Mercurial > octave-nkf
annotate NEWS @ 12498:294c0927c762
Deprecate is_duplicate_entry.
| author | Rik <octave@nomad.inbox5.com> |
|---|---|
| date | Thu, 03 Mar 2011 09:46:00 -0800 |
| parents | bea828c03969 |
| children | 88558b8eb8a7 |
| rev | line source |
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1 Summary of important user-visible changes for version 3.6: |
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2 --------------------------------------------------------- |
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3 |
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4 ** The PCRE library is now required to build Octave. |
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5 |
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6 ** New functions added. |
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7 |
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8 iscolumn |
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9 issrow |
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10 |
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11 ** Deprecated functions. |
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12 |
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13 The following functions were deprecated in Octave 3.2 and have been |
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14 removed from Octave 3.6. |
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15 |
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16 create_set spcholinv splu |
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17 dmult spcumprod spmax |
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18 iscommand spcumsum spmin |
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19 israwcommand spdet spprod |
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20 lchol spdiag spqr |
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21 loadimage spfind spsum |
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22 mark_as_command sphcat spsumsq |
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23 mark_as_rawcommand spinv spvcat |
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24 spatan2 spkron str2mat |
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25 spchol splchol unmark_command |
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26 spchol2inv split unmark_rawcommand |
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27 |
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28 The following functions have been deprecated in Octave 3.6 and will |
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29 be removed from Octave 3.10 (or whatever version is the second major |
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30 release after 3.6): |
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31 |
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32 is_duplicate_entry |
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33 |
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34 |
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35 Summary of important user-visible changes for version 3.4: |
| 9352 | 36 --------------------------------------------------------- |
| 37 | |
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38 ** BLAS and LAPACK libraries are now required to build Octave. The |
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39 subset of the reference BLAS and LAPACK libraries has been removed |
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40 from the Octave sources. |
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41 |
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42 ** The ARPACK library is now distributed with Octave so it no longer |
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43 needs to be available as an external dependency when building |
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44 Octave. |
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45 |
| 10118 | 46 ** The `lookup' function was extended to be more useful for |
| 47 general-purpose binary searching. Using this improvement, the | |
| 48 ismember function was rewritten for significantly better | |
| 49 performance. | |
| 9352 | 50 |
| 51 ** Real, integer and logical matrices, when used in indexing, will now | |
| 52 cache the internal index_vector value (zero-based indices) when | |
| 53 successfully used as indices, eliminating the conversion penalty for | |
| 10118 | 54 subsequent indexing by the same matrix. In particular, this means it |
| 55 is no longer needed to avoid repeated indexing by logical arrays | |
| 56 using find for performance reasons. | |
| 9888 | 57 |
| 10118 | 58 ** Logical matrices are now treated more efficiently when used as |
| 59 indices. Octave will keep the index as a logical mask unless the | |
| 60 ratio of true elements is small enough, using a specialized | |
| 61 code. Previously, all logical matrices were always first converted | |
| 62 to index vectors. This results in savings in both memory and | |
| 63 computing time. | |
| 9480 | 64 |
| 10118 | 65 ** The `sub2ind' and `ind2sub' functions were reimplemented as compiled |
| 66 functions for better performance. These functions are now faster, | |
| 67 can deliver more economized results for ranges, and can reuse the | |
| 68 index cache mechanism described in previous paragraph. | |
| 69 | |
| 70 ** The built-in function equivalents to associative operators (`plus', | |
| 71 `times', `mtimes', `and', and `or') have been extended to accept | |
| 72 multiple arguments. This is especially useful for summing | |
| 73 (multiplying, etc.) lists of objects (of possibly distinct types): | |
| 9408 | 74 |
| 9449 | 75 matrix_sum = plus (matrix_list{:}); |
| 76 | |
| 10118 | 77 ** An FTP object type based on libcurl has been implemented. These |
| 78 objects allow ftp connections, downloads and uploads to be | |
| 79 managed. For example, | |
| 9880 | 80 |
| 10118 | 81 fp = ftp ("ftp.octave.org); |
| 82 cd (fp, "gnu/octave"); | |
| 83 mget (fp, "octave-3.2.3.tar.bz2"); | |
| 84 close (fp); | |
| 9880 | 85 |
| 10118 | 86 ** The default behavior of `assert (observed, expected)' has been |
| 87 relaxed to employ less strict checking that does not require the | |
| 88 internals of the values to match. This avoids previously valid | |
| 89 tests from breaking due to new internal classes introduced in future | |
| 90 Octave versions. | |
| 9449 | 91 |
| 92 For instance, all of these assertions were true in Octave 3.0.x | |
| 93 but false in 3.2.x due to new optimizations and improvements: | |
| 94 | |
| 95 assert (2*linspace (1, 5, 5), 2*(1:5)) | |
| 96 assert (zeros (0, 0), []) | |
| 97 assert (2*ones (1, 5), (2) (ones (1,5))) | |
