12709 | 138 |
| 139 ** The get_forge_pkg function is now private. | |
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140 |
| 12709 | 141 ** The rectangle_lw, rectangle_sw, triangle_lw, and triangle_sw |
| 142 functions are now private. | |
| 143 | |
| 144 ** The logistic_regression_derivatives and logistic_regression_likelihood | |
| 145 functions are now private. | |
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146 |
| 12739 | 147 ** ChangeLog files in the Octave sources are no longer maintained |
| 148 by hand. Instead, there is a single ChangeLog file generated from | |
| 149 the Mercurial version control commit messages. Older ChangeLog | |
| 150 information can be found in the etc/OLD-ChangeLogs directory in the | |
| 151 source distribution. | |
| 152 | |
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153 Summary of important user-visible changes for version 3.4: |
| 9352 | 154 --------------------------------------------------------- |
| 155 | |
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156 ** BLAS and LAPACK libraries are now required to build Octave. The |
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157 subset of the reference BLAS and LAPACK libraries has been removed |
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158 from the Octave sources. |
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159 |
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160 ** The ARPACK library is now distributed with Octave so it no longer |
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162 Octave. |
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163 |
| 10118 | 164 ** The `lookup' function was extended to be more useful for |
| 165 general-purpose binary searching. Using this improvement, the | |
| 166 ismember function was rewritten for significantly better | |
| 167 performance. | |
| 9352 | 168 |
| 169 ** Real, integer and logical matrices, when used in indexing, will now | |
| 170 cache the internal index_vector value (zero-based indices) when | |
| 171 successfully used as indices, eliminating the conversion penalty for | |
| 10118 | 172 subsequent indexing by the same matrix. In particular, this means it |
| 173 is no longer needed to avoid repeated indexing by logical arrays | |
| 174 using find for performance reasons. | |
| 9888 | 175 |
| 10118 | 176 ** Logical matrices are now treated more efficiently when used as |
| 177 indices. Octave will keep the index as a logical mask unless the | |
| 178 ratio of true elements is small enough, using a specialized | |
| 179 code. Previously, all logical matrices were always first converted | |
| 180 to index vectors. This results in savings in both memory and | |
| 181 computing time. | |
| 9480 | 182 |
| 10118 | 183 ** The `sub2ind' and `ind2sub' functions were reimplemented as compiled |
| 184 functions for better performance. These functions are now faster, | |
| 185 can deliver more economized results for ranges, and can reuse the | |
| 186 index cache mechanism described in previous paragraph. | |
| 187 | |
| 188 ** The built-in function equivalents to associative operators (`plus', | |
| 189 `times', `mtimes', `and', and `or') have been extended to accept | |
| 190 multiple arguments. This is especially useful for summing | |
| 191 (multiplying, etc.) lists of objects (of possibly distinct types): | |
| 9408 | 192 |
| 9449 | 193 matrix_sum = plus (matrix_list{:}); |
| 194 | |
| 10118 | 195 ** An FTP object type based on libcurl has been implemented. These |
| 196 objects allow ftp connections, downloads and uploads to be | |
| 197 managed. For example, | |
| 9880 | 198 |
| 10118 | 199 fp = ftp ("ftp.octave.org); |
| 200 cd (fp, "gnu/octave"); | |
| 201 mget (fp, "octave-3.2.3.tar.bz2"); | |
| 202 close (fp); | |
| 9880 | 203 |
| 10118 | 204 ** The default behavior of `assert (observed, expected)' has been |
| 205 relaxed to employ less strict checking that does not require the | |
| 206 internals of the values to match. This avoids previously valid | |
| 207 tests from breaking due to new internal classes introduced in future | |
| 208 Octave versions. | |
| 9449 | 209 |
| 210 For instance, all of these assertions were true in Octave 3.0.x | |
| 211 but false in 3.2.x due to new optimizations and improvements: | |
| 212 | |
| 213 assert (2*linspace (1, 5, 5), 2*(1:5)) | |
| 214 assert (zeros (0, 0), []) | |
| 215 assert (2*ones (1, 5), (2) (ones (1,5))) | |
| 9462 | 216 |
| 10118 | 217 ** The behavior of library functions `ismatrix', `issquare', and |
| 218 `issymmetric' has been changed for better consistency. | |
| 9873 | 219 |
| 10292 | 220 * The `ismatrix' function now returns true for all numeric, |
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221 logical and character 2-D or N-D matrices. Previously, `ismatrix' |
| 10292 | 222 returned false if the first or second dimension was zero. |
| 223 Hence, `ismatrix ([])' was false, | |
| 224 while `ismatrix (zeros (1,2,0))' was true. | |
| 9873 | 225 |
| 10118 | 226 * The `issquare' function now returns a logical scalar, and is |
| 227 equivalent to the expression | |
| 228 | |
| 229 ismatrix (x) && ndims (x) == 2 && rows (x) == columns (x) | |
| 230 | |
| 231 The dimension is no longer returned. As a result, `issquare ([])' | |
| 232 now yields true. | |
| 9873 | 233 |
| 10118 | 234 * The `issymmetric' function now checks for symmetry instead of |
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235 Hermitianness. For the latter, ishermitian was created. Also, |
| 10118 | 236 logical scalar is returned rather than the dimension, so |
| 237 `issymmetric ([])' is now true. | |
| 9873 | 238 |
| 10118 | 239 ** Function handles are now aware of overloaded functions. If a |
| 240 function is overloaded, the handle determines at the time of its | |
| 241 reference which function to call. A non-overloaded version does not | |
| 242 need to exist. | |
| 9873 | 243 |
| 10118 | 244 ** Overloading functions for built-in classes (double, int8, cell, |
| 245 etc.) is now compatible with Matlab. | |
| 9408 | 246 |
| 10323 | 247 ** Function handles can now be compared with the == and != operators, |
| 248 as well as the `isequal' function. | |
| 249 | |
| 10118 | 250 ** Performance of concatenation (using []) and the functions `cat', |
| 251 `horzcat', and `vertcat' has been improved for multidimensional | |
| 252 arrays. | |
| 10117 | 253 |
| 9547 | 254 ** The operation-assignment operators +=, -=, *= and /= now behave more |
| 10118 | 255 efficiently in certain cases. For instance, if M is a matrix and S a |
