Mercurial > hg > octave-lyh
annotate NEWS @ 12709:96180026afc5 stable
maint: update NEWS.
* NEWS: Edit in preparation for 3.4.1 release.
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Thu, 02 Jun 2011 17:44:51 -0400 |
| parents | 013cd94d8d7f |
| children | f66dacbeb7be 89638f2b844a |
| rev | line source |
|---|---|
| 12709 | 1 Summary of important user-visible changes for version 3.4.1: |
| 2 ----------------------------------------------------------- | |
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3 |
| 12709 | 4 ** Octave 3.4.1 is primarily a bug fixing release. |
| 5 | |
| 6 ** IMPORTANT note about binary incompatibility in this release: | |
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7 |
| 12709 | 8 The original goal was to ensure binary compatibility for all 3.4.x |
| 9 releases but this is impossible for the 3.4.1 release due to a bug | |
| 10 in the way shared libraries were built in Octave 3.4.0. Because of | |
| 11 this bug, .oct files built for Octave 3.4.0 must be recompiled | |
| 12 before they will work with Octave 3.4.1. | |
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13 |
| 12709 | 14 Given that there would be binary incompatibilities with shared |
| 15 libraries going from Octave 3.4.0 to 3.4.1, we also made the | |
| 16 following incompatible changes in this release: | |
| 17 | |
| 18 * The Perl Compatible Regular Expression (PCRE) library is now | |
| 19 required to build Octave. | |
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20 |
| 12709 | 21 Any future Octave 3.4.x release versions should remain binary |
| 22 compatible with Octave 3.4.1 as we are now using proper library | |
| 23 versioning as recommended by the libtool manual. | |
| 24 | |
| 25 ** The following functions have been deprecated in Octave 3.4.1 and will | |
| 26 be removed from Octave 3.8 (or whatever version is the second major | |
| 27 release after 3.4): | |
| 28 | |
| 29 cquad is_duplicate_entry perror strerror | |
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30 |
| 12709 | 31 ** The following functions are new in 3.4.1: |
| 32 | |
| 33 colstyle iscolumn isrow | |
| 34 | |
| 35 ** The get_forge_pkg function is now private. | |
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36 |
| 12709 | 37 ** The rectangle_lw, rectangle_sw, triangle_lw, and triangle_sw |
| 38 functions are now private. | |
| 39 | |
| 40 ** The logistic_regression_derivatives and logistic_regression_likelihood | |
| 41 functions are now private. | |
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42 |
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43 Summary of important user-visible changes for version 3.4: |
| 9352 | 44 --------------------------------------------------------- |
| 45 | |
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46 ** BLAS and LAPACK libraries are now required to build Octave. The |
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47 subset of the reference BLAS and LAPACK libraries has been removed |
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48 from the Octave sources. |
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49 |
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50 ** The ARPACK library is now distributed with Octave so it no longer |
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51 needs to be available as an external dependency when building |
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52 Octave. |
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53 |
| 10118 | 54 ** The `lookup' function was extended to be more useful for |
| 55 general-purpose binary searching. Using this improvement, the | |
| 56 ismember function was rewritten for significantly better | |
| 57 performance. | |
| 9352 | 58 |
| 59 ** Real, integer and logical matrices, when used in indexing, will now | |
| 60 cache the internal index_vector value (zero-based indices) when | |
| 61 successfully used as indices, eliminating the conversion penalty for | |
| 10118 | 62 subsequent indexing by the same matrix. In particular, this means it |
| 63 is no longer needed to avoid repeated indexing by logical arrays | |
| 64 using find for performance reasons. | |
| 9888 | 65 |
| 10118 | 66 ** Logical matrices are now treated more efficiently when used as |
| 67 indices. Octave will keep the index as a logical mask unless the | |
| 68 ratio of true elements is small enough, using a specialized | |
| 69 code. Previously, all logical matrices were always first converted | |
| 70 to index vectors. This results in savings in both memory and | |
| 71 computing time. | |
| 9480 | 72 |
| 10118 | 73 ** The `sub2ind' and `ind2sub' functions were reimplemented as compiled |
| 74 functions for better performance. These functions are now faster, | |
| 75 can deliver more economized results for ranges, and can reuse the | |
| 76 index cache mechanism described in previous paragraph. | |
| 77 | |
| 78 ** The built-in function equivalents to associative operators (`plus', | |
| 79 `times', `mtimes', `and', and `or') have been extended to accept | |
| 80 multiple arguments. This is especially useful for summing | |
| 81 (multiplying, etc.) lists of objects (of possibly distinct types): | |
| 9408 | 82 |
| 9449 | 83 matrix_sum = plus (matrix_list{:}); |
| 84 | |
| 10118 | 85 ** An FTP object type based on libcurl has been implemented. These |
| 86 objects allow ftp connections, downloads and uploads to be | |
| 87 managed. For example, | |
| 9880 | 88 |
| 10118 | 89 fp = ftp ("ftp.octave.org); |
| 90 cd (fp, "gnu/octave"); | |