| 9462 | 98 |
| 10118 | 99 ** The behavior of library functions `ismatrix', `issquare', and |
| 100 `issymmetric' has been changed for better consistency. | |
| 9873 | 101 |
| 10292 | 102 * The `ismatrix' function now returns true for all numeric, |
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103 logical and character 2-D or N-D matrices. Previously, `ismatrix' |
| 10292 | 104 returned false if the first or second dimension was zero. |
| 105 Hence, `ismatrix ([])' was false, | |
| 106 while `ismatrix (zeros (1,2,0))' was true. | |
| 9873 | 107 |
| 10118 | 108 * The `issquare' function now returns a logical scalar, and is |
| 109 equivalent to the expression | |
| 110 | |
| 111 ismatrix (x) && ndims (x) == 2 && rows (x) == columns (x) | |
| 112 | |
| 113 The dimension is no longer returned. As a result, `issquare ([])' | |
| 114 now yields true. | |
| 9873 | 115 |
| 10118 | 116 * The `issymmetric' function now checks for symmetry instead of |
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117 Hermitianness. For the latter, ishermitian was created. Also, |
| 10118 | 118 logical scalar is returned rather than the dimension, so |
| 119 `issymmetric ([])' is now true. | |
| 9873 | 120 |
| 10118 | 121 ** Function handles are now aware of overloaded functions. If a |
| 122 function is overloaded, the handle determines at the time of its | |
| 123 reference which function to call. A non-overloaded version does not | |
| 124 need to exist. | |
| 9873 | 125 |
| 10118 | 126 ** Overloading functions for built-in classes (double, int8, cell, |
| 127 etc.) is now compatible with Matlab. | |
| 9408 | 128 |
| 10323 | 129 ** Function handles can now be compared with the == and != operators, |
| 130 as well as the `isequal' function. | |
| 131 | |
| 10118 | 132 ** Performance of concatenation (using []) and the functions `cat', |
| 133 `horzcat', and `vertcat' has been improved for multidimensional | |
| 134 arrays. | |
| 10117 | 135 |
| 9547 | 136 ** The operation-assignment operators +=, -=, *= and /= now behave more |
| 10118 | 137 efficiently in certain cases. For instance, if M is a matrix and S a |
| 138 scalar, then the statement | |
| 9547 | 139 |
| 10118 | 140 M += S; |
| 9547 | 141 |
| 10118 | 142 will operate on M's data in-place if it is not shared by another |
| 143 variable, usually increasing both time and memory efficiency. | |
| 9547 | 144 |
| 9558 | 145 Only selected common combinations are affected, namely: |
| 9547 | 146 |
| 147 matrix += matrix | |
| 148 matrix -= matrix | |
| 9558 | 149 matrix .*= matrix |
| 150 matrix ./= matrix | |
| 151 | |
| 9547 | 152 matrix += scalar |
| 153 matrix -= scalar | |
| 154 matrix *= scalar | |
| 155 matrix /= scalar | |
| 9558 | 156 |
| 9552 | 157 logical matrix |= logical matrix |
| 158 logical matrix &= logical matrix | |
| 9547 | 159 |
| 10118 | 160 where matrix and scalar belong to the same class. The left-hand |
| 161 side must be a simple variable reference. | |
| 9888 | 162 |
| 10118 | 163 Moreover, when unary operators occur in expressions, Octave will |
| 164 also try to do the operation in-place if it's argument is a | |
| 165 temporary expresssion. | |
| 9589 | 166 |
| 10118 | 167 ** The effect of comparison operators (<, >, <=, and >=) applied to |
| 168 complex numbers has changed to be consistent with the strict | |
| 169 ordering defined by the `max', `min', and `sort' functions. More | |
| 170 specifically, complex numbers are compared by lexicographical | |
| 171 comparison of the pairs `[abs(z), arg(z)]'. Previously, only real | |
| 172 parts were compared; this can be trivially achieved by wrapping the | |
| 173 operands in real(). | |
| 9547 | 174 |
| 10118 | 175 ** The automatic simplification of complex computation results has |
| 176 changed. Octave will now simplify any complex number with a zero | |
| 177 imaginary part or any complex matrix with all elements having zero | |
| 178 imaginary part to a real value. Previously, this was done only for | |
| 179 positive zeros. Note that the behavior of the complex function is | |
| 180 unchanged and it still produces a complex value even if the | |
| 181 imaginary part is zero. | |
| 9826 | 182 |
| 10118 | 183 ** As a side effect of code refactoring in liboctave, the binary |
| 184 logical operations are now more easily amenable to compiler | |
| 185 optimizations and are thus significantly faster. | |
| 9595 | 186 |
| 10118 | 187 ** Octave now allows user-defined `subsasgn' methods to optimize out |
| 188 redundant copies. For more information, see the manual. | |
| 9595 | 189 |
| 10453 | 190 ** More efficient matrix division handling. Octave is now able to |
| 10118 | 191 handle the expressions |
| 9664 | 192 |
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193 M' \ V |
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194 M.' \ V |
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195 V / M |
| 9664 | 196 |
| 10118 | 197 (M is a matrix and V is a vector) more efficiently in certain cases. |
| 198 In particular, if M is triangular, all three expressions will be | |
| 199 handled by a single call to xTRTRS (from LAPACK), with appropriate | |
| 10453 | 200 flags. Previously, all three expressions required a physical |
| 10118 | 201 transpose of M. |
| 9664 | 202 |
| 10118 | 203 ** More efficient handling of certain mixed real-complex matrix |
| 204 operations. For instance, if RM is a real matrix and CM a complex | |
| 205 matrix, | |
| 9664 | 206 |
| 10118 | 207 RM * CM |
| 9664 | 208 |
| 209 can now be evaluated either as | |
| 210 | |
| 211 complex (RM * real (CM), RM * imag (CM)) | |
| 212 | |
| 213 or as | |
| 214 | |
| 215 complex (RM) * CM, | |
| 216 | |
| 10453 | 217 depending on the dimensions. The first form requires more |
| 218 temporaries and copying, but halves the FLOP count, which normally | |
| 219 brings better performance if RM has enough rows. Previously, the | |
| 220 second form was always used. | |
| 9664 | 221 |
| 11111 | 222 Matrix division is similarly affected. |
| 9664 | 223 |
| 10118 | 224 ** More efficient handling of triangular matrix factors returned from |
| 225 factorizations. The functions for computing QR, LU and Cholesky | |
| 226 factorizations will now automatically return the triangular matrix | |
| 227 factors with proper internal matrix_type set, so that it won't need | |
| 228 to be computed when the matrix is used for division. | |
| 9717 | 229 |
| 10118 | 230 ** The built-in `sum' function now handles the non-native summation |
| 231 (i.e., double precision sum of single or integer inputs) more | |
| 232 efficiently, avoiding a temporary conversion of the whole input | |
| 233 array to doubles. Further, `sum' can now accept an extra option | |