| 256 scalar, then the statement | |
| 9547 | 257 |
| 10118 | 258 M += S; |
| 9547 | 259 |
| 10118 | 260 will operate on M's data in-place if it is not shared by another |
| 261 variable, usually increasing both time and memory efficiency. | |
| 9547 | 262 |
| 9558 | 263 Only selected common combinations are affected, namely: |
| 9547 | 264 |
| 265 matrix += matrix | |
| 266 matrix -= matrix | |
| 9558 | 267 matrix .*= matrix |
| 268 matrix ./= matrix | |
| 269 | |
| 9547 | 270 matrix += scalar |
| 271 matrix -= scalar | |
| 272 matrix *= scalar | |
| 273 matrix /= scalar | |
| 9558 | 274 |
| 9552 | 275 logical matrix |= logical matrix |
| 276 logical matrix &= logical matrix | |
| 9547 | 277 |
| 10118 | 278 where matrix and scalar belong to the same class. The left-hand |
| 279 side must be a simple variable reference. | |
| 9888 | 280 |
| 10118 | 281 Moreover, when unary operators occur in expressions, Octave will |
| 282 also try to do the operation in-place if it's argument is a | |
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283 temporary expression. |
| 9589 | 284 |
| 10118 | 285 ** The effect of comparison operators (<, >, <=, and >=) applied to |
| 286 complex numbers has changed to be consistent with the strict | |
| 287 ordering defined by the `max', `min', and `sort' functions. More | |
| 288 specifically, complex numbers are compared by lexicographical | |
| 289 comparison of the pairs `[abs(z), arg(z)]'. Previously, only real | |
| 290 parts were compared; this can be trivially achieved by wrapping the | |
| 291 operands in real(). | |
| 9547 | 292 |
| 10118 | 293 ** The automatic simplification of complex computation results has |
| 294 changed. Octave will now simplify any complex number with a zero | |
| 295 imaginary part or any complex matrix with all elements having zero | |
| 296 imaginary part to a real value. Previously, this was done only for | |
| 297 positive zeros. Note that the behavior of the complex function is | |
| 298 unchanged and it still produces a complex value even if the | |
| 299 imaginary part is zero. | |
| 9826 | 300 |
| 10118 | 301 ** As a side effect of code refactoring in liboctave, the binary |
| 302 logical operations are now more easily amenable to compiler | |
| 303 optimizations and are thus significantly faster. | |
| 9595 | 304 |
| 10118 | 305 ** Octave now allows user-defined `subsasgn' methods to optimize out |
| 306 redundant copies. For more information, see the manual. | |
| 9595 | 307 |
| 10453 | 308 ** More efficient matrix division handling. Octave is now able to |
| 10118 | 309 handle the expressions |
| 9664 | 310 |
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311 M' \ V |
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312 M.' \ V |
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313 V / M |
| 9664 | 314 |
| 10118 | 315 (M is a matrix and V is a vector) more efficiently in certain cases. |
| 316 In particular, if M is triangular, all three expressions will be | |
| 317 handled by a single call to xTRTRS (from LAPACK), with appropriate | |
| 10453 | 318 flags. Previously, all three expressions required a physical |
| 10118 | 319 transpose of M. |
| 9664 | 320 |
| 10118 | 321 ** More efficient handling of certain mixed real-complex matrix |
| 322 operations. For instance, if RM is a real matrix and CM a complex | |
| 323 matrix, | |
| 9664 | 324 |
| 10118 | 325 RM * CM |
| 9664 | 326 |
| 327 can now be evaluated either as | |
| 328 | |
| 329 complex (RM * real (CM), RM * imag (CM)) | |
| 330 | |
| 331 or as | |
| 332 | |
| 333 complex (RM) * CM, | |
| 334 | |
| 10453 | 335 depending on the dimensions. The first form requires more |
| 336 temporaries and copying, but halves the FLOP count, which normally | |
| 337 brings better performance if RM has enough rows. Previously, the | |
| 338 second form was always used. | |
| 9664 | 339 |
| 11111 | 340 Matrix division is similarly affected. |
| 9664 | 341 |
| 10118 | 342 ** More efficient handling of triangular matrix factors returned from |
| 343 factorizations. The functions for computing QR, LU and Cholesky | |
| 344 factorizations will now automatically return the triangular matrix | |
| 345 factors with proper internal matrix_type set, so that it won't need | |
| 346 to be computed when the matrix is used for division. | |
| 9717 | 347 |
| 10118 | 348 ** The built-in `sum' function now handles the non-native summation |
| 349 (i.e., double precision sum of single or integer inputs) more | |
| 350 efficiently, avoiding a temporary conversion of the whole input | |
| 351 array to doubles. Further, `sum' can now accept an extra option | |
| 352 argument, using a compensated summation algorithm rather than a | |
| 353 straightforward sum, which significantly improves precision if lots | |
| 354 of cancellation occurs in the summation. | |
| 9717 | 355 |
| 10118 | 356 ** The built-in `bsxfun' function now uses optimized code for certain |
| 357 cases where built-in operator handles are passed in. Namely, the | |
| 358 optimizations concern the operators `plus', `minus', `times', | |
| 359 `ldivide', `rdivide', `power', `and', `or' (for logical arrays), | |
| 360 the relational operators `eq', `ne', `lt', `le', `gt', `ge', and the | |
| 361 functions `min' and `max'. Optimizations only apply when both | |
| 362 operands are of the same built-in class. Mixed real/complex and | |
| 363 single/double operations will first convert both operands to a | |
| 364 common type. | |
| 9745 | 365 |
| 10118 | 366 ** The `strfind' and `strrep' functions now have compiled |
| 367 implementations, facilitating significantly more efficient searching | |
| 368 and replacing in strings, especially with longer patterns. The code | |
| 369 of `strcat' has been vectorized and is now much more efficient when | |
| 370 many strings are concatenated. The `strcmpi' and `strncmpi' | |
| 371 functions are now built-in functions, providing better performance. | |
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372 |
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373 ** 'str2double' now has a compiled implementation and the API conforms |
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374 to Matlab. The additional Octave-specific features of returning a |
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375 boolean matrix indicating which elements were successfully converted |
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376 has been removed. |
| 10208 | 377 |
| 10453 | 378 ** Matlab-style ignoring input and output function arguments using |