| 91 mget (fp, "octave-3.2.3.tar.bz2"); | |
| 92 close (fp); | |
| 9880 | 93 |
| 10118 | 94 ** The default behavior of `assert (observed, expected)' has been |
| 95 relaxed to employ less strict checking that does not require the | |
| 96 internals of the values to match. This avoids previously valid | |
| 97 tests from breaking due to new internal classes introduced in future | |
| 98 Octave versions. | |
| 9449 | 99 |
| 100 For instance, all of these assertions were true in Octave 3.0.x | |
| 101 but false in 3.2.x due to new optimizations and improvements: | |
| 102 | |
| 103 assert (2*linspace (1, 5, 5), 2*(1:5)) | |
| 104 assert (zeros (0, 0), []) | |
| 105 assert (2*ones (1, 5), (2) (ones (1,5))) | |
| 9462 | 106 |
| 10118 | 107 ** The behavior of library functions `ismatrix', `issquare', and |
| 108 `issymmetric' has been changed for better consistency. | |
| 9873 | 109 |
| 10292 | 110 * The `ismatrix' function now returns true for all numeric, |
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111 logical and character 2-D or N-D matrices. Previously, `ismatrix' |
| 10292 | 112 returned false if the first or second dimension was zero. |
| 113 Hence, `ismatrix ([])' was false, | |
| 114 while `ismatrix (zeros (1,2,0))' was true. | |
| 9873 | 115 |
| 10118 | 116 * The `issquare' function now returns a logical scalar, and is |
| 117 equivalent to the expression | |
| 118 | |
| 119 ismatrix (x) && ndims (x) == 2 && rows (x) == columns (x) | |
| 120 | |
| 121 The dimension is no longer returned. As a result, `issquare ([])' | |
| 122 now yields true. | |
| 9873 | 123 |
| 10118 | 124 * The `issymmetric' function now checks for symmetry instead of |
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125 Hermitianness. For the latter, ishermitian was created. Also, |
| 10118 | 126 logical scalar is returned rather than the dimension, so |
| 127 `issymmetric ([])' is now true. | |
| 9873 | 128 |
| 10118 | 129 ** Function handles are now aware of overloaded functions. If a |
| 130 function is overloaded, the handle determines at the time of its | |
| 131 reference which function to call. A non-overloaded version does not | |
| 132 need to exist. | |
| 9873 | 133 |
| 10118 | 134 ** Overloading functions for built-in classes (double, int8, cell, |
| 135 etc.) is now compatible with Matlab. | |
| 9408 | 136 |
| 10323 | 137 ** Function handles can now be compared with the == and != operators, |
| 138 as well as the `isequal' function. | |
| 139 | |
| 10118 | 140 ** Performance of concatenation (using []) and the functions `cat', |
| 141 `horzcat', and `vertcat' has been improved for multidimensional | |
| 142 arrays. | |
| 10117 | 143 |
| 9547 | 144 ** The operation-assignment operators +=, -=, *= and /= now behave more |
| 10118 | 145 efficiently in certain cases. For instance, if M is a matrix and S a |
| 146 scalar, then the statement | |
| 9547 | 147 |
| 10118 | 148 M += S; |
| 9547 | 149 |
| 10118 | 150 will operate on M's data in-place if it is not shared by another |
| 151 variable, usually increasing both time and memory efficiency. | |
| 9547 | 152 |
| 9558 | 153 Only selected common combinations are affected, namely: |
| 9547 | 154 |
| 155 matrix += matrix | |
| 156 matrix -= matrix | |
| 9558 | 157 matrix .*= matrix |
| 158 matrix ./= matrix | |
| 159 | |
| 9547 | 160 matrix += scalar |
| 161 matrix -= scalar | |
| 162 matrix *= scalar | |
| 163 matrix /= scalar | |
| 9558 | 164 |
| 9552 | 165 logical matrix |= logical matrix |
| 166 logical matrix &= logical matrix | |
| 9547 | 167 |
| 10118 | 168 where matrix and scalar belong to the same class. The left-hand |
| 169 side must be a simple variable reference. | |
| 9888 | 170 |
| 10118 | 171 Moreover, when unary operators occur in expressions, Octave will |
| 172 also try to do the operation in-place if it's argument is a | |
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173 temporary expression. |
| 9589 | 174 |
| 10118 | 175 ** The effect of comparison operators (<, >, <=, and >=) applied to |
| 176 complex numbers has changed to be consistent with the strict | |
| 177 ordering defined by the `max', `min', and `sort' functions. More | |
| 178 specifically, complex numbers are compared by lexicographical | |
| 179 comparison of the pairs `[abs(z), arg(z)]'. Previously, only real | |
| 180 parts were compared; this can be trivially achieved by wrapping the | |
| 181 operands in real(). | |
| 9547 | 182 |
| 10118 | 183 ** The automatic simplification of complex computation results has |
| 184 changed. Octave will now simplify any complex number with a zero | |
| 185 imaginary part or any complex matrix with all elements having zero | |
| 186 imaginary part to a real value. Previously, this was done only for | |
| 187 positive zeros. Note that the behavior of the complex function is | |
| 188 unchanged and it still produces a complex value even if the | |
| 189 imaginary part is zero. | |
| 9826 | 190 |
| 10118 | 191 ** As a side effect of code refactoring in liboctave, the binary |
| 192 logical operations are now more easily amenable to compiler | |
| 193 optimizations and are thus significantly faster. | |
| 9595 | 194 |
| 10118 | 195 ** Octave now allows user-defined `subsasgn' methods to optimize out |
| 196 redundant copies. For more information, see the manual. | |
| 9595 | 197 |
| 10453 | 198 ** More efficient matrix division handling. Octave is now able to |
| 10118 | 199 handle the expressions |
| 9664 | 200 |
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201 M' \ V |