| 234 argument, using a compensated summation algorithm rather than a | |
| 235 straightforward sum, which significantly improves precision if lots | |
| 236 of cancellation occurs in the summation. | |
| 9717 | 237 |
| 10118 | 238 ** The built-in `bsxfun' function now uses optimized code for certain |
| 239 cases where built-in operator handles are passed in. Namely, the | |
| 240 optimizations concern the operators `plus', `minus', `times', | |
| 241 `ldivide', `rdivide', `power', `and', `or' (for logical arrays), | |
| 242 the relational operators `eq', `ne', `lt', `le', `gt', `ge', and the | |
| 243 functions `min' and `max'. Optimizations only apply when both | |
| 244 operands are of the same built-in class. Mixed real/complex and | |
| 245 single/double operations will first convert both operands to a | |
| 246 common type. | |
| 9745 | 247 |
| 10118 | 248 ** The `strfind' and `strrep' functions now have compiled |
| 249 implementations, facilitating significantly more efficient searching | |
| 250 and replacing in strings, especially with longer patterns. The code | |
| 251 of `strcat' has been vectorized and is now much more efficient when | |
| 252 many strings are concatenated. The `strcmpi' and `strncmpi' | |
| 253 functions are now built-in functions, providing better performance. | |
| 10208 | 254 |
| 10453 | 255 ** Matlab-style ignoring input and output function arguments using |
| 11111 | 256 tilde (~) is now supported. Ignored output arguments may be |
| 257 detected from a function using the built-in function `isargout'. | |
| 258 For more details, consult the manual. | |
| 10886 | 259 |
| 10453 | 260 ** The list datatype, deprecated since the introduction of cells, has |
| 261 been removed. | |
| 10276 | 262 |
| 10453 | 263 ** The accumarray function has been optimized and is now significantly |
| 264 faster in certain important cases. | |
| 10054 | 265 |
| 10292 | 266 ** The behavior of isreal and isnumeric functions was changed to be more |
| 267 Matlab-compatible. | |
| 268 | |
| 10406 | 269 ** The integer math & conversion warnings (Octave:int-convert-nan, |
| 270 Octave:int-convert-non-int-val, Octave:int-convert-overflow, | |
| 11111 | 271 Octave:int-math-overflow) have been removed. |
| 10406 | 272 |
| 10453 | 273 ** rem and mod are now built-in functions. They also handle integer |
| 274 types efficiently using integer arithmetic. | |
| 10437 | 275 |
| 10536 | 276 ** Sparse indexing and indexed assignment has been mostly rewritten. |
| 277 Since Octave uses compressed column storage for sparse matrices, | |
| 278 major attention is devoted to operations manipulating whole columns. | |
| 279 Such operations are now significantly faster, as well as some other | |
| 280 important cases. | |
| 281 | |
| 282 Further, it is now possible to pre-allocate a sparse matrix and | |
| 283 subsequently fill it by assignments, provided they meet certain | |
| 284 conditions. For more information, consult the `spalloc' function, | |
| 285 which is no longer a mere dummy. Consequently, nzmax and nnz are no | |
| 11111 | 286 longer always equal in Octave. Octave may also produce a matrix |
| 287 with nnz < nzmax as a result of other operations, so you should | |
| 288 consistently use nnz unless you really want to use nzmax (i.e. the | |
| 289 space allocated for nonzero elements). | |
| 10536 | 290 |
| 291 Sparse concatenation is also affected, and concatenating sparse | |
| 292 matrices, especially larger collections, is now significantly more | |
| 11111 | 293 efficient. This applies to both the [] operator and the |
| 10536 | 294 cat/vertcat/horzcat functions. |
| 295 | |
| 11111 | 296 ** It is now possible to optionally employ the xGESDD LAPACK drivers |
| 297 for computing the singular value decomposition using svd(), instead | |
| 298 of the default xGESVD, using the configuration pseudo-variable | |
| 299 svd_driver. The xGESDD driver can be up to 6x times faster when | |
| 300 singular vectors are requested, but is reported to be somewhat less | |
| 10639 | 301 robust on highly ill-conditioned matrices. |
| 302 | |
| 303 ** Configuration pseudo-variables, such as page_screen_output or | |
| 304 confirm_recursive_rmdir (or the above mentioned svd_driver), now | |
| 305 accept a "local" option as second argument, requesting the change | |
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306 to be undone when the current function returns: |
| 10639 | 307 |
| 308 function [status, msg] = rm_rf (dir) | |
| 309 confirm_recursive_rmdir (false, "local"); | |
| 310 [status, msg] = rmdir (dir, "s"); | |
| 311 ... | |
| 312 endfunction | |
| 313 | |
| 314 Upon return, confirm_recursive_rmdir will be restored to the value | |
| 315 it had on entry to the function, even if there were subsequent | |
| 316 changes to the variable in function rm_rf or any of the functions | |
| 317 it calls. | |
| 318 | |
| 11111 | 319 ** pkg now accepts a -forge option for downloading and installing |
| 320 packages from Octave Forge automatically. For example, | |
| 10774 | 321 |
| 322 pkg install -forge general | |
| 323 | |
| 11111 | 324 will automatically download the latest release of the general |
| 325 package and attempt to install it. No automatic resolving of | |
| 326 dependencies is provided. Further, | |
| 10639 | 327 |
| 10774 | 328 pkg list -forge |
| 329 | |
| 330 can be used to list all available packages. | |
| 331 | |
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332 ** The internal data representation of structs has been completely |
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333 rewritten to make certain optimizations feasible. The field data |
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334 can now be shared between structs with equal keys but different |
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335 dimensions or values, making operations that preserve the fields |
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336 faster. Economized storage is now used for scalar structs (just |
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337 like most other scalars), making their usage more |
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338 memory-efficient. Certain array-like operations on structs |
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339 (concatenation, uniform cellfun, num2cell) have gained a |
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340 significant speed-up. Additionally, the octave_scalar_map class |
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341 now provides a simpler interface to work with scalar structs within |
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342 a C++ DLD function. |
