Mercurial > hg > octave-lyh
annotate NEWS @ 12464:dfeea9cae79e
require PCRE to build Octave
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Mon, 21 Feb 2011 03:50:59 -0500 |
| parents | afb65a7bc065 |
| children | bea828c03969 |
| rev | line source |
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1 Summary of important user-visible changes for version 3.6: |
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2 --------------------------------------------------------- |
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3 |
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4 ** Deprecated functions. |
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5 |
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6 The following functions were deprecated in Octave 3.2 and have been |
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7 removed from Octave 3.6. |
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8 |
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9 create_set spcholinv splu |
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10 dmult spcumprod spmax |
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11 iscommand spcumsum spmin |
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12 israwcommand spdet spprod |
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13 lchol spdiag spqr |
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14 loadimage spfind spsum |
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15 mark_as_command sphcat spsumsq |
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16 mark_as_rawcommand spinv spvcat |
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17 spatan2 spkron str2mat |
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18 spchol splchol unmark_command |
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19 spchol2inv split unmark_rawcommand |
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20 |
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21 ** The PCRE library is now required to build Octave. |
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22 |
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23 Summary of important user-visible changes for version 3.4: |
| 9352 | 24 --------------------------------------------------------- |
| 25 | |
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26 ** BLAS and LAPACK libraries are now required to build Octave. The |
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27 subset of the reference BLAS and LAPACK libraries has been removed |
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28 from the Octave sources. |
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29 |
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30 ** The ARPACK library is now distributed with Octave so it no longer |
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31 needs to be available as an external dependency when building |
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32 Octave. |
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33 |
| 10118 | 34 ** The `lookup' function was extended to be more useful for |
| 35 general-purpose binary searching. Using this improvement, the | |
| 36 ismember function was rewritten for significantly better | |
| 37 performance. | |
| 9352 | 38 |
| 39 ** Real, integer and logical matrices, when used in indexing, will now | |
| 40 cache the internal index_vector value (zero-based indices) when | |
| 41 successfully used as indices, eliminating the conversion penalty for | |
| 10118 | 42 subsequent indexing by the same matrix. In particular, this means it |
| 43 is no longer needed to avoid repeated indexing by logical arrays | |
| 44 using find for performance reasons. | |
| 9888 | 45 |
| 10118 | 46 ** Logical matrices are now treated more efficiently when used as |
| 47 indices. Octave will keep the index as a logical mask unless the | |
| 48 ratio of true elements is small enough, using a specialized | |
| 49 code. Previously, all logical matrices were always first converted | |
| 50 to index vectors. This results in savings in both memory and | |
| 51 computing time. | |
| 9480 | 52 |
| 10118 | 53 ** The `sub2ind' and `ind2sub' functions were reimplemented as compiled |
| 54 functions for better performance. These functions are now faster, | |
| 55 can deliver more economized results for ranges, and can reuse the | |
| 56 index cache mechanism described in previous paragraph. | |
| 57 | |
| 58 ** The built-in function equivalents to associative operators (`plus', | |
| 59 `times', `mtimes', `and', and `or') have been extended to accept | |
| 60 multiple arguments. This is especially useful for summing | |
| 61 (multiplying, etc.) lists of objects (of possibly distinct types): | |
| 9408 | 62 |
| 9449 | 63 matrix_sum = plus (matrix_list{:}); |
| 64 | |
| 10118 | 65 ** An FTP object type based on libcurl has been implemented. These |
| 66 objects allow ftp connections, downloads and uploads to be | |
| 67 managed. For example, | |
| 9880 | 68 |
| 10118 | 69 fp = ftp ("ftp.octave.org); |
| 70 cd (fp, "gnu/octave"); | |
| 71 mget (fp, "octave-3.2.3.tar.bz2"); | |
| 72 close (fp); | |
| 9880 | 73 |
| 10118 | 74 ** The default behavior of `assert (observed, expected)' has been |
| 75 relaxed to employ less strict checking that does not require the | |
| 76 internals of the values to match. This avoids previously valid | |
| 77 tests from breaking due to new internal classes introduced in future | |
| 78 Octave versions. | |
| 9449 | 79 |
| 80 For instance, all of these assertions were true in Octave 3.0.x | |
| 81 but false in 3.2.x due to new optimizations and improvements: | |
| 82 | |
| 83 assert (2*linspace (1, 5, 5), 2*(1:5)) | |
| 84 assert (zeros (0, 0), []) | |
| 85 assert (2*ones (1, 5), (2) (ones (1,5))) | |
| 9462 | 86 |
| 10118 | 87 ** The behavior of library functions `ismatrix', `issquare', and |
| 88 `issymmetric' has been changed for better consistency. | |
| 9873 | 89 |
| 10292 | 90 * The `ismatrix' function now returns true for all numeric, |
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91 logical and character 2-D or N-D matrices. Previously, `ismatrix' |
| 10292 | 92 returned false if the first or second dimension was zero. |
| 93 Hence, `ismatrix ([])' was false, | |
| 94 while `ismatrix (zeros (1,2,0))' was true. | |
| 9873 | 95 |
| 10118 | 96 * The `issquare' function now returns a logical scalar, and is |
| 97 equivalent to the expression | |
| 98 | |
| 99 ismatrix (x) && ndims (x) == 2 && rows (x) == columns (x) | |
| 100 | |
| 101 The dimension is no longer returned. As a result, `issquare ([])' | |
| 102 now yields true. | |
| 9873 | 103 |
| 10118 | 104 * The `issymmetric' function now checks for symmetry instead of |
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105 Hermitianness. For the latter, ishermitian was created. Also, |
| 10118 | 106 logical scalar is returned rather than the dimension, so |
| 107 `issymmetric ([])' is now true. | |
| 9873 | 108 |
| 10118 | 109 ** Function handles are now aware of overloaded functions. If a |
| 110 function is overloaded, the handle determines at the time of its | |
| 111 reference which function to call. A non-overloaded version does not | |
| 112 need to exist. | |
| 9873 | 113 |