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202 M.' \ V |
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203 V / M |
| 9664 | 204 |
| 10118 | 205 (M is a matrix and V is a vector) more efficiently in certain cases. |
| 206 In particular, if M is triangular, all three expressions will be | |
| 207 handled by a single call to xTRTRS (from LAPACK), with appropriate | |
| 10453 | 208 flags. Previously, all three expressions required a physical |
| 10118 | 209 transpose of M. |
| 9664 | 210 |
| 10118 | 211 ** More efficient handling of certain mixed real-complex matrix |
| 212 operations. For instance, if RM is a real matrix and CM a complex | |
| 213 matrix, | |
| 9664 | 214 |
| 10118 | 215 RM * CM |
| 9664 | 216 |
| 217 can now be evaluated either as | |
| 218 | |
| 219 complex (RM * real (CM), RM * imag (CM)) | |
| 220 | |
| 221 or as | |
| 222 | |
| 223 complex (RM) * CM, | |
| 224 | |
| 10453 | 225 depending on the dimensions. The first form requires more |
| 226 temporaries and copying, but halves the FLOP count, which normally | |
| 227 brings better performance if RM has enough rows. Previously, the | |
| 228 second form was always used. | |
| 9664 | 229 |
| 11111 | 230 Matrix division is similarly affected. |
| 9664 | 231 |
| 10118 | 232 ** More efficient handling of triangular matrix factors returned from |
| 233 factorizations. The functions for computing QR, LU and Cholesky | |
| 234 factorizations will now automatically return the triangular matrix | |
| 235 factors with proper internal matrix_type set, so that it won't need | |
| 236 to be computed when the matrix is used for division. | |
| 9717 | 237 |
| 10118 | 238 ** The built-in `sum' function now handles the non-native summation |
| 239 (i.e., double precision sum of single or integer inputs) more | |
| 240 efficiently, avoiding a temporary conversion of the whole input | |
| 241 array to doubles. Further, `sum' can now accept an extra option | |
| 242 argument, using a compensated summation algorithm rather than a | |
| 243 straightforward sum, which significantly improves precision if lots | |
| 244 of cancellation occurs in the summation. | |
| 9717 | 245 |
| 10118 | 246 ** The built-in `bsxfun' function now uses optimized code for certain |
| 247 cases where built-in operator handles are passed in. Namely, the | |
| 248 optimizations concern the operators `plus', `minus', `times', | |
| 249 `ldivide', `rdivide', `power', `and', `or' (for logical arrays), | |
| 250 the relational operators `eq', `ne', `lt', `le', `gt', `ge', and the | |
| 251 functions `min' and `max'. Optimizations only apply when both | |
| 252 operands are of the same built-in class. Mixed real/complex and | |
| 253 single/double operations will first convert both operands to a | |
| 254 common type. | |
| 9745 | 255 |
| 10118 | 256 ** The `strfind' and `strrep' functions now have compiled |
| 257 implementations, facilitating significantly more efficient searching | |
| 258 and replacing in strings, especially with longer patterns. The code | |
| 259 of `strcat' has been vectorized and is now much more efficient when | |
| 260 many strings are concatenated. The `strcmpi' and `strncmpi' | |
| 261 functions are now built-in functions, providing better performance. | |
| 10208 | 262 |
| 10453 | 263 ** Matlab-style ignoring input and output function arguments using |
| 11111 | 264 tilde (~) is now supported. Ignored output arguments may be |
| 265 detected from a function using the built-in function `isargout'. | |
| 266 For more details, consult the manual. | |
| 10886 | 267 |
| 10453 | 268 ** The list datatype, deprecated since the introduction of cells, has |
| 269 been removed. | |
| 10276 | 270 |
| 10453 | 271 ** The accumarray function has been optimized and is now significantly |
| 272 faster in certain important cases. | |
| 10054 | 273 |
| 10292 | 274 ** The behavior of isreal and isnumeric functions was changed to be more |
| 275 Matlab-compatible. | |
| 276 | |
| 10406 | 277 ** The integer math & conversion warnings (Octave:int-convert-nan, |
| 278 Octave:int-convert-non-int-val, Octave:int-convert-overflow, | |
| 11111 | 279 Octave:int-math-overflow) have been removed. |
| 10406 | 280 |
| 10453 | 281 ** rem and mod are now built-in functions. They also handle integer |
| 282 types efficiently using integer arithmetic. | |
| 10437 | 283 |
| 10536 | 284 ** Sparse indexing and indexed assignment has been mostly rewritten. |
| 285 Since Octave uses compressed column storage for sparse matrices, | |
| 286 major attention is devoted to operations manipulating whole columns. | |
| 287 Such operations are now significantly faster, as well as some other | |
| 288 important cases. | |
| 289 | |
| 290 Further, it is now possible to pre-allocate a sparse matrix and | |
| 291 subsequently fill it by assignments, provided they meet certain | |
| 292 conditions. For more information, consult the `spalloc' function, | |
| 293 which is no longer a mere dummy. Consequently, nzmax and nnz are no | |
| 11111 | 294 longer always equal in Octave. Octave may also produce a matrix |
| 295 with nnz < nzmax as a result of other operations, so you should | |
| 296 consistently use nnz unless you really want to use nzmax (i.e. the | |
| 297 space allocated for nonzero elements). | |
| 10536 | 298 |
| 299 Sparse concatenation is also affected, and concatenating sparse | |
| 300 matrices, especially larger collections, is now significantly more | |
| 11111 | 301 efficient. This applies to both the [] operator and the |
| 10536 | 302 cat/vertcat/horzcat functions. |