| 10639 | 343 |
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344 ** Two new formats are available for displaying numbers: |
| 11111 | 345 |
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346 format short eng |
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347 format long eng |
| 11111 | 348 |
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349 Both display numbers in engineering notation, i.e., mantissa + |
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350 exponent where the exponent is a multiple of 3. |
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351 |
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352 ** The following functions are new in Octave 3.4: |
| 10829 | 353 |
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354 accumdim erfcx nfields pqpnonneg uigetdir |
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355 bitpack fileread nth_element quadcc uigetfile |
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356 bitunpack fminbnd onCleanup randi uiputfile |
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357 blkmm fskipl pbaspect repelems uimenu |
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358 cbrt ifelse pie3 reset whitebg |
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359 curl ishermitian powerset rsf2csf |
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360 chop isindex ppder saveas |
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361 daspect luupdate ppint strread |
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362 divergence merge ppjumps textread |
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363 |
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364 ** Using the image function to view images with external programs such |
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365 as display, xv, and xloadimage is no longer supported. The |
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366 image_viewer function has also been removed. |
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367 |
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368 ** The behavior of struct assignments to non-struct values has been |
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369 changed. Previously, it was possible to overwrite an arbitrary |
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370 value: |
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371 |
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372 a = 1; |
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373 a.x = 2; |
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375 This is no longer possible unless a is an empty matrix or cell |
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376 array. |
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377 |
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378 ** The dlmread function has been extended to allow specifying a custom |
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379 value for empty fields. |
| 10829 | 380 |
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381 ** The dlmread and dlmwrite functions have been modified to accept |
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382 file IDs (as returned by fopen) in addition to file names. |
| 11111 | 383 |
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384 ** Octave can now optimize away the interpreter overhead of an |
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385 anonymous function handle, if the function simply calls another |
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386 function or handle with some of its parameters bound to certain |
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387 values. Example: |
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388 |
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389 f = @(x) sum (x, 1); |
| 10966 | 390 |
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391 When f is called, the call is forwarded to @sum with the constant 1 |
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392 appended, and the anonymous function call does not occur on the |
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393 call stack. |
| 10829 | 394 |
| 12424 | 395 ** For compatibility with Matlab, mu2lin (x) is now equivalent to |
| 396 mu2lin (x, 0). | |
| 397 | |
| 398 ** The new function `history_control' may be used to control the way | |
| 399 command lines are added to the history list when Octave is using | |
| 400 readline for command-line editing. For example | |
| 401 | |
| 402 history_control ("ignoredups") | |
| 403 | |
| 404 tells Octave to avoid adding duplicate lines to the history list. | |
| 405 | |
| 406 ** Octave now uses the gnulib library for improved portability and to | |
| 407 avoid bugs in operating system functions. | |
| 408 | |
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409 ** Deprecated functions. |
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410 |
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411 The following functions were deprecated in Octave 3.0 and have been |
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412 removed from Octave 3.4. |
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413 |
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414 beta_cdf geometric_pdf pascal_pdf |
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415 beta_inv geometric_rnd pascal_rnd |
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416 beta_pdf hypergeometric_cdf poisson_cdf |
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417 beta_rnd hypergeometric_inv poisson_inv |
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418 binomial_cdf hypergeometric_pdf poisson_pdf |
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419 binomial_inv hypergeometric_rnd poisson_rnd |
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420 binomial_pdf intersection polyinteg |
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421 binomial_rnd is_bool setstr |
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422 chisquare_cdf is_complex struct_contains |
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423 chisquare_inv is_list struct_elements |
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424 chisquare_pdf is_matrix t_cdf |
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425 chisquare_rnd is_scalar t_inv |
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426 clearplot is_square t_pdf |
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427 clg is_stream t_rnd |
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428 com2str is_struct uniform_cdf |
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429 exponential_cdf is_symmetric uniform_inv |