| 11111 | 379 tilde (~) is now supported. Ignored output arguments may be |
| 380 detected from a function using the built-in function `isargout'. | |
| 381 For more details, consult the manual. | |
| 10886 | 382 |
| 10453 | 383 ** The list datatype, deprecated since the introduction of cells, has |
| 384 been removed. | |
| 10276 | 385 |
| 10453 | 386 ** The accumarray function has been optimized and is now significantly |
| 387 faster in certain important cases. | |
| 10054 | 388 |
| 10292 | 389 ** The behavior of isreal and isnumeric functions was changed to be more |
| 390 Matlab-compatible. | |
| 391 | |
| 10406 | 392 ** The integer math & conversion warnings (Octave:int-convert-nan, |
| 393 Octave:int-convert-non-int-val, Octave:int-convert-overflow, | |
| 11111 | 394 Octave:int-math-overflow) have been removed. |
| 10406 | 395 |
| 10453 | 396 ** rem and mod are now built-in functions. They also handle integer |
| 397 types efficiently using integer arithmetic. | |
| 10437 | 398 |
| 10536 | 399 ** Sparse indexing and indexed assignment has been mostly rewritten. |
| 400 Since Octave uses compressed column storage for sparse matrices, | |
| 401 major attention is devoted to operations manipulating whole columns. | |
| 402 Such operations are now significantly faster, as well as some other | |
| 403 important cases. | |
| 404 | |
| 405 Further, it is now possible to pre-allocate a sparse matrix and | |
| 406 subsequently fill it by assignments, provided they meet certain | |
| 407 conditions. For more information, consult the `spalloc' function, | |
| 408 which is no longer a mere dummy. Consequently, nzmax and nnz are no | |
| 11111 | 409 longer always equal in Octave. Octave may also produce a matrix |
| 410 with nnz < nzmax as a result of other operations, so you should | |
| 411 consistently use nnz unless you really want to use nzmax (i.e. the | |
| 412 space allocated for nonzero elements). | |
| 10536 | 413 |
| 414 Sparse concatenation is also affected, and concatenating sparse | |
| 415 matrices, especially larger collections, is now significantly more | |
| 11111 | 416 efficient. This applies to both the [] operator and the |
| 10536 | 417 cat/vertcat/horzcat functions. |
| 418 | |
| 11111 | 419 ** It is now possible to optionally employ the xGESDD LAPACK drivers |
| 420 for computing the singular value decomposition using svd(), instead | |
| 421 of the default xGESVD, using the configuration pseudo-variable | |
| 422 svd_driver. The xGESDD driver can be up to 6x times faster when | |
| 423 singular vectors are requested, but is reported to be somewhat less | |
| 10639 | 424 robust on highly ill-conditioned matrices. |
| 425 | |
| 426 ** Configuration pseudo-variables, such as page_screen_output or | |
| 427 confirm_recursive_rmdir (or the above mentioned svd_driver), now | |
| 428 accept a "local" option as second argument, requesting the change | |
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429 to be undone when the current function returns: |
| 10639 | 430 |
| 431 function [status, msg] = rm_rf (dir) | |
| 432 confirm_recursive_rmdir (false, "local"); | |
| 433 [status, msg] = rmdir (dir, "s"); | |
| 434 ... | |
| 435 endfunction | |
| 436 | |
| 437 Upon return, confirm_recursive_rmdir will be restored to the value | |
| 438 it had on entry to the function, even if there were subsequent | |
| 439 changes to the variable in function rm_rf or any of the functions | |
| 440 it calls. | |
| 441 | |
| 11111 | 442 ** pkg now accepts a -forge option for downloading and installing |
| 443 packages from Octave Forge automatically. For example, | |
| 10774 | 444 |
| 445 pkg install -forge general | |
| 446 | |
| 11111 | 447 will automatically download the latest release of the general |
| 448 package and attempt to install it. No automatic resolving of | |
| 449 dependencies is provided. Further, | |
| 10639 | 450 |
| 10774 | 451 pkg list -forge |
| 452 | |
| 453 can be used to list all available packages. | |
| 454 | |
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455 ** The internal data representation of structs has been completely |
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456 rewritten to make certain optimizations feasible. The field data |
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457 can now be shared between structs with equal keys but different |
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458 dimensions or values, making operations that preserve the fields |
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459 faster. Economized storage is now used for scalar structs (just |
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460 like most other scalars), making their usage more |
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461 memory-efficient. Certain array-like operations on structs |
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462 (concatenation, uniform cellfun, num2cell) have gained a |
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463 significant speed-up. Additionally, the octave_scalar_map class |
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464 now provides a simpler interface to work with scalar structs within |
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465 a C++ DLD function. |
| 10639 | 466 |
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467 ** Two new formats are available for displaying numbers: |
| 11111 | 468 |
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469 format short eng |
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470 format long eng |
| 11111 | 471 |
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472 Both display numbers in engineering notation, i.e., mantissa + |
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473 exponent where the exponent is a multiple of 3. |
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474 |
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475 ** The following functions are new in Octave 3.4: |
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476 accumdim erfcx nfields pqpnonneg uigetdir |
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477 bitpack fileread nth_element quadcc uigetfile |
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478 bitunpack fminbnd onCleanup randi uiputfile |
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479 blkmm fskipl pbaspect repelems uimenu |
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480 cbrt ifelse pie3 reset whitebg |