| 303 | |
| 11111 | 304 ** It is now possible to optionally employ the xGESDD LAPACK drivers |
| 305 for computing the singular value decomposition using svd(), instead | |
| 306 of the default xGESVD, using the configuration pseudo-variable | |
| 307 svd_driver. The xGESDD driver can be up to 6x times faster when | |
| 308 singular vectors are requested, but is reported to be somewhat less | |
| 10639 | 309 robust on highly ill-conditioned matrices. |
| 310 | |
| 311 ** Configuration pseudo-variables, such as page_screen_output or | |
| 312 confirm_recursive_rmdir (or the above mentioned svd_driver), now | |
| 313 accept a "local" option as second argument, requesting the change | |
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314 to be undone when the current function returns: |
| 10639 | 315 |
| 316 function [status, msg] = rm_rf (dir) | |
| 317 confirm_recursive_rmdir (false, "local"); | |
| 318 [status, msg] = rmdir (dir, "s"); | |
| 319 ... | |
| 320 endfunction | |
| 321 | |
| 322 Upon return, confirm_recursive_rmdir will be restored to the value | |
| 323 it had on entry to the function, even if there were subsequent | |
| 324 changes to the variable in function rm_rf or any of the functions | |
| 325 it calls. | |
| 326 | |
| 11111 | 327 ** pkg now accepts a -forge option for downloading and installing |
| 328 packages from Octave Forge automatically. For example, | |
| 10774 | 329 |
| 330 pkg install -forge general | |
| 331 | |
| 11111 | 332 will automatically download the latest release of the general |
| 333 package and attempt to install it. No automatic resolving of | |
| 334 dependencies is provided. Further, | |
| 10639 | 335 |
| 10774 | 336 pkg list -forge |
| 337 | |
| 338 can be used to list all available packages. | |
| 339 | |
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340 ** The internal data representation of structs has been completely |
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341 rewritten to make certain optimizations feasible. The field data |
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342 can now be shared between structs with equal keys but different |
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343 dimensions or values, making operations that preserve the fields |
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344 faster. Economized storage is now used for scalar structs (just |
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345 like most other scalars), making their usage more |
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346 memory-efficient. Certain array-like operations on structs |
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347 (concatenation, uniform cellfun, num2cell) have gained a |
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348 significant speed-up. Additionally, the octave_scalar_map class |
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349 now provides a simpler interface to work with scalar structs within |
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350 a C++ DLD function. |
| 10639 | 351 |
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352 ** Two new formats are available for displaying numbers: |
| 11111 | 353 |
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354 format short eng |
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355 format long eng |
| 11111 | 356 |
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357 Both display numbers in engineering notation, i.e., mantissa + |
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358 exponent where the exponent is a multiple of 3. |
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359 |
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360 ** The following functions are new in Octave 3.4: |
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361 accumdim divergence merge ppjumps strread |
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362 bitpack erfcx nfields pqpnonneg textread |
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363 bitunpack fileread nth_element quadcc uigetdir |
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364 blkmm fminbnd onCleanup randi uigetfile |
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365 cbrt fskipl pbaspect rectangle uiputfile |
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366 curl ifelse pie3 repelems uimenu |
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367 chop ishermitian powerset reset whitebg |
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368 colstyle isindex ppder rsf2csf |
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369 daspect luupdate ppint saveas |
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370 |
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371 ** Using the image function to view images with external programs such |
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372 as display, xv, and xloadimage is no longer supported. The |
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373 image_viewer function has also been removed. |
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374 |
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375 ** The behavior of struct assignments to non-struct values has been |
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376 changed. Previously, it was possible to overwrite an arbitrary |
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377 value: |
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378 |
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379 a = 1; |