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430 exponential_inv is_vector uniform_pdf |
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431 exponential_pdf isstr uniform_rnd |
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432 exponential_rnd lognormal_cdf weibcdf |
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433 f_cdf lognormal_inv weibinv |
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434 f_inv lognormal_pdf weibpdf |
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435 f_pdf lognormal_rnd weibrnd |
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436 f_rnd meshdom weibull_cdf |
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437 gamma_cdf normal_cdf weibull_inv |
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438 gamma_inv normal_inv weibull_pdf |
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439 gamma_pdf normal_pdf weibull_rnd |
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440 gamma_rnd normal_rnd wiener_rnd |
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441 geometric_cdf pascal_cdf |
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442 geometric_inv pascal_inv |
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443 |
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444 The following functions were deprecated in Octave 3.2 and will |
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445 be removed from Octave 3.6 (or whatever version is the second major |
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446 release after 3.2): |
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447 |
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448 create_set spcholinv splu |
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449 dmult spcumprod spmax |
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450 iscommand spcumsum spmin |
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451 israwcommand spdet spprod |
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452 lchol spdiag spqr |
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453 loadimage spfind spsum |
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454 mark_as_command sphcat spsumsq |
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455 mark_as_rawcommand spinv spvcat |
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456 spatan2 spkron str2mat |
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457 spchol splchol unmark_command |
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458 spchol2inv split unmark_rawcommand |
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459 |
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460 The following functions have been deprecated in Octave 3.4 and will |
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461 be removed from Octave 3.8 (or whatever version is the second major |
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462 release after 3.4): |
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463 |
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464 autocor cellidx gammai krylovb values |
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465 autocov dispatch glpkmex replot |
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466 betai fstat is_global saveimage |
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467 |
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468 Summary of important user-visible changes for version 3.2: |
| 5913 | 469 --------------------------------------------------------- |
| 2452 | 470 |
| 8737 | 471 ** Compatibility with Matlab graphics has been improved. |
| 6329 | 472 |
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473 The hggroup object and associated listener callback functions have |
| 8737 | 474 been added allowing the inclusion of group objects. Data sources |
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475 have been added to these group objects such that |
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476 |
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477 x = 0:0.1:10; |
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478 y = sin (x); |
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479 plot (x, y, "ydatasource", "y"); |
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480 for i = 1 : 100 |
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481 pause(0.1) |
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482 y = sin (x + 0.1 * i); |
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483 refreshdata(); |
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484 endfor |
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485 |
| 8737 | 486 works as expected. This capability has be used to introduce |
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487 stem-series, bar-series, etc., objects for better Matlab |
| 8737 | 488 compatibility. |
| 489 | |
| 490 ** New graphics functions: | |
| 491 | |
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492 addlistener ezcontour gcbo refresh |
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493 addproperty ezcontourf ginput refreshdata |
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494 allchild ezmesh gtext specular |
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495 available_graphics_toolkits ezmeshc intwarning surfl |
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496 graphics_toolkit ezplot ishghandle trisurf |
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497 cla ezplot3 isocolors waitforbuttonpress |
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498 clabel ezpolar isonormals |
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499 comet ezsurf isosurface |
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500 dellistener findall linkprop |
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501 diffuse gcbf plotmatrix |
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502 |
| 8737 | 503 ** New experimental OpenGL/FLTK based plotting system. |
| 504 | |
| 505 An experimental plotting system based on OpenGL and the FLTK | |
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506 toolkit is now part of Octave. This graphics toolkit is disabled by |
| 8737 | 507 default. You can switch to using it with the command |
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508 |
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509 graphics_toolkit ("fltk") |
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510 |
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511 for all future figures or for a particular figure with the command |
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512 |