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481 curl ishermitian powerset rsf2csf |
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482 chop isindex ppder saveas |
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483 daspect luupdate ppint strread |
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484 divergence merge ppjumps textread |
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485 |
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486 ** Using the image function to view images with external programs such |
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487 as display, xv, and xloadimage is no longer supported. The |
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488 image_viewer function has also been removed. |
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489 |
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490 ** The behavior of struct assignments to non-struct values has been |
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491 changed. Previously, it was possible to overwrite an arbitrary |
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492 value: |
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493 |
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494 a = 1; |
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495 a.x = 2; |
| 10873 | 496 |
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497 This is no longer possible unless a is an empty matrix or cell |
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498 array. |
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499 |
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500 ** The dlmread function has been extended to allow specifying a custom |
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501 value for empty fields. |
| 10829 | 502 |
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503 ** The dlmread and dlmwrite functions have been modified to accept |
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504 file IDs (as returned by fopen) in addition to file names. |
| 11111 | 505 |
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506 ** Octave can now optimize away the interpreter overhead of an |
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507 anonymous function handle, if the function simply calls another |
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508 function or handle with some of its parameters bound to certain |
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509 values. Example: |
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510 |
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511 f = @(x) sum (x, 1); |
| 10966 | 512 |
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513 When f is called, the call is forwarded to @sum with the constant 1 |
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514 appended, and the anonymous function call does not occur on the |
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515 call stack. |
| 10829 | 516 |
| 12424 | 517 ** For compatibility with Matlab, mu2lin (x) is now equivalent to |
| 518 mu2lin (x, 0). | |
| 519 | |
| 520 ** The new function `history_control' may be used to control the way | |
| 521 command lines are added to the history list when Octave is using | |
| 522 readline for command-line editing. For example | |
| 523 | |
| 524 history_control ("ignoredups") | |
| 525 | |
| 526 tells Octave to avoid adding duplicate lines to the history list. | |
| 527 | |
| 528 ** Octave now uses the gnulib library for improved portability and to | |
| 529 avoid bugs in operating system functions. | |
| 530 | |
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531 ** Deprecated functions. |
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532 |
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533 The following functions were deprecated in Octave 3.0 and have been |
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534 removed from Octave 3.4. |
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535 |
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536 beta_cdf geometric_pdf pascal_pdf |
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537 beta_inv geometric_rnd pascal_rnd |
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538 beta_pdf hypergeometric_cdf poisson_cdf |
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539 beta_rnd hypergeometric_inv poisson_inv |
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540 binomial_cdf hypergeometric_pdf poisson_pdf |
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541 binomial_inv hypergeometric_rnd poisson_rnd |
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542 binomial_pdf intersection polyinteg |
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543 binomial_rnd is_bool setstr |
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544 chisquare_cdf is_complex struct_contains |
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545 chisquare_inv is_list struct_elements |
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546 chisquare_pdf is_matrix t_cdf |
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547 chisquare_rnd is_scalar t_inv |
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548 clearplot is_square t_pdf |
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549 clg is_stream t_rnd |
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550 com2str is_struct uniform_cdf |
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551 exponential_cdf is_symmetric uniform_inv |
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552 exponential_inv is_vector uniform_pdf |
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553 exponential_pdf isstr uniform_rnd |
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554 exponential_rnd lognormal_cdf weibcdf |
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555 f_cdf lognormal_inv weibinv |
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556 f_inv lognormal_pdf weibpdf |
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557 f_pdf lognormal_rnd weibrnd |
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558 f_rnd meshdom weibull_cdf |
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559 gamma_cdf normal_cdf weibull_inv |
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560 gamma_inv normal_inv weibull_pdf |
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561 gamma_pdf normal_pdf weibull_rnd |
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562 gamma_rnd normal_rnd wiener_rnd |