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380 a.x = 2; |
| 10873 | 381 |
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382 This is no longer possible unless a is an empty matrix or cell |
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383 array. |
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384 |
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385 ** The dlmread function has been extended to allow specifying a custom |
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386 value for empty fields. |
| 10829 | 387 |
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388 ** The dlmread and dlmwrite functions have been modified to accept |
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389 file IDs (as returned by fopen) in addition to file names. |
| 11111 | 390 |
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391 ** Octave can now optimize away the interpreter overhead of an |
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392 anonymous function handle, if the function simply calls another |
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393 function or handle with some of its parameters bound to certain |
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394 values. Example: |
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395 |
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396 f = @(x) sum (x, 1); |
| 10966 | 397 |
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398 When f is called, the call is forwarded to @sum with the constant 1 |
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399 appended, and the anonymous function call does not occur on the |
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400 call stack. |
| 10829 | 401 |
| 12424 | 402 ** For compatibility with Matlab, mu2lin (x) is now equivalent to |
| 403 mu2lin (x, 0). | |
| 404 | |
| 405 ** The new function `history_control' may be used to control the way | |
| 406 command lines are added to the history list when Octave is using | |
| 407 readline for command-line editing. For example | |
| 408 | |
| 409 history_control ("ignoredups") | |
| 410 | |
| 411 tells Octave to avoid adding duplicate lines to the history list. | |
| 412 | |
| 413 ** Octave now uses the gnulib library for improved portability and to | |
| 414 avoid bugs in operating system functions. | |
| 415 | |
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416 ** Deprecated functions. |
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417 |
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418 The following functions were deprecated in Octave 3.0 and have been |
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419 removed from Octave 3.4. |
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420 |
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421 beta_cdf geometric_pdf pascal_pdf |
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422 beta_inv geometric_rnd pascal_rnd |
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423 beta_pdf hypergeometric_cdf poisson_cdf |
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424 beta_rnd hypergeometric_inv poisson_inv |
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425 binomial_cdf hypergeometric_pdf poisson_pdf |
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426 binomial_inv hypergeometric_rnd poisson_rnd |
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427 binomial_pdf intersection polyinteg |
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428 binomial_rnd is_bool setstr |
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429 chisquare_cdf is_complex struct_contains |
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430 chisquare_inv is_list struct_elements |
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431 chisquare_pdf is_matrix t_cdf |
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432 chisquare_rnd is_scalar t_inv |
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433 clearplot is_square t_pdf |
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434 clg is_stream t_rnd |
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435 com2str is_struct uniform_cdf |
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436 exponential_cdf is_symmetric uniform_inv |
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437 exponential_inv is_vector uniform_pdf |
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438 exponential_pdf isstr uniform_rnd |
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439 exponential_rnd lognormal_cdf weibcdf |
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440 f_cdf lognormal_inv weibinv |
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441 f_inv lognormal_pdf weibpdf |
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442 f_pdf lognormal_rnd weibrnd |
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443 f_rnd meshdom weibull_cdf |
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444 gamma_cdf normal_cdf weibull_inv |
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445 gamma_inv normal_inv weibull_pdf |
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446 gamma_pdf normal_pdf weibull_rnd |
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447 gamma_rnd normal_rnd wiener_rnd |
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448 geometric_cdf pascal_cdf |
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449 geometric_inv pascal_inv |
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450 |