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513 graphics_toolkit (h, "fltk") |
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514 |
| 11139 | 515 where "h" is a valid figure handle. |
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516 |
| 8737 | 517 ** Functions providing direct access to gnuplot have been removed. |
| 518 | |
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519 The functions __gnuplot_plot__, __gnuplot_set__, __gnuplot_raw__, |
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520 __gnuplot_show__, __gnuplot_replot__, __gnuplot_splot__, |
| 8737 | 521 __gnuplot_save_data__ and __gnuplot_send_inline_data__ have been |
| 522 removed from Octave. These function were incompatible with the | |
| 523 high level graphics handle code. | |
| 6329 | 524 |
| 8885 | 525 ** The Control, Finance and Quaternion functions have been removed. |
| 526 | |
| 527 These functions are now available as separate packages from | |
| 528 | |
| 529 http://octave.sourceforge.net/packages.html | |
| 530 | |
| 531 and can be reinstalled using the Octave package manager (see | |
| 532 the pkg function). | |
| 533 | |
| 534 ** Specific sparse matrix functions removed. | |
| 535 | |
| 536 The following functions, which handled only sparse matrices have | |
| 537 been removed. Instead of calling these functions directly, you | |
| 538 should use the corresponding function without the "sp" prefix. | |
| 8737 | 539 |
| 8885 | 540 spatan2 spcumsum spkron spprod |
| 541 spchol spdet splchol spqr | |
| 542 spchol2inv spdiag splu spsum | |
| 543 spcholinv spfind spmax spsumsqk | |
| 544 spcumprod spinv spmin | |
| 545 | |
| 546 ** Improvements to the debugger. | |
| 547 | |
| 548 The interactive debugging features have been improved. Stopping | |
| 549 on statements with dbstop should work correctly now. Stepping | |
| 550 into and over functions, and stepping one statement at a time | |
| 551 (with dbstep) now works. Moving up and down the call stack with | |
| 552 dbup and dbdown now works. The dbstack function is now available | |
| 553 to print the current function call stack. The new dbquit function | |
| 554 is available to exit the debugging mode. | |
| 555 | |
| 556 ** Improved traceback error messages. | |
| 557 | |
| 558 Traceback error messages are much more concise and easier to | |
| 559 understand. They now display information about the function call | |
| 560 stack instead of the stack of all statements that were active at | |
| 561 the point of the error. | |
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562 |
| 8737 | 563 ** Object Oriented Programming. |
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564 |
| 8737 | 565 Octave now includes OOP features and the user can create their own |
| 566 class objects and overloaded functions and operators. For | |
| 567 example, all methods of a class called "myclass" will be found in | |
| 568 a directory "@myclass" on the users path. The class specific | |
| 569 versions of functions and operators take precedence over the | |
| 570 generic versions of these functions. | |
| 571 | |
| 572 New functions related to OOP include | |
| 7189 | 573 |
| 8737 | 574 class inferiorto isobject loadobj methods superiorto |
| 575 | |
| 576 See the Octave manual for more details. | |
| 7038 | 577 |
| 8747 | 578 ** Parsing of Command-style Functions. |
| 579 | |
| 580 Octave now parses command-style functions without needing to first | |
| 581 declare them with "mark_as_command". The rules for recognizing a | |
| 582 command-style function calls are | |
| 583 | |
| 584 * A command must appear as the first word in a statement, | |
| 585 followed by a space. | |
| 586 | |
| 587 * The first character after the space must not be '=' or '(' | |
| 588 | |
| 589 * The next token after the space must not look like a binary | |
| 590 operator. | |
| 591 | |
| 592 These rules should be mostly compatible with the way Matlab parses | |
| 593 command-style function calls and allow users to define commands in | |
| 594 .m files without having to mark them as commands. | |
| 595 | |
| 596 Note that previous versions of Octave allowed expressions like | |
| 597 | |
| 598 x = load -text foo.dat | |
| 599 | |
| 600 but an expression like this will now generate a parse error. In | |
| 601 order to assign the value returned by a function to a variable, | |
| 602 you must use the normal function call syntax: | |
| 603 | |
| 604 x = load ("-text", "foo.dat"); | |
| 605 | |
| 8737 | 606 ** Block comments. |
| 607 | |
| 8747 | 608 Commented code can be between matching "#{" and "#}" or "%{" and |
| 609 "%}" markers, even if the commented code spans several line. This | |
| 610 allows blocks code to be commented, without needing to comment | |
| 611 each line. For example, | |
| 5814 | 612 |
| 8747 | 613 function [s, t] = func (x, y) |
| 614 s = 2 * x; | |
| 615 #{ | |
| 616 s *= y; | |
| 617 t = y + x; | |
| 618 #} | |
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619 endfunction |
| 5814 | 620 |
| 8747 | 621 the lines "s *= y;" and "t = y + x" will not be executed. |
| 8737 | 622 |
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623 ** If any subfunction in a file ends with "end" or "endfunction", then |
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624 they all must end that way. Previously, Octave accepted |
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625 |
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626 function main () |
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627 ... |
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628 # no endfunction here. |
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629 function sub () |
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630 ... |
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631 endfunction |
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632 |
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633 but this is no longer allowed. |
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634 |
| 8737 | 635 ** Special treatment in the parser of expressions like "a' * b". |
| 2452 | 636 |
| 8737 | 637 In these cases the transpose is no longer explicitly formed and |
| 638 BLAS libraries are called with the transpose flagged, | |
| 639 significantly improving performance for these kinds of | |
| 640 operations. | |
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641 |
| 8737 | 642 ** Single Precision data type. |
| 2452 | 643 |
| 8737 | 644 Octave now includes a single precision data type. Single |
| 645 precision variables can be created with the "single" command, or | |
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646 from functions like ones, eye, etc. For example, |