| 10118 | 114 ** Overloading functions for built-in classes (double, int8, cell, |
| 115 etc.) is now compatible with Matlab. | |
| 9408 | 116 |
| 10323 | 117 ** Function handles can now be compared with the == and != operators, |
| 118 as well as the `isequal' function. | |
| 119 | |
| 10118 | 120 ** Performance of concatenation (using []) and the functions `cat', |
| 121 `horzcat', and `vertcat' has been improved for multidimensional | |
| 122 arrays. | |
| 10117 | 123 |
| 9547 | 124 ** The operation-assignment operators +=, -=, *= and /= now behave more |
| 10118 | 125 efficiently in certain cases. For instance, if M is a matrix and S a |
| 126 scalar, then the statement | |
| 9547 | 127 |
| 10118 | 128 M += S; |
| 9547 | 129 |
| 10118 | 130 will operate on M's data in-place if it is not shared by another |
| 131 variable, usually increasing both time and memory efficiency. | |
| 9547 | 132 |
| 9558 | 133 Only selected common combinations are affected, namely: |
| 9547 | 134 |
| 135 matrix += matrix | |
| 136 matrix -= matrix | |
| 9558 | 137 matrix .*= matrix |
| 138 matrix ./= matrix | |
| 139 | |
| 9547 | 140 matrix += scalar |
| 141 matrix -= scalar | |
| 142 matrix *= scalar | |
| 143 matrix /= scalar | |
| 9558 | 144 |
| 9552 | 145 logical matrix |= logical matrix |
| 146 logical matrix &= logical matrix | |
| 9547 | 147 |
| 10118 | 148 where matrix and scalar belong to the same class. The left-hand |
| 149 side must be a simple variable reference. | |
| 9888 | 150 |
| 10118 | 151 Moreover, when unary operators occur in expressions, Octave will |
| 152 also try to do the operation in-place if it's argument is a | |
| 153 temporary expresssion. | |
| 9589 | 154 |
| 10118 | 155 ** The effect of comparison operators (<, >, <=, and >=) applied to |
| 156 complex numbers has changed to be consistent with the strict | |
| 157 ordering defined by the `max', `min', and `sort' functions. More | |
| 158 specifically, complex numbers are compared by lexicographical | |
| 159 comparison of the pairs `[abs(z), arg(z)]'. Previously, only real | |
| 160 parts were compared; this can be trivially achieved by wrapping the | |
| 161 operands in real(). | |
| 9547 | 162 |
| 10118 | 163 ** The automatic simplification of complex computation results has |
| 164 changed. Octave will now simplify any complex number with a zero | |
| 165 imaginary part or any complex matrix with all elements having zero | |
| 166 imaginary part to a real value. Previously, this was done only for | |
| 167 positive zeros. Note that the behavior of the complex function is | |
| 168 unchanged and it still produces a complex value even if the | |
| 169 imaginary part is zero. | |
| 9826 | 170 |
| 10118 | 171 ** As a side effect of code refactoring in liboctave, the binary |
| 172 logical operations are now more easily amenable to compiler | |
| 173 optimizations and are thus significantly faster. | |
| 9595 | 174 |
| 10118 | 175 ** Octave now allows user-defined `subsasgn' methods to optimize out |
| 176 redundant copies. For more information, see the manual. | |
| 9595 | 177 |
| 10453 | 178 ** More efficient matrix division handling. Octave is now able to |
| 10118 | 179 handle the expressions |
| 9664 | 180 |
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181 M' \ V |
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182 M.' \ V |
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183 V / M |
| 9664 | 184 |
| 10118 | 185 (M is a matrix and V is a vector) more efficiently in certain cases. |
| 186 In particular, if M is triangular, all three expressions will be | |
| 187 handled by a single call to xTRTRS (from LAPACK), with appropriate | |
| 10453 | 188 flags. Previously, all three expressions required a physical |
| 10118 | 189 transpose of M. |
| 9664 | 190 |
| 10118 | 191 ** More efficient handling of certain mixed real-complex matrix |
| 192 operations. For instance, if RM is a real matrix and CM a complex | |
| 193 matrix, | |
| 9664 | 194 |
| 10118 | 195 RM * CM |
| 9664 | 196 |
| 197 can now be evaluated either as | |
| 198 | |
| 199 complex (RM * real (CM), RM * imag (CM)) | |
| 200 | |
| 201 or as | |
| 202 | |
| 203 complex (RM) * CM, | |
| 204 | |
| 10453 | 205 depending on the dimensions. The first form requires more |
| 206 temporaries and copying, but halves the FLOP count, which normally | |
| 207 brings better performance if RM has enough rows. Previously, the | |
| 208 second form was always used. | |
| 9664 | 209 |
| 11111 | 210 Matrix division is similarly affected. |
| 9664 | 211 |
| 10118 | 212 ** More efficient handling of triangular matrix factors returned from |
| 213 factorizations. The functions for computing QR, LU and Cholesky | |
| 214 factorizations will now automatically return the triangular matrix | |
| 215 factors with proper internal matrix_type set, so that it won't need | |
| 216 to be computed when the matrix is used for division. | |
| 9717 | 217 |
| 10118 | 218 ** The built-in `sum' function now handles the non-native summation |
| 219 (i.e., double precision sum of single or integer inputs) more | |
| 220 efficiently, avoiding a temporary conversion of the whole input | |
| 221 array to doubles. Further, `sum' can now accept an extra option | |
| 222 argument, using a compensated summation algorithm rather than a | |
| 223 straightforward sum, which significantly improves precision if lots | |
| 224 of cancellation occurs in the summation. | |
| 9717 | 225 |
| 10118 | 226 ** The built-in `bsxfun' function now uses optimized code for certain |
| 227 cases where built-in operator handles are passed in. Namely, the | |
| 228 optimizations concern the operators `plus', `minus', `times', | |
| 229 `ldivide', `rdivide', `power', `and', `or' (for logical arrays), | |
| 230 the relational operators `eq', `ne', `lt', `le', `gt', `ge', and the | |
| 231 functions `min' and `max'. Optimizations only apply when both | |
| 232 operands are of the same built-in class. Mixed real/complex and | |
| 233 single/double operations will first convert both operands to a | |
| 234 common type. | |
| 9745 | 235 |
| 10118 | 236 ** The `strfind' and `strrep' functions now have compiled |
| 237 implementations, facilitating significantly more efficient searching | |
| 238 and replacing in strings, especially with longer patterns. The code | |
| 239 of `strcat' has been vectorized and is now much more efficient when | |
| 240 many strings are concatenated. The `strcmpi' and `strncmpi' | |
| 241 functions are now built-in functions, providing better performance. | |
| 10208 | 242 |
| 10453 | 243 ** Matlab-style ignoring input and output function arguments using |
| 11111 | 244 tilde (~) is now supported. Ignored output arguments may be |
| 245 detected from a function using the built-in function `isargout'. | |
| 246 For more details, consult the manual. | |
| 10886 | 247 |
| 10453 | 248 ** The list datatype, deprecated since the introduction of cells, has |
| 249 been removed. | |
| 10276 | 250 |
| 10453 | 251 ** The accumarray function has been optimized and is now significantly |
| 252 faster in certain important cases. | |
| 10054 | 253 |
| 10292 | 254 ** The behavior of isreal and isnumeric functions was changed to be more |
| 255 Matlab-compatible. | |
| 256 | |
| 10406 | 257 ** The integer math & conversion warnings (Octave:int-convert-nan, |