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451 The following functions were deprecated in Octave 3.2 and will |
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452 be removed from Octave 3.6 (or whatever version is the second major |
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453 release after 3.2): |
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454 |
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455 create_set spcholinv splu |
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456 dmult spcumprod spmax |
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457 iscommand spcumsum spmin |
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458 israwcommand spdet spprod |
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459 lchol spdiag spqr |
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460 loadimage spfind spsum |
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461 mark_as_command sphcat spsumsq |
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462 mark_as_rawcommand spinv spvcat |
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463 spatan2 spkron str2mat |
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464 spchol splchol unmark_command |
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465 spchol2inv split unmark_rawcommand |
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466 |
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467 The following functions have been deprecated in Octave 3.4 and will |
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468 be removed from Octave 3.8 (or whatever version is the second major |
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469 release after 3.4): |
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470 |
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471 autocor cellidx fstat is_global replot values |
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472 autocov cquad gammai krylovb saveimage |
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473 betai dispatch glpkmex perror strerror |
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474 |
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475 Summary of important user-visible changes for version 3.2: |
| 5913 | 476 --------------------------------------------------------- |
| 2452 | 477 |
| 8737 | 478 ** Compatibility with Matlab graphics has been improved. |
| 6329 | 479 |
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480 The hggroup object and associated listener callback functions have |
| 8737 | 481 been added allowing the inclusion of group objects. Data sources |
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482 have been added to these group objects such that |
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483 |
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484 x = 0:0.1:10; |
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485 y = sin (x); |
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486 plot (x, y, "ydatasource", "y"); |
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487 for i = 1 : 100 |
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488 pause(0.1) |
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489 y = sin (x + 0.1 * i); |
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490 refreshdata(); |
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491 endfor |
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492 |
| 8737 | 493 works as expected. This capability has be used to introduce |
|
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494 stem-series, bar-series, etc., objects for better Matlab |
| 8737 | 495 compatibility. |
| 496 | |
| 497 ** New graphics functions: | |
| 498 | |
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499 addlistener ezcontour gcbo refresh |
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500 addproperty ezcontourf ginput refreshdata |
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501 allchild ezmesh gtext specular |
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502 available_graphics_toolkits ezmeshc intwarning surfl |
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503 graphics_toolkit ezplot ishghandle trisurf |
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504 cla ezplot3 isocolors waitforbuttonpress |
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505 clabel ezpolar isonormals |
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506 comet ezsurf isosurface |
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507 dellistener findall linkprop |
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508 diffuse gcbf plotmatrix |
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509 |
| 8737 | 510 ** New experimental OpenGL/FLTK based plotting system. |
| 511 | |
| 512 An experimental plotting system based on OpenGL and the FLTK | |
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513 toolkit is now part of Octave. This graphics toolkit is disabled by |
| 8737 | 514 default. You can switch to using it with the command |
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515 |
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516 graphics_toolkit ("fltk") |
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517 |
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518 for all future figures or for a particular figure with the command |
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519 |
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520 graphics_toolkit (h, "fltk") |
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521 |