| 5995 | 647 |
| 8737 | 648 single (1) |
| 649 ones (2, 2, "single") | |
| 650 zeros (2, 2, "single") | |
| 651 eye (2, 2, "single") | |
| 652 Inf (2, 2, "single") | |
| 653 NaN (2, 2, "single") | |
| 654 NA (2, 2, "single") | |
| 7279 | 655 |
| 8737 | 656 all create single precision variables. For compatibility with |
| 657 Matlab, mixed double/single precision operators and functions | |
| 658 return single precision types. | |
| 659 | |
| 660 As a consequence of this addition to Octave the internal | |
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661 representation of the double precision NA value has changed, and |
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662 so users that make use of data generated by Octave with R or |
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663 visa-versa are warned that compatibility might not be assured. |
| 7279 | 664 |
| 8737 | 665 ** Improved array indexing. |
| 666 | |
| 667 The underlying code used for indexing of arrays has been | |
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668 completely rewritten and indexing is now significantly faster. |
| 8737 | 669 |
| 8755 | 670 ** Improved memory management. |
| 671 | |
| 672 Octave will now attempt to share data in some cases where previously | |
| 673 a copy would be made, such as certain array slicing operations or | |
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674 conversions between cells, structs and cs-lists. This usually reduces |
| 8755 | 675 both time and memory consumption. |
| 9128 | 676 Also, Octave will now attempt to detect and optimize usage of a vector |
| 677 as a stack, when elements are being repeatedly inserted at/removed from | |
| 678 the end of the vector. | |
| 8755 | 679 |
| 8738 | 680 ** Improved performance for reduction operations. |
| 681 | |
| 8755 | 682 The performance of the sum, prod, sumsq, cumsum, cumprod, any, all, |
| 683 max and min functions has been significantly improved. | |
| 8738 | 684 |
| 9006 | 685 ** Sorting and searching. |
| 686 | |
| 687 The performance of sort has been improved, especially when sorting | |
| 10453 | 688 indices are requested. An efficient built-in issorted |
| 689 implementation was added. The sortrows function now uses a more | |
| 690 efficient algorithm, especially in the homegeneous case. The lookup | |
| 691 function is now a built-in function performing a binary search, | |
| 692 optimized for long runs of close elements. Lookup also works with | |
| 693 cell arrays of strings. | |
| 9006 | 694 |
| 695 ** Range arithmetics | |
| 696 | |
| 10453 | 697 For some operations on ranges, Octave will attempt to keep the |
| 698 result as a range. These include negation, adding a scalar, | |
| 699 subtracting a scalar, and multiplying by a scalar. Ranges with zero | |
| 700 increment are allowed and can be constructed using the built-in | |
| 701 function `ones'. | |
| 9006 | 702 |
| 703 ** Various performance improvements. | |
| 704 | |
| 10453 | 705 Performance of a number of other built-in operations and functions |
| 706 was improved, including: | |
| 9006 | 707 |
| 708 * logical operations | |
| 709 * comparison operators | |
| 710 * element-wise power | |
| 711 * accumarray | |
| 712 * cellfun | |
| 713 * isnan | |
| 714 * isinf | |
| 715 * isfinite | |
| 716 * nchoosek | |
| 717 * repmat | |
| 718 * strcmp | |
| 719 | |
| 8737 | 720 ** 64-bit integer arithmetic. |
| 721 | |
| 722 Arithmetic with 64-bit integers (int64 and uint64 types) is fully | |
| 723 supported, with saturation semantics like the other integer types. | |
| 724 Performance of most integer arithmetic operations has been | |
| 725 improved by using integer arithmetic directly. Previously, Octave | |
| 726 performed integer math with saturation semantics by converting the | |
| 727 operands to double precision, performing the operation, and then | |
| 728 converting the result back to an integer value, truncating if | |
| 729 necessary. | |
| 730 | |
| 8885 | 731 ** Diagonal and permutation matrices. |
| 732 | |
| 733 The interpreter can now treat diagonal and permutation matrices as | |
| 734 special objects that store only the non-zero elements, rather than | |
| 735 general full matrices. Therefore, it is now possible to construct | |
| 736 and use these matrices in linear algebra without suffering a | |
| 737 performance penalty due to storing large numbers of zero elements. | |
| 738 | |
| 739 ** Improvements to fsolve. | |
| 740 | |
| 741 The fsolve function now accepts an option structure argument (see | |
| 742 also the optimset function). The INFO values returned from fsolve | |
| 743 have changed to be compatible with Matlab's fsolve function. | |
| 744 Additionally, fsolve is now able to solve overdetermined systems, | |
| 745 complex-differentiable complex systems, systems with a sparse | |
| 746 jacobian and can work in single precision if given single precision | |
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747 inputs. It can also be called recursively. |
| 8885 | 748 |
| 8737 | 749 ** Improvements to the norm function. |
| 750 | |
| 751 The norm function is now able to compute row or column norms of a | |
| 752 matrix in a single call, as well as general matrix p-norms. | |
| 753 | |
| 754 ** New functions for computing some eigenvalues or singular values. | |
| 755 | |
| 756 The eigs and svds functions have been included in Octave. These | |
| 757 functions require the ARPACK library (now distributed under a | |
| 758 GPL-compatible license). | |
| 759 | |
| 760 ** New QR and Cholesky factorization updating functions. | |
|
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761 |
| 8737 | 762 choldelete cholshift qrdelete qrshift |
| 763 cholinsert cholupdate qrinsert qrupdate | |
| 764 | |
| 765 ** New quadrature functions. | |
| 766 | |
| 767 dblquad quadgk quadv triplequad | |
| 768 | |
| 8885 | 769 ** New functions for reading and writing images. |
| 770 | |
| 771 The imwrite and imread functions have been included in Octave. | |
| 772 These functions require the GraphicsMagick library. The new | |
| 773 function imfinfo provides information about an image file (size, | |
| 774 type, colors, etc.) | |
| 775 | |
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776 ** The input_event_hook function has been replaced by the pair of |
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777 functions add_input_event_hook and remove_input_event_hook so that |
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778 more than one hook function may be installed at a time. |
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779 |
| 8737 | 780 ** Other miscellaneous new functions. |
|
8370