| 258 Octave:int-convert-non-int-val, Octave:int-convert-overflow, | |
| 11111 | 259 Octave:int-math-overflow) have been removed. |
| 10406 | 260 |
| 10453 | 261 ** rem and mod are now built-in functions. They also handle integer |
| 262 types efficiently using integer arithmetic. | |
| 10437 | 263 |
| 10536 | 264 ** Sparse indexing and indexed assignment has been mostly rewritten. |
| 265 Since Octave uses compressed column storage for sparse matrices, | |
| 266 major attention is devoted to operations manipulating whole columns. | |
| 267 Such operations are now significantly faster, as well as some other | |
| 268 important cases. | |
| 269 | |
| 270 Further, it is now possible to pre-allocate a sparse matrix and | |
| 271 subsequently fill it by assignments, provided they meet certain | |
| 272 conditions. For more information, consult the `spalloc' function, | |
| 273 which is no longer a mere dummy. Consequently, nzmax and nnz are no | |
| 11111 | 274 longer always equal in Octave. Octave may also produce a matrix |
| 275 with nnz < nzmax as a result of other operations, so you should | |
| 276 consistently use nnz unless you really want to use nzmax (i.e. the | |
| 277 space allocated for nonzero elements). | |
| 10536 | 278 |
| 279 Sparse concatenation is also affected, and concatenating sparse | |
| 280 matrices, especially larger collections, is now significantly more | |
| 11111 | 281 efficient. This applies to both the [] operator and the |
| 10536 | 282 cat/vertcat/horzcat functions. |
| 283 | |
| 11111 | 284 ** It is now possible to optionally employ the xGESDD LAPACK drivers |
| 285 for computing the singular value decomposition using svd(), instead | |
| 286 of the default xGESVD, using the configuration pseudo-variable | |
| 287 svd_driver. The xGESDD driver can be up to 6x times faster when | |
| 288 singular vectors are requested, but is reported to be somewhat less | |
| 10639 | 289 robust on highly ill-conditioned matrices. |
| 290 | |
| 291 ** Configuration pseudo-variables, such as page_screen_output or | |
| 292 confirm_recursive_rmdir (or the above mentioned svd_driver), now | |
| 293 accept a "local" option as second argument, requesting the change | |
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294 to be undone when the current function returns: |
| 10639 | 295 |
| 296 function [status, msg] = rm_rf (dir) | |
| 297 confirm_recursive_rmdir (false, "local"); | |
| 298 [status, msg] = rmdir (dir, "s"); | |
| 299 ... | |
| 300 endfunction | |
| 301 | |
| 302 Upon return, confirm_recursive_rmdir will be restored to the value | |
| 303 it had on entry to the function, even if there were subsequent | |
| 304 changes to the variable in function rm_rf or any of the functions | |
| 305 it calls. | |
| 306 | |
| 11111 | 307 ** pkg now accepts a -forge option for downloading and installing |
| 308 packages from Octave Forge automatically. For example, | |
| 10774 | 309 |
| 310 pkg install -forge general | |
| 311 | |
| 11111 | 312 will automatically download the latest release of the general |
| 313 package and attempt to install it. No automatic resolving of | |
| 314 dependencies is provided. Further, | |
| 10639 | 315 |
| 10774 | 316 pkg list -forge |
| 317 | |
| 318 can be used to list all available packages. | |
| 319 | |
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320 ** The internal data representation of structs has been completely |
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321 rewritten to make certain optimizations feasible. The field data |
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322 can now be shared between structs with equal keys but different |
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323 dimensions or values, making operations that preserve the fields |
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324 faster. Economized storage is now used for scalar structs (just |
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325 like most other scalars), making their usage more |
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326 memory-efficient. Certain array-like operations on structs |
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327 (concatenation, uniform cellfun, num2cell) have gained a |
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328 significant speed-up. Additionally, the octave_scalar_map class |
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329 now provides a simpler interface to work with scalar structs within |
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330 a C++ DLD function. |
| 10639 | 331 |
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332 ** Two new formats are available for displaying numbers: |
| 11111 | 333 |
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334 format short eng |
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335 format long eng |
| 11111 | 336 |
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337 Both display numbers in engineering notation, i.e., mantissa + |
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338 exponent where the exponent is a multiple of 3. |
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339 |
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340 ** The following functions are new in Octave 3.4: |
| 10829 | 341 |
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342 accumdim erfcx nfields pqpnonneg uigetdir |
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343 bitpack fileread nth_element quadcc uigetfile |
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344 bitunpack fminbnd onCleanup randi uiputfile |
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345 blkmm fskipl pbaspect repelems uimenu |
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346 cbrt ifelse pie3 reset whitebg |
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347 curl ishermitian powerset rsf2csf |
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348 chop isindex ppder saveas |
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349 daspect luupdate ppint strread |
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350 divergence merge ppjumps textread |
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351 |
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352 ** Using the image function to view images with external programs such |
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353 as display, xv, and xloadimage is no longer supported. The |
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354 image_viewer function has also been removed. |
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355 |
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356 ** The behavior of struct assignments to non-struct values has been |
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357 changed. Previously, it was possible to overwrite an arbitrary |
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358 value: |
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359 |
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360 a = 1; |
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361 a.x = 2; |
| 10873 | 362 |
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363 This is no longer possible unless a is an empty matrix or cell |