| 11139 | 522 where "h" is a valid figure handle. |
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523 |
| 8737 | 524 ** Functions providing direct access to gnuplot have been removed. |
| 525 | |
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526 The functions __gnuplot_plot__, __gnuplot_set__, __gnuplot_raw__, |
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527 __gnuplot_show__, __gnuplot_replot__, __gnuplot_splot__, |
| 8737 | 528 __gnuplot_save_data__ and __gnuplot_send_inline_data__ have been |
| 529 removed from Octave. These function were incompatible with the | |
| 530 high level graphics handle code. | |
| 6329 | 531 |
| 8885 | 532 ** The Control, Finance and Quaternion functions have been removed. |
| 533 | |
| 534 These functions are now available as separate packages from | |
| 535 | |
| 536 http://octave.sourceforge.net/packages.html | |
| 537 | |
| 538 and can be reinstalled using the Octave package manager (see | |
| 539 the pkg function). | |
| 540 | |
| 541 ** Specific sparse matrix functions removed. | |
| 542 | |
| 543 The following functions, which handled only sparse matrices have | |
| 544 been removed. Instead of calling these functions directly, you | |
| 545 should use the corresponding function without the "sp" prefix. | |
| 8737 | 546 |
| 8885 | 547 spatan2 spcumsum spkron spprod |
| 548 spchol spdet splchol spqr | |
| 549 spchol2inv spdiag splu spsum | |
| 550 spcholinv spfind spmax spsumsqk | |
| 551 spcumprod spinv spmin | |
| 552 | |
| 553 ** Improvements to the debugger. | |
| 554 | |
| 555 The interactive debugging features have been improved. Stopping | |
| 556 on statements with dbstop should work correctly now. Stepping | |
| 557 into and over functions, and stepping one statement at a time | |
| 558 (with dbstep) now works. Moving up and down the call stack with | |
| 559 dbup and dbdown now works. The dbstack function is now available | |
| 560 to print the current function call stack. The new dbquit function | |
| 561 is available to exit the debugging mode. | |
| 562 | |
| 563 ** Improved traceback error messages. | |
| 564 | |
| 565 Traceback error messages are much more concise and easier to | |
| 566 understand. They now display information about the function call | |
| 567 stack instead of the stack of all statements that were active at | |
| 568 the point of the error. | |
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569 |
| 8737 | 570 ** Object Oriented Programming. |
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571 |
| 8737 | 572 Octave now includes OOP features and the user can create their own |
| 573 class objects and overloaded functions and operators. For | |
| 574 example, all methods of a class called "myclass" will be found in | |
| 575 a directory "@myclass" on the users path. The class specific | |
| 576 versions of functions and operators take precedence over the | |
| 577 generic versions of these functions. | |
| 578 | |
| 579 New functions related to OOP include | |
| 7189 | 580 |
| 8737 | 581 class inferiorto isobject loadobj methods superiorto |
| 582 | |
| 583 See the Octave manual for more details. | |
| 7038 | 584 |
| 8747 | 585 ** Parsing of Command-style Functions. |
| 586 | |
| 587 Octave now parses command-style functions without needing to first | |
| 588 declare them with "mark_as_command". The rules for recognizing a | |
| 589 command-style function calls are | |
| 590 | |
| 591 * A command must appear as the first word in a statement, | |
| 592 followed by a space. | |
| 593 | |
| 594 * The first character after the space must not be '=' or '(' | |
| 595 | |
| 596 * The next token after the space must not look like a binary | |
| 597 operator. | |
| 598 | |
| 599 These rules should be mostly compatible with the way Matlab parses | |
| 600 command-style function calls and allow users to define commands in | |
| 601 .m files without having to mark them as commands. | |
| 602 | |
| 603 Note that previous versions of Octave allowed expressions like | |
| 604 | |
| 605 x = load -text foo.dat | |
| 606 | |
| 607 but an expression like this will now generate a parse error. In | |
| 608 order to assign the value returned by a function to a variable, | |
| 609 you must use the normal function call syntax: | |
| 610 | |
| 611 x = load ("-text", "foo.dat"); | |
| 612 | |
| 8737 | 613 ** Block comments. |
| 614 | |
| 8747 | 615 Commented code can be between matching "#{" and "#}" or "%{" and |
| 616 "%}" markers, even if the commented code spans several line. This | |
| 617 allows blocks code to be commented, without needing to comment | |
| 618 each line. For example, | |
| 5814 | 619 |
| 8747 | 620 function [s, t] = func (x, y) |
| 621 s = 2 * x; | |
| 622 #{ | |
| 623 s *= y; | |
| 624 t = y + x; | |
| 625 #} | |
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626 endfunction |
| 5814 | 627 |
| 8747 | 628 the lines "s *= y;" and "t = y + x" will not be executed. |
| 8737 | 629 |
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630 ** If any subfunction in a file ends with "end" or "endfunction", then |
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631 they all must end that way. Previously, Octave accepted |
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632 |
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633 function main () |
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634 ... |
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635 # no endfunction here. |
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636 function sub () |