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563 geometric_cdf pascal_cdf |
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564 geometric_inv pascal_inv |
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565 |
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566 The following functions were deprecated in Octave 3.2 and will |
|
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567 be removed from Octave 3.6 (or whatever version is the second major |
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568 release after 3.2): |
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569 |
|
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570 create_set spcholinv splu |
|
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571 dmult spcumprod spmax |
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572 iscommand spcumsum spmin |
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573 israwcommand spdet spprod |
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574 lchol spdiag spqr |
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575 loadimage spfind spsum |
|
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576 mark_as_command sphcat spsumsq |
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577 mark_as_rawcommand spinv spvcat |
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578 spatan2 spkron str2mat |
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579 spchol splchol unmark_command |
|
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580 spchol2inv split unmark_rawcommand |
|
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581 |
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582 The following functions have been deprecated in Octave 3.4 and will |
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583 be removed from Octave 3.8 (or whatever version is the second major |
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584 release after 3.4): |
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585 |
|
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586 autocor cellidx gammai krylovb saveimage |
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587 autocov dispatch glpkmex perror strerror |
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588 betai fstat is_global replot values |
|
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589 |
|
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590 Summary of important user-visible changes for version 3.2: |
| 5913 | 591 --------------------------------------------------------- |
| 2452 | 592 |
| 8737 | 593 ** Compatibility with Matlab graphics has been improved. |
| 6329 | 594 |
|
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595 The hggroup object and associated listener callback functions have |
| 8737 | 596 been added allowing the inclusion of group objects. Data sources |
|
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597 have been added to these group objects such that |
|
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598 |
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599 x = 0:0.1:10; |
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600 y = sin (x); |
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601 plot (x, y, "ydatasource", "y"); |
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602 for i = 1 : 100 |
|
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603 pause(0.1) |
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604 y = sin (x + 0.1 * i); |
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605 refreshdata(); |
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606 endfor |
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607 |
| 8737 | 608 works as expected. This capability has be used to introduce |
|
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|
609 stem-series, bar-series, etc., objects for better Matlab |
| 8737 | 610 compatibility. |
| 611 | |
| 612 ** New graphics functions: | |
| 613 | |
|
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614 addlistener ezcontour gcbo refresh |
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615 addproperty ezcontourf ginput refreshdata |
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616 allchild ezmesh gtext specular |
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617 available_graphics_toolkits ezmeshc intwarning surfl |
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618 graphics_toolkit ezplot ishghandle trisurf |
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619 cla ezplot3 isocolors waitforbuttonpress |
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620 clabel ezpolar isonormals |
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|
621 comet ezsurf isosurface |
|
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622 dellistener findall linkprop |
|
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|
623 diffuse gcbf plotmatrix |
|
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|
624 |
| 8737 | 625 ** New experimental OpenGL/FLTK based plotting system. |
| 626 | |
| 627 An experimental plotting system based on OpenGL and the FLTK | |
|
11576
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|
628 toolkit is now part of Octave. This graphics toolkit is disabled by |
| 8737 | 629 default. You can switch to using it with the command |
|
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|
630 |
|
11576
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|
631 graphics_toolkit ("fltk") |
|
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|
632 |
|
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|
633 for all future figures or for a particular figure with the command |
|
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|
634 |
|
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|
635 graphics_toolkit (h, "fltk") |
|
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|
636 |
| 11139 | 637 where "h" is a valid figure handle. |
|
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|
638 |
| 8737 | 639 ** Functions providing direct access to gnuplot have been removed. |
| 640 | |
|
7990
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|
641 The functions __gnuplot_plot__, __gnuplot_set__, __gnuplot_raw__, |
|
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|
642 __gnuplot_show__, __gnuplot_replot__, __gnuplot_splot__, |
| 8737 | 643 __gnuplot_save_data__ and __gnuplot_send_inline_data__ have been |
| 644 removed from Octave. These function were incompatible with the | |
| 645 high level graphics handle code. | |
| 6329 | 646 |