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364 array. |
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365 |
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366 ** The dlmread function has been extended to allow specifying a custom |
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367 value for empty fields. |
| 10829 | 368 |
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369 ** The dlmread and dlmwrite functions have been modified to accept |
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370 file IDs (as returned by fopen) in addition to file names. |
| 11111 | 371 |
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372 ** Octave can now optimize away the interpreter overhead of an |
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373 anonymous function handle, if the function simply calls another |
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374 function or handle with some of its parameters bound to certain |
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375 values. Example: |
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376 |
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377 f = @(x) sum (x, 1); |
| 10966 | 378 |
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379 When f is called, the call is forwarded to @sum with the constant 1 |
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380 appended, and the anonymous function call does not occur on the |
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381 call stack. |
| 10829 | 382 |
| 12424 | 383 ** For compatibility with Matlab, mu2lin (x) is now equivalent to |
| 384 mu2lin (x, 0). | |
| 385 | |
| 386 ** The new function `history_control' may be used to control the way | |
| 387 command lines are added to the history list when Octave is using | |
| 388 readline for command-line editing. For example | |
| 389 | |
| 390 history_control ("ignoredups") | |
| 391 | |
| 392 tells Octave to avoid adding duplicate lines to the history list. | |
| 393 | |
| 394 ** Octave now uses the gnulib library for improved portability and to | |
| 395 avoid bugs in operating system functions. | |
| 396 | |
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397 ** Deprecated functions. |
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398 |
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399 The following functions were deprecated in Octave 3.0 and have been |
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400 removed from Octave 3.4. |
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401 |
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402 beta_cdf geometric_pdf pascal_pdf |
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403 beta_inv geometric_rnd pascal_rnd |
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404 beta_pdf hypergeometric_cdf poisson_cdf |
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405 beta_rnd hypergeometric_inv poisson_inv |
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406 binomial_cdf hypergeometric_pdf poisson_pdf |
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407 binomial_inv hypergeometric_rnd poisson_rnd |
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408 binomial_pdf intersection polyinteg |
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409 binomial_rnd is_bool setstr |
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410 chisquare_cdf is_complex struct_contains |
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411 chisquare_inv is_list struct_elements |
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412 chisquare_pdf is_matrix t_cdf |
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413 chisquare_rnd is_scalar t_inv |
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414 clearplot is_square t_pdf |
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415 clg is_stream t_rnd |
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416 com2str is_struct uniform_cdf |
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417 exponential_cdf is_symmetric uniform_inv |
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418 exponential_inv is_vector uniform_pdf |
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419 exponential_pdf isstr uniform_rnd |
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420 exponential_rnd lognormal_cdf weibcdf |
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421 f_cdf lognormal_inv weibinv |
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422 f_inv lognormal_pdf weibpdf |
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423 f_pdf lognormal_rnd weibrnd |
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424 f_rnd meshdom weibull_cdf |
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425 gamma_cdf normal_cdf weibull_inv |
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426 gamma_inv normal_inv weibull_pdf |
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427 gamma_pdf normal_pdf weibull_rnd |
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428 gamma_rnd normal_rnd wiener_rnd |
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429 geometric_cdf pascal_cdf |
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430 geometric_inv pascal_inv |
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431 |
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432 The following functions were deprecated in Octave 3.2 and will |
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433 be removed from Octave 3.6 (or whatever version is the second major |
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434 release after 3.2): |
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435 |
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436 create_set spcholinv splu |
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437 dmult spcumprod spmax |
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438 iscommand spcumsum spmin |
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439 israwcommand spdet spprod |
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440 lchol spdiag spqr |
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441 loadimage spfind spsum |
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442 mark_as_command sphcat spsumsq |
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443 mark_as_rawcommand spinv spvcat |
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444 spatan2 spkron str2mat |
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445 spchol splchol unmark_command |
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446 spchol2inv split unmark_rawcommand |
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447 |
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448 The following functions have been deprecated in Octave 3.4 and will |
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449 be removed from Octave 3.8 (or whatever version is the second major |
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450 release after 3.4): |
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451 |
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452 autocor cellidx gammai krylovb values |
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453 autocov dispatch glpkmex replot |
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454 betai fstat is_global saveimage |