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781 |
|
8932
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782 addtodate hypot reallog |
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783 bicgstab idivide realpow |
| 9006 | 784 cellslices info realsqrt |
| 785 cgs interp1q rectint | |
| 786 command_line_path isdebugmode regexptranslate | |
| 787 contrast isfloat restoredefaultpath | |
| 788 convn isstrprop roundb | |
| 789 cummin log1p rundemos | |
| 790 cummax lsqnonneg runlength | |
| 791 datetick matlabroot saveobj | |
| 792 display namelengthmax spaugment | |
| 793 expm1 nargoutchk strchr | |
| 794 filemarker pathdef strvcat | |
| 795 fstat perl subspace | |
| 796 full prctile symvar | |
| 797 fzero quantile treelayout | |
| 798 genvarname re_read_readline_init_file validatestring | |
| 799 histc | |
|
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800 |
| 8885 | 801 ** Changes to strcat. |
| 802 | |
| 803 The strcat function is now compatible with Matlab's strcat | |
| 804 function, which removes trailing whitespace when concatenating | |
| 805 character strings. For example | |
| 806 | |
| 807 strcat ('foo ', 'bar') | |
| 808 ==> 'foobar' | |
| 809 | |
| 810 The new function cstrcat provides the previous behavior of | |
| 811 Octave's strcat. | |
| 812 | |
| 813 ** Improvements to the help functions. | |
| 814 | |
|
9034
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815 The help system has been mostly re-implemented in .m files to make |
| 8885 | 816 it easier to modify. Performance of the lookfor function has been |
| 817 greatly improved by caching the help text from all functions that | |
| 818 are distributed with Octave. The pkg function has been modified | |
| 819 to generate cache files for external packages when they are | |
| 820 installed. | |
| 821 | |
|
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822 ** Deprecated functions. |
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823 |
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824 The following functions were deprecated in Octave 3.0 and will be |
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825 removed from Octave 3.4 (or whatever version is the second major |
|
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826 release after 3.0): |
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827 |
|
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828 beta_cdf geometric_pdf pascal_pdf |
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829 beta_inv geometric_rnd pascal_rnd |
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830 beta_pdf hypergeometric_cdf poisson_cdf |
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831 beta_rnd hypergeometric_inv poisson_inv |
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832 binomial_cdf hypergeometric_pdf poisson_pdf |
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833 binomial_inv hypergeometric_rnd poisson_rnd |
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834 binomial_pdf intersection polyinteg |
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835 binomial_rnd is_bool setstr |
|
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836 chisquare_cdf is_complex struct_contains |
|
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837 chisquare_inv is_list struct_elements |
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838 chisquare_pdf is_matrix t_cdf |
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839 chisquare_rnd is_scalar t_inv |
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840 clearplot is_square t_pdf |
|
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841 clg is_stream t_rnd |
|
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842 com2str is_struct uniform_cdf |
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843 exponential_cdf is_symmetric uniform_inv |
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844 exponential_inv is_vector uniform_pdf |
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845 exponential_pdf isstr uniform_rnd |
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846 exponential_rnd lognormal_cdf weibcdf |
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847 f_cdf lognormal_inv weibinv |
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848 f_inv lognormal_pdf weibpdf |
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849 f_pdf lognormal_rnd weibrnd |
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850 f_rnd meshdom weibull_cdf |
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851 gamma_cdf normal_cdf weibull_inv |
|
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852 gamma_inv normal_inv weibull_pdf |
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853 gamma_pdf normal_pdf weibull_rnd |
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854 gamma_rnd normal_rnd wiener_rnd |
|
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855 geometric_cdf pascal_cdf |
|
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|
856 geometric_inv pascal_inv |
|
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|
857 |
|
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|
858 The following functions are now deprecated in Octave 3.2 and will |
|
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859 be removed from Octave 3.6 (or whatever version is the second major |
|
8888
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|
860 release after 3.2): |
|
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|
861 |
|
0c7b0049c023
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|
862 create_set spcholinv spmax |
|
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|
863 dmult spcumprod spmin |
|
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864 iscommand spcumsum spprod |
|
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|
865 israwcommand spdet spqr |
|
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866 lchol spdiag spsum |
|
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867 loadimage spfind spsumsq |
|
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868 mark_as_command spinv str2mat |
|
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869 mark_as_rawcommand spkron unmark_command |
|
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870 spatan2 splchol unmark_rawcommand |
|
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871 spchol split |
|
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|
872 spchol2inv splu |
|
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|
873 |
|
7990
86dae6e5b83c
Initial update of NEWS for 3.2 release
David Bateman <dbateman@free.fr>
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changeset
|
874 See NEWS.3 for old news. |