| 8885 | 647 ** The Control, Finance and Quaternion functions have been removed. |
| 648 | |
| 649 These functions are now available as separate packages from | |
| 650 | |
| 651 http://octave.sourceforge.net/packages.html | |
| 652 | |
| 653 and can be reinstalled using the Octave package manager (see | |
| 654 the pkg function). | |
| 655 | |
| 656 ** Specific sparse matrix functions removed. | |
| 657 | |
| 658 The following functions, which handled only sparse matrices have | |
| 659 been removed. Instead of calling these functions directly, you | |
| 660 should use the corresponding function without the "sp" prefix. | |
| 8737 | 661 |
| 8885 | 662 spatan2 spcumsum spkron spprod |
| 663 spchol spdet splchol spqr | |
| 664 spchol2inv spdiag splu spsum | |
| 665 spcholinv spfind spmax spsumsqk | |
| 666 spcumprod spinv spmin | |
| 667 | |
| 668 ** Improvements to the debugger. | |
| 669 | |
| 670 The interactive debugging features have been improved. Stopping | |
| 671 on statements with dbstop should work correctly now. Stepping | |
| 672 into and over functions, and stepping one statement at a time | |
| 673 (with dbstep) now works. Moving up and down the call stack with | |
| 674 dbup and dbdown now works. The dbstack function is now available | |
| 675 to print the current function call stack. The new dbquit function | |
| 676 is available to exit the debugging mode. | |
| 677 | |
| 678 ** Improved traceback error messages. | |
| 679 | |
| 680 Traceback error messages are much more concise and easier to | |
| 681 understand. They now display information about the function call | |
| 682 stack instead of the stack of all statements that were active at | |
| 683 the point of the error. | |
|
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|
684 |
| 8737 | 685 ** Object Oriented Programming. |
|
8405
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|
686 |
| 8737 | 687 Octave now includes OOP features and the user can create their own |
| 688 class objects and overloaded functions and operators. For | |
| 689 example, all methods of a class called "myclass" will be found in | |
| 690 a directory "@myclass" on the users path. The class specific | |
| 691 versions of functions and operators take precedence over the | |
| 692 generic versions of these functions. | |
| 693 | |
| 694 New functions related to OOP include | |
| 7189 | 695 |
| 8737 | 696 class inferiorto isobject loadobj methods superiorto |
| 697 | |
| 698 See the Octave manual for more details. | |
| 7038 | 699 |
| 8747 | 700 ** Parsing of Command-style Functions. |
| 701 | |
| 702 Octave now parses command-style functions without needing to first | |
| 703 declare them with "mark_as_command". The rules for recognizing a | |
| 704 command-style function calls are | |
| 705 | |
| 706 * A command must appear as the first word in a statement, | |
| 707 followed by a space. | |
| 708 | |
| 709 * The first character after the space must not be '=' or '(' | |
| 710 | |
| 711 * The next token after the space must not look like a binary | |
| 712 operator. | |
| 713 | |
| 714 These rules should be mostly compatible with the way Matlab parses | |
| 715 command-style function calls and allow users to define commands in | |
| 716 .m files without having to mark them as commands. | |
| 717 | |
| 718 Note that previous versions of Octave allowed expressions like | |
| 719 | |
| 720 x = load -text foo.dat | |
| 721 | |
| 722 but an expression like this will now generate a parse error. In | |
| 723 order to assign the value returned by a function to a variable, | |
| 724 you must use the normal function call syntax: | |
| 725 | |
| 726 x = load ("-text", "foo.dat"); | |
| 727 | |
| 8737 | 728 ** Block comments. |
| 729 | |
| 8747 | 730 Commented code can be between matching "#{" and "#}" or "%{" and |
| 731 "%}" markers, even if the commented code spans several line. This | |
| 732 allows blocks code to be commented, without needing to comment | |
| 733 each line. For example, | |
| 5814 | 734 |
| 8747 | 735 function [s, t] = func (x, y) |
| 736 s = 2 * x; | |
| 737 #{ | |
| 738 s *= y; | |
| 739 t = y + x; | |
| 740 #} | |
|
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diff
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|
741 endfunction |
| 5814 | 742 |
| 8747 | 743 the lines "s *= y;" and "t = y + x" will not be executed. |
| 8737 | 744 |
|
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|
745 ** If any subfunction in a file ends with "end" or "endfunction", then |
|
5252f12537f8
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|
746 they all must end that way. Previously, Octave accepted |
|
5252f12537f8
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|
747 |
|
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|
748 function main () |
|
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|
749 ... |
|
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|
750 # no endfunction here. |
|
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|
751 function sub () |
|
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|
752 ... |
|
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|
753 endfunction |
|
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|
754 |
|
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|
755 but this is no longer allowed. |
|
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|
756 |
| 8737 | 757 ** Special treatment in the parser of expressions like "a' * b". |
| 2452 | 758 |
| 8737 | 759 In these cases the transpose is no longer explicitly formed and |
| 760 BLAS libraries are called with the transpose flagged, | |
| 761 significantly improving performance for these kinds of | |
| 762 operations. | |
|
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|
763 |
| 8737 | 764 ** Single Precision data type. |
| 2452 | 765 |
| 8737 | 766 Octave now includes a single precision data type. Single |
| 767 precision variables can be created with the "single" command, or | |
|
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|
768 from functions like ones, eye, etc. For example, |
| 5995 | 769 |
| 8737 | 770 single (1) |
| 771 ones (2, 2, "single") | |
| 772 zeros (2, 2, "single") | |
| 773 eye (2, 2, "single") | |
| 774 Inf (2, 2, "single") | |
| 775 NaN (2, 2, "single") | |
| 776 NA (2, 2, "single") | |
| 7279 | 777 |
| 8737 | 778 all create single precision variables. For compatibility with |
| 779 Matlab, mixed double/single precision operators and functions | |
| 780 return single precision types. | |
| 781 | |