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455 |
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456 Summary of important user-visible changes for version 3.2: |
| 5913 | 457 --------------------------------------------------------- |
| 2452 | 458 |
| 8737 | 459 ** Compatibility with Matlab graphics has been improved. |
| 6329 | 460 |
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461 The hggroup object and associated listener callback functions have |
| 8737 | 462 been added allowing the inclusion of group objects. Data sources |
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463 have been added to these group objects such that |
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464 |
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465 x = 0:0.1:10; |
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466 y = sin (x); |
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467 plot (x, y, "ydatasource", "y"); |
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468 for i = 1 : 100 |
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469 pause(0.1) |
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470 y = sin (x + 0.1 * i); |
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471 refreshdata(); |
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472 endfor |
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473 |
| 8737 | 474 works as expected. This capability has be used to introduce |
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475 stem-series, bar-series, etc., objects for better Matlab |
| 8737 | 476 compatibility. |
| 477 | |
| 478 ** New graphics functions: | |
| 479 | |
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480 addlistener ezcontour gcbo refresh |
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481 addproperty ezcontourf ginput refreshdata |
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482 allchild ezmesh gtext specular |
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483 available_graphics_toolkits ezmeshc intwarning surfl |
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484 graphics_toolkit ezplot ishghandle trisurf |
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485 cla ezplot3 isocolors waitforbuttonpress |
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486 clabel ezpolar isonormals |
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487 comet ezsurf isosurface |
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488 dellistener findall linkprop |
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489 diffuse gcbf plotmatrix |
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490 |
| 8737 | 491 ** New experimental OpenGL/FLTK based plotting system. |
| 492 | |
| 493 An experimental plotting system based on OpenGL and the FLTK | |
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494 toolkit is now part of Octave. This graphics toolkit is disabled by |
| 8737 | 495 default. You can switch to using it with the command |
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496 |
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497 graphics_toolkit ("fltk") |
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498 |
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499 for all future figures or for a particular figure with the command |
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500 |
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501 graphics_toolkit (h, "fltk") |
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502 |
| 11139 | 503 where "h" is a valid figure handle. |
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504 |
| 8737 | 505 ** Functions providing direct access to gnuplot have been removed. |
| 506 | |
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507 The functions __gnuplot_plot__, __gnuplot_set__, __gnuplot_raw__, |
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508 __gnuplot_show__, __gnuplot_replot__, __gnuplot_splot__, |
| 8737 | 509 __gnuplot_save_data__ and __gnuplot_send_inline_data__ have been |
| 510 removed from Octave. These function were incompatible with the | |
| 511 high level graphics handle code. | |
| 6329 | 512 |
| 8885 | 513 ** The Control, Finance and Quaternion functions have been removed. |
| 514 | |
| 515 These functions are now available as separate packages from | |
| 516 | |
| 517 http://octave.sourceforge.net/packages.html | |
| 518 | |
| 519 and can be reinstalled using the Octave package manager (see | |
| 520 the pkg function). | |
| 521 | |
| 522 ** Specific sparse matrix functions removed. | |
| 523 | |
| 524 The following functions, which handled only sparse matrices have | |
| 525 been removed. Instead of calling these functions directly, you | |
| 526 should use the corresponding function without the "sp" prefix. | |
| 8737 | 527 |
| 8885 | 528 spatan2 spcumsum spkron spprod |
| 529 spchol spdet splchol spqr | |
| 530 spchol2inv spdiag splu spsum | |
| 531 spcholinv spfind spmax spsumsqk | |
| 532 spcumprod spinv spmin | |
| 533 | |
| 534 ** Improvements to the debugger. | |
| 535 | |
| 536 The interactive debugging features have been improved. Stopping | |
| 537 on statements with dbstop should work correctly now. Stepping | |
| 538 into and over functions, and stepping one statement at a time | |
| 539 (with dbstep) now works. Moving up and down the call stack with | |
| 540 dbup and dbdown now works. The dbstack function is now available | |
| 541 to print the current function call stack. The new dbquit function | |
| 542 is available to exit the debugging mode. | |
| 543 | |
| 544 ** Improved traceback error messages. | |
| 545 | |
| 546 Traceback error messages are much more concise and easier to | |
| 547 understand. They now display information about the function call | |
| 548 stack instead of the stack of all statements that were active at | |
| 549 the point of the error. | |
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550 |
| 8737 | 551 ** Object Oriented Programming. |
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552 |
| 8737 | 553 Octave now includes OOP features and the user can create their own |
| 554 class objects and overloaded functions and operators. For | |
| 555 example, all methods of a class called "myclass" will be found in | |
| 556 a directory "@myclass" on the users path. The class specific | |
| 557 versions of functions and operators take precedence over the | |
| 558 generic versions of these functions. | |
| 559 | |
| 560 New functions related to OOP include | |
| 7189 | 561 |
| 8737 | 562 class inferiorto isobject loadobj methods superiorto |
| 563 | |
| 564 See the Octave manual for more details. | |
| 7038 | 565 |
| 8747 | 566 ** Parsing of Command-style Functions. |
| 567 | |
| 568 Octave now parses command-style functions without needing to first | |
| 569 declare them with "mark_as_command". The rules for recognizing a | |
| 570 command-style function calls are | |
| 571 | |
| 572 * A command must appear as the first word in a statement, | |
| 573 followed by a space. | |
| 574 | |
| 575 * The first character after the space must not be '=' or '(' | |
| 576 | |
| 577 * The next token after the space must not look like a binary | |
| 578 operator. | |
| 579 | |
| 580 These rules should be mostly compatible with the way Matlab parses | |
| 581 command-style function calls and allow users to define commands in | |
| 582 .m files without having to mark them as commands. | |
| 583 | |
| 584 Note that previous versions of Octave allowed expressions like | |
| 585 | |
| 586 x = load -text foo.dat | |
| 587 | |
| 588 but an expression like this will now generate a parse error. In | |
| 589 order to assign the value returned by a function to a variable, | |
| 590 you must use the normal function call syntax: | |
| 591 | |
| 592 x = load ("-text", "foo.dat"); | |
| 593 | |
| 8737 | 594 ** Block comments. |
| 595 | |
| 8747 | 596 Commented code can be between matching "#{" and "#}" or "%{" and |
| 597 "%}" markers, even if the commented code spans several line. This | |
| 598 allows blocks code to be commented, without needing to comment | |
| 599 each line. For example, | |
| 5814 | 600 |
| 8747 | 601 function [s, t] = func (x, y) |
| 602 s = 2 * x; | |
| 603 #{ | |
| 604 s *= y; | |
| 605 t = y + x; | |
| 606 #} | |
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607 endfunction |
| 5814 | 608 |
| 8747 | 609 the lines "s *= y;" and "t = y + x" will not be executed. |
| 8737 | 610 |
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611 ** If any subfunction in a file ends with "end" or "endfunction", then |
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612 they all must end that way. Previously, Octave accepted |
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613 |
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614 function main () |
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615 ... |
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616 # no endfunction here. |
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617 function sub () |
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618 ... |
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619 endfunction |
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620 |
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621 but this is no longer allowed. |
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622 |
| 8737 | 623 ** Special treatment in the parser of expressions like "a' * b". |
| 2452 | 624 |
| 8737 | 625 In these cases the transpose is no longer explicitly formed and |
| 626 BLAS libraries are called with the transpose flagged, | |
| 627 significantly improving performance for these kinds of | |
| 628 operations. | |
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629 |
| 8737 | 630 ** Single Precision data type. |
| 2452 | 631 |
| 8737 | 632 Octave now includes a single precision data type. Single |
| 633 precision variables can be created with the "single" command, or | |
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634 from functions like ones, eye, etc. For example, |
| 5995 | 635 |
| 8737 | 636 single (1) |
| 637 ones (2, 2, "single") | |
| 638 zeros (2, 2, "single") | |
| 639 eye (2, 2, "single") | |
| 640 Inf (2, 2, "single") | |
| 641 NaN (2, 2, "single") | |
| 642 NA (2, 2, "single") | |
| 7279 | 643 |
| 8737 | 644 all create single precision variables. For compatibility with |
| 645 Matlab, mixed double/single precision operators and functions | |
| 646 return single precision types. | |
| 647 | |
| 648 As a consequence of this addition to Octave the internal | |
|
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649 representation of the double precision NA value has changed, and |
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650 so users that make use of data generated by Octave with R or |
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651 visa-versa are warned that compatibility might not be assured. |
| 7279 | 652 |
| 8737 | 653 ** Improved array indexing. |
| 654 | |
| 655 The underlying code used for indexing of arrays has been | |
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656 completely rewritten and indexing is now significantly faster. |
| 8737 | 657 |
| 8755 | 658 ** Improved memory management. |
| 659 | |
| 660 Octave will now attempt to share data in some cases where previously | |
| 661 a copy would be made, such as certain array slicing operations or | |
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662 conversions between cells, structs and cs-lists. This usually reduces |
| 8755 | 663 both time and memory consumption. |
| 9128 | 664 Also, Octave will now attempt to detect and optimize usage of a vector |
| 665 as a stack, when elements are being repeatedly inserted at/removed from | |
| 666 the end of the vector. | |
| 8755 | 667 |
| 8738 | 668 ** Improved performance for reduction operations. |
| 669 | |
| 8755 | 670 The performance of the sum, prod, sumsq, cumsum, cumprod, any, all, |
| 671 max and min functions has been significantly improved. | |
| 8738 | 672 |
| 9006 | 673 ** Sorting and searching. |
| 674 | |
| 675 The performance of sort has been improved, especially when sorting | |
| 10453 | 676 indices are requested. An efficient built-in issorted |
| 677 implementation was added. The sortrows function now uses a more | |
| 678 efficient algorithm, especially in the homegeneous case. The lookup | |
| 679 function is now a built-in function performing a binary search, | |
| 680 optimized for long runs of close elements. Lookup also works with | |
| 681 cell arrays of strings. | |
| 9006 | 682 |
| 683 ** Range arithmetics | |
| 684 | |
| 10453 | 685 For some operations on ranges, Octave will attempt to keep the |
| 686 result as a range. These include negation, adding a scalar, | |
| 687 subtracting a scalar, and multiplying by a scalar. Ranges with zero | |
| 688 increment are allowed and can be constructed using the built-in | |
| 689 function `ones'. | |
| 9006 | 690 |
| 691 ** Various performance improvements. | |
| 692 | |
| 10453 | 693 Performance of a number of other built-in operations and functions |
| 694 was improved, including: | |
| 9006 | 695 |
| 696 * logical operations | |
| 697 * comparison operators | |
| 698 * element-wise power | |
| 699 * accumarray | |
| 700 * cellfun | |
| 701 * isnan | |
| 702 * isinf | |
| 703 * isfinite | |
| 704 * nchoosek | |
| 705 * repmat | |
| 706 * strcmp | |
| 707 | |
| 8737 | 708 ** 64-bit integer arithmetic. |
| 709 | |
| 710 Arithmetic with 64-bit integers (int64 and uint64 types) is fully | |
| 711 supported, with saturation semantics like the other integer types. | |
| 712 Performance of most integer arithmetic operations has been | |
| 713 improved by using integer arithmetic directly. Previously, Octave | |
| 714 performed integer math with saturation semantics by converting the | |
| 715 operands to double precision, performing the operation, and then | |
| 716 converting the result back to an integer value, truncating if | |
| 717 necessary. | |
| 718 | |
| 8885 | 719 ** Diagonal and permutation matrices. |
| 720 | |
| 721 The interpreter can now treat diagonal and permutation matrices as | |
| 722 special objects that store only the non-zero elements, rather than | |
| 723 general full matrices. Therefore, it is now possible to construct | |
| 724 and use these matrices in linear algebra without suffering a | |
| 725 performance penalty due to storing large numbers of zero elements. | |
| 726 | |
| 727 ** Improvements to fsolve. | |