| 782 As a consequence of this addition to Octave the internal | |
|
7990
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|
783 representation of the double precision NA value has changed, and |
|
86dae6e5b83c
Initial update of NEWS for 3.2 release
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|
784 so users that make use of data generated by Octave with R or |
|
86dae6e5b83c
Initial update of NEWS for 3.2 release
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diff
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|
785 visa-versa are warned that compatibility might not be assured. |
| 7279 | 786 |
| 8737 | 787 ** Improved array indexing. |
| 788 | |
| 789 The underlying code used for indexing of arrays has been | |
|
9034
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|
790 completely rewritten and indexing is now significantly faster. |
| 8737 | 791 |
| 8755 | 792 ** Improved memory management. |
| 793 | |
| 794 Octave will now attempt to share data in some cases where previously | |
| 795 a copy would be made, such as certain array slicing operations or | |
|
9031
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|
796 conversions between cells, structs and cs-lists. This usually reduces |
| 8755 | 797 both time and memory consumption. |
| 9128 | 798 Also, Octave will now attempt to detect and optimize usage of a vector |
| 799 as a stack, when elements are being repeatedly inserted at/removed from | |
| 800 the end of the vector. | |
| 8755 | 801 |
| 8738 | 802 ** Improved performance for reduction operations. |
| 803 | |
| 8755 | 804 The performance of the sum, prod, sumsq, cumsum, cumprod, any, all, |
| 805 max and min functions has been significantly improved. | |
| 8738 | 806 |
| 9006 | 807 ** Sorting and searching. |
| 808 | |
| 809 The performance of sort has been improved, especially when sorting | |
| 10453 | 810 indices are requested. An efficient built-in issorted |
| 811 implementation was added. The sortrows function now uses a more | |
|
12702
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|
812 efficient algorithm, especially in the homogeneous case. The lookup |
| 10453 | 813 function is now a built-in function performing a binary search, |
| 814 optimized for long runs of close elements. Lookup also works with | |
| 815 cell arrays of strings. | |
| 9006 | 816 |
| 817 ** Range arithmetics | |
| 818 | |
| 10453 | 819 For some operations on ranges, Octave will attempt to keep the |
| 820 result as a range. These include negation, adding a scalar, | |
| 821 subtracting a scalar, and multiplying by a scalar. Ranges with zero | |
| 822 increment are allowed and can be constructed using the built-in | |
| 823 function `ones'. | |
| 9006 | 824 |
| 825 ** Various performance improvements. | |
| 826 | |
| 10453 | 827 Performance of a number of other built-in operations and functions |
| 828 was improved, including: | |
| 9006 | 829 |
| 830 * logical operations | |
| 831 * comparison operators | |
| 832 * element-wise power | |
| 833 * accumarray | |
| 834 * cellfun | |
| 835 * isnan | |
| 836 * isinf | |
| 837 * isfinite | |
| 838 * nchoosek | |
| 839 * repmat | |
| 840 * strcmp | |
| 841 | |
| 8737 | 842 ** 64-bit integer arithmetic. |
| 843 | |
| 844 Arithmetic with 64-bit integers (int64 and uint64 types) is fully | |
| 845 supported, with saturation semantics like the other integer types. | |
| 846 Performance of most integer arithmetic operations has been | |
| 847 improved by using integer arithmetic directly. Previously, Octave | |
| 848 performed integer math with saturation semantics by converting the | |
| 849 operands to double precision, performing the operation, and then | |
| 850 converting the result back to an integer value, truncating if | |
| 851 necessary. | |
| 852 | |
| 8885 | 853 ** Diagonal and permutation matrices. |
| 854 | |
| 855 The interpreter can now treat diagonal and permutation matrices as | |
| 856 special objects that store only the non-zero elements, rather than | |
| 857 general full matrices. Therefore, it is now possible to construct | |
| 858 and use these matrices in linear algebra without suffering a | |
| 859 performance penalty due to storing large numbers of zero elements. | |
| 860 | |
| 861 ** Improvements to fsolve. | |
| 862 | |
| 863 The fsolve function now accepts an option structure argument (see | |
| 864 also the optimset function). The INFO values returned from fsolve | |
| 865 have changed to be compatible with Matlab's fsolve function. | |
| 866 Additionally, fsolve is now able to solve overdetermined systems, | |
| 867 complex-differentiable complex systems, systems with a sparse | |
| 868 jacobian and can work in single precision if given single precision | |
|
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|
869 inputs. It can also be called recursively. |
| 8885 | 870 |
| 8737 | 871 ** Improvements to the norm function. |
| 872 | |
| 873 The norm function is now able to compute row or column norms of a | |
| 874 matrix in a single call, as well as general matrix p-norms. | |
| 875 | |
| 876 ** New functions for computing some eigenvalues or singular values. | |
| 877 | |
| 878 The eigs and svds functions have been included in Octave. These | |
| 879 functions require the ARPACK library (now distributed under a | |
| 880 GPL-compatible license). | |
| 881 | |
| 882 ** New QR and Cholesky factorization updating functions. | |
|
8370
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|
883 |
| 8737 | 884 choldelete cholshift qrdelete qrshift |
| 885 cholinsert cholupdate qrinsert qrupdate | |
| 886 | |
| 887 ** New quadrature functions. | |
| 888 | |
| 889 dblquad quadgk quadv triplequad | |
| 890 | |
| 8885 | 891 ** New functions for reading and writing images. |
| 892 | |
| 893 The imwrite and imread functions have been included in Octave. | |
| 894 These functions require the GraphicsMagick library. The new | |
| 895 function imfinfo provides information about an image file (size, | |
| 896 type, colors, etc.) | |
| 897 | |
|
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|
898 ** The input_event_hook function has been replaced by the pair of |
|
1500d0197484
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|
899 functions add_input_event_hook and remove_input_event_hook so that |
|
1500d0197484
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900 more than one hook function may be installed at a time. |
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901 |
| 8737 | 902 ** Other miscellaneous new functions. |
|
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|