| 728 | |
| 729 The fsolve function now accepts an option structure argument (see | |
| 730 also the optimset function). The INFO values returned from fsolve | |
| 731 have changed to be compatible with Matlab's fsolve function. | |
| 732 Additionally, fsolve is now able to solve overdetermined systems, | |
| 733 complex-differentiable complex systems, systems with a sparse | |
| 734 jacobian and can work in single precision if given single precision | |
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735 inputs. It can also be called recursively. |
| 8885 | 736 |
| 8737 | 737 ** Improvements to the norm function. |
| 738 | |
| 739 The norm function is now able to compute row or column norms of a | |
| 740 matrix in a single call, as well as general matrix p-norms. | |
| 741 | |
| 742 ** New functions for computing some eigenvalues or singular values. | |
| 743 | |
| 744 The eigs and svds functions have been included in Octave. These | |
| 745 functions require the ARPACK library (now distributed under a | |
| 746 GPL-compatible license). | |
| 747 | |
| 748 ** New QR and Cholesky factorization updating functions. | |
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749 |
| 8737 | 750 choldelete cholshift qrdelete qrshift |
| 751 cholinsert cholupdate qrinsert qrupdate | |
| 752 | |
| 753 ** New quadrature functions. | |
| 754 | |
| 755 dblquad quadgk quadv triplequad | |
| 756 | |
| 8885 | 757 ** New functions for reading and writing images. |
| 758 | |
| 759 The imwrite and imread functions have been included in Octave. | |
| 760 These functions require the GraphicsMagick library. The new | |
| 761 function imfinfo provides information about an image file (size, | |
| 762 type, colors, etc.) | |
| 763 | |
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764 ** The input_event_hook function has been replaced by the pair of |
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765 functions add_input_event_hook and remove_input_event_hook so that |
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766 more than one hook function may be installed at a time. |
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767 |
| 8737 | 768 ** Other miscellaneous new functions. |
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769 |
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770 addtodate hypot reallog |
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771 bicgstab idivide realpow |
| 9006 | 772 cellslices info realsqrt |
| 773 cgs interp1q rectint | |
| 774 command_line_path isdebugmode regexptranslate | |
| 775 contrast isfloat restoredefaultpath | |
| 776 convn isstrprop roundb | |
| 777 cummin log1p rundemos | |
| 778 cummax lsqnonneg runlength | |
| 779 datetick matlabroot saveobj | |
| 780 display namelengthmax spaugment | |
| 781 expm1 nargoutchk strchr | |
| 782 filemarker pathdef strvcat | |
| 783 fstat perl subspace | |
| 784 full prctile symvar | |
| 785 fzero quantile treelayout | |
| 786 genvarname re_read_readline_init_file validatestring | |
| 787 histc | |
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788 |
| 8885 | 789 ** Changes to strcat. |
| 790 | |
| 791 The strcat function is now compatible with Matlab's strcat | |
| 792 function, which removes trailing whitespace when concatenating | |
| 793 character strings. For example | |
| 794 | |
| 795 strcat ('foo ', 'bar') | |
| 796 ==> 'foobar' | |
| 797 | |
| 798 The new function cstrcat provides the previous behavior of | |
| 799 Octave's strcat. | |
| 800 | |
| 801 ** Improvements to the help functions. | |
| 802 | |
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Rik <rdrider0-list@yahoo.com>
parents:
9031
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803 The help system has been mostly re-implemented in .m files to make |
| 8885 | 804 it easier to modify. Performance of the lookfor function has been |
| 805 greatly improved by caching the help text from all functions that | |
| 806 are distributed with Octave. The pkg function has been modified | |
| 807 to generate cache files for external packages when they are | |
| 808 installed. | |
| 809 | |
|
8888
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
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changeset
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810 ** Deprecated functions. |
|
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John W. Eaton <jwe@octave.org>
parents:
8885
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changeset
|
811 |
|
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John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
812 The following functions were deprecated in Octave 3.0 and will be |
|
11112
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
11111
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changeset
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813 removed from Octave 3.4 (or whatever version is the second major |
|
8888
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John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
814 release after 3.0): |
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0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
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|
815 |
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list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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changeset
|
816 beta_cdf geometric_pdf pascal_pdf |
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8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
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817 beta_inv geometric_rnd pascal_rnd |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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|
818 beta_pdf hypergeometric_cdf poisson_cdf |
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8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
11111
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changeset
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819 beta_rnd hypergeometric_inv poisson_inv |
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8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
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820 binomial_cdf hypergeometric_pdf poisson_pdf |
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8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
11111
diff
changeset
|
821 binomial_inv hypergeometric_rnd poisson_rnd |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
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822 binomial_pdf intersection polyinteg |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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|
823 binomial_rnd is_bool setstr |
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8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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824 chisquare_cdf is_complex struct_contains |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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changeset
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825 chisquare_inv is_list struct_elements |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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changeset
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826 chisquare_pdf is_matrix t_cdf |
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8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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changeset
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827 chisquare_rnd is_scalar t_inv |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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828 clearplot is_square t_pdf |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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829 clg is_stream t_rnd |
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8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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changeset
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830 com2str is_struct uniform_cdf |
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8ea4cf59c41b
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John W. Eaton <jwe@octave.org>
parents:
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changeset
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831 exponential_cdf is_symmetric uniform_inv |
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John W. Eaton <jwe@octave.org>
parents:
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changeset
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832 exponential_inv is_vector uniform_pdf |
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John W. Eaton <jwe@octave.org>
parents:
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833 exponential_pdf isstr uniform_rnd |
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8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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834 exponential_rnd lognormal_cdf weibcdf |
|
8ea4cf59c41b
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John W. Eaton <jwe@octave.org>
parents:
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835 f_cdf lognormal_inv weibinv |
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8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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836 f_inv lognormal_pdf weibpdf |
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John W. Eaton <jwe@octave.org>
parents:
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837 f_pdf lognormal_rnd weibrnd |
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8ea4cf59c41b
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John W. Eaton <jwe@octave.org>
parents:
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changeset
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838 f_rnd meshdom weibull_cdf |
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8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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839 gamma_cdf normal_cdf weibull_inv |
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8ea4cf59c41b
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John W. Eaton <jwe@octave.org>
parents:
11111
diff
changeset
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840 gamma_inv normal_inv weibull_pdf |
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8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
11111
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841 gamma_pdf normal_pdf weibull_rnd |
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list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
parents:
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842 gamma_rnd normal_rnd wiener_rnd |
|
8888
0c7b0049c023
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John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
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843 geometric_cdf pascal_cdf |
|
0c7b0049c023
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John W. Eaton <jwe@octave.org>
parents:
8885
diff
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844 geometric_inv pascal_inv |
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John W. Eaton <jwe@octave.org>
parents:
8885
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845 |
|
0c7b0049c023
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John W. Eaton <jwe@octave.org>
parents:
8885
diff
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846 The following functions are now deprecated in Octave 3.2 and will |
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John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
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847 be removed from Octave 3.6 (or whatever version is the second major |
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8888
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John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
848 release after 3.2): |
|
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John W. Eaton <jwe@octave.org>
parents:
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849 |
|
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John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
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850 create_set spcholinv spmax |
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0c7b0049c023
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John W. Eaton <jwe@octave.org>
parents:
8885
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851 dmult spcumprod spmin |
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John W. Eaton <jwe@octave.org>
parents:
8885
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852 iscommand spcumsum spprod |
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John W. Eaton <jwe@octave.org>
parents:
8885
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853 israwcommand spdet spqr |
|
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John W. Eaton <jwe@octave.org>
parents:
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854 lchol spdiag spsum |
|
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John W. Eaton <jwe@octave.org>
parents:
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855 loadimage spfind spsumsq |
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John W. Eaton <jwe@octave.org>
parents:
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856 mark_as_command spinv str2mat |
|
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John W. Eaton <jwe@octave.org>
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changeset
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857 mark_as_rawcommand spkron unmark_command |
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John W. Eaton <jwe@octave.org>
parents:
8885
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changeset
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858 spatan2 splchol unmark_rawcommand |
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859 spchol split |
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860 spchol2inv splu |
|
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John W. Eaton <jwe@octave.org>
parents:
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861 |
|
7990
86dae6e5b83c
Initial update of NEWS for 3.2 release
David Bateman <dbateman@free.fr>
parents:
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862 See NEWS.3 for old news. |