903 |
|
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904 addtodate hypot reallog |
|
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|
905 bicgstab idivide realpow |
| 9006 | 906 cellslices info realsqrt |
| 907 cgs interp1q rectint | |
| 908 command_line_path isdebugmode regexptranslate | |
| 909 contrast isfloat restoredefaultpath | |
| 910 convn isstrprop roundb | |
| 911 cummin log1p rundemos | |
| 912 cummax lsqnonneg runlength | |
| 913 datetick matlabroot saveobj | |
| 914 display namelengthmax spaugment | |
| 915 expm1 nargoutchk strchr | |
| 916 filemarker pathdef strvcat | |
| 917 fstat perl subspace | |
| 918 full prctile symvar | |
| 919 fzero quantile treelayout | |
| 920 genvarname re_read_readline_init_file validatestring | |
| 921 histc | |
|
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|
922 |
| 8885 | 923 ** Changes to strcat. |
| 924 | |
| 925 The strcat function is now compatible with Matlab's strcat | |
| 926 function, which removes trailing whitespace when concatenating | |
| 927 character strings. For example | |
| 928 | |
| 929 strcat ('foo ', 'bar') | |
| 930 ==> 'foobar' | |
| 931 | |
| 932 The new function cstrcat provides the previous behavior of | |
| 933 Octave's strcat. | |
| 934 | |
| 935 ** Improvements to the help functions. | |
| 936 | |
|
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|
937 The help system has been mostly re-implemented in .m files to make |
| 8885 | 938 it easier to modify. Performance of the lookfor function has been |
| 939 greatly improved by caching the help text from all functions that | |
| 940 are distributed with Octave. The pkg function has been modified | |
| 941 to generate cache files for external packages when they are | |
| 942 installed. | |
| 943 | |
|
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|
944 ** Deprecated functions. |
|
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|
945 |
|
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|
946 The following functions were deprecated in Octave 3.0 and will be |
|
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947 removed from Octave 3.4 (or whatever version is the second major |
|
8888
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|
948 release after 3.0): |
|
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949 |
|
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|
950 beta_cdf geometric_pdf pascal_pdf |
|
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|
951 beta_inv geometric_rnd pascal_rnd |
|
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|
952 beta_pdf hypergeometric_cdf poisson_cdf |
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|
953 beta_rnd hypergeometric_inv poisson_inv |
|
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954 binomial_cdf hypergeometric_pdf poisson_pdf |
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955 binomial_inv hypergeometric_rnd poisson_rnd |
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956 binomial_pdf intersection polyinteg |
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957 binomial_rnd is_bool setstr |
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958 chisquare_cdf is_complex struct_contains |
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959 chisquare_inv is_list struct_elements |
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960 chisquare_pdf is_matrix t_cdf |
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961 chisquare_rnd is_scalar t_inv |
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962 clearplot is_square t_pdf |
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963 clg is_stream t_rnd |
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964 com2str is_struct uniform_cdf |
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965 exponential_cdf is_symmetric uniform_inv |
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966 exponential_inv is_vector uniform_pdf |
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967 exponential_pdf isstr uniform_rnd |
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968 exponential_rnd lognormal_cdf weibcdf |
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969 f_cdf lognormal_inv weibinv |
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970 f_inv lognormal_pdf weibpdf |
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971 f_pdf lognormal_rnd weibrnd |
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972 f_rnd meshdom weibull_cdf |
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973 gamma_cdf normal_cdf weibull_inv |
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974 gamma_inv normal_inv weibull_pdf |
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975 gamma_pdf normal_pdf weibull_rnd |
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976 gamma_rnd normal_rnd wiener_rnd |
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977 geometric_cdf pascal_cdf |
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978 geometric_inv pascal_inv |
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979 |
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980 The following functions are now deprecated in Octave 3.2 and will |
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981 be removed from Octave 3.6 (or whatever version is the second major |
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982 release after 3.2): |
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983 |
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984 create_set spcholinv spmax |
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985 dmult spcumprod spmin |
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986 iscommand spcumsum spprod |
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987 israwcommand spdet spqr |
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988 lchol spdiag spsum |
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989 loadimage spfind spsumsq |
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990 mark_as_command spinv str2mat |
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991 mark_as_rawcommand spkron unmark_command |
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992 spatan2 splchol unmark_rawcommand |
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993 spchol split |
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994 spchol2inv splu |
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995 |
|
7990
86dae6e5b83c
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996 See NEWS.3 for old news. |