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637 ... |
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638 endfunction |
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639 |
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640 but this is no longer allowed. |
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641 |
| 8737 | 642 ** Special treatment in the parser of expressions like "a' * b". |
| 2452 | 643 |
| 8737 | 644 In these cases the transpose is no longer explicitly formed and |
| 645 BLAS libraries are called with the transpose flagged, | |
| 646 significantly improving performance for these kinds of | |
| 647 operations. | |
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648 |
| 8737 | 649 ** Single Precision data type. |
| 2452 | 650 |
| 8737 | 651 Octave now includes a single precision data type. Single |
| 652 precision variables can be created with the "single" command, or | |
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653 from functions like ones, eye, etc. For example, |
| 5995 | 654 |
| 8737 | 655 single (1) |
| 656 ones (2, 2, "single") | |
| 657 zeros (2, 2, "single") | |
| 658 eye (2, 2, "single") | |
| 659 Inf (2, 2, "single") | |
| 660 NaN (2, 2, "single") | |
| 661 NA (2, 2, "single") | |
| 7279 | 662 |
| 8737 | 663 all create single precision variables. For compatibility with |
| 664 Matlab, mixed double/single precision operators and functions | |
| 665 return single precision types. | |
| 666 | |
| 667 As a consequence of this addition to Octave the internal | |
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668 representation of the double precision NA value has changed, and |
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669 so users that make use of data generated by Octave with R or |
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670 visa-versa are warned that compatibility might not be assured. |
| 7279 | 671 |
| 8737 | 672 ** Improved array indexing. |
| 673 | |
| 674 The underlying code used for indexing of arrays has been | |
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675 completely rewritten and indexing is now significantly faster. |
| 8737 | 676 |
| 8755 | 677 ** Improved memory management. |
| 678 | |
| 679 Octave will now attempt to share data in some cases where previously | |
| 680 a copy would be made, such as certain array slicing operations or | |
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681 conversions between cells, structs and cs-lists. This usually reduces |
| 8755 | 682 both time and memory consumption. |
| 9128 | 683 Also, Octave will now attempt to detect and optimize usage of a vector |
| 684 as a stack, when elements are being repeatedly inserted at/removed from | |
| 685 the end of the vector. | |
| 8755 | 686 |
| 8738 | 687 ** Improved performance for reduction operations. |
| 688 | |
| 8755 | 689 The performance of the sum, prod, sumsq, cumsum, cumprod, any, all, |
| 690 max and min functions has been significantly improved. | |
| 8738 | 691 |
| 9006 | 692 ** Sorting and searching. |
| 693 | |
| 694 The performance of sort has been improved, especially when sorting | |
| 10453 | 695 indices are requested. An efficient built-in issorted |
| 696 implementation was added. The sortrows function now uses a more | |
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697 efficient algorithm, especially in the homogeneous case. The lookup |
| 10453 | 698 function is now a built-in function performing a binary search, |
| 699 optimized for long runs of close elements. Lookup also works with | |
| 700 cell arrays of strings. | |
| 9006 | 701 |
| 702 ** Range arithmetics | |
| 703 | |
| 10453 | 704 For some operations on ranges, Octave will attempt to keep the |
| 705 result as a range. These include negation, adding a scalar, | |
| 706 subtracting a scalar, and multiplying by a scalar. Ranges with zero | |
| 707 increment are allowed and can be constructed using the built-in | |
| 708 function `ones'. | |
| 9006 | 709 |
| 710 ** Various performance improvements. | |
| 711 | |
| 10453 | 712 Performance of a number of other built-in operations and functions |
| 713 was improved, including: | |
| 9006 | 714 |
| 715 * logical operations | |
| 716 * comparison operators | |
| 717 * element-wise power | |
| 718 * accumarray | |
| 719 * cellfun | |
| 720 * isnan | |
| 721 * isinf | |
| 722 * isfinite | |
| 723 * nchoosek | |
| 724 * repmat | |
| 725 * strcmp | |
| 726 | |
| 8737 | 727 ** 64-bit integer arithmetic. |
| 728 | |
| 729 Arithmetic with 64-bit integers (int64 and uint64 types) is fully | |
| 730 supported, with saturation semantics like the other integer types. | |
| 731 Performance of most integer arithmetic operations has been | |
| 732 improved by using integer arithmetic directly. Previously, Octave | |
| 733 performed integer math with saturation semantics by converting the | |
| 734 operands to double precision, performing the operation, and then | |
| 735 converting the result back to an integer value, truncating if | |
| 736 necessary. | |
| 737 | |
| 8885 | 738 ** Diagonal and permutation matrices. |
| 739 | |
| 740 The interpreter can now treat diagonal and permutation matrices as | |
| 741 special objects that store only the non-zero elements, rather than | |
| 742 general full matrices. Therefore, it is now possible to construct | |
| 743 and use these matrices in linear algebra without suffering a | |
| 744 performance penalty due to storing large numbers of zero elements. | |
| 745 | |
| 746 ** Improvements to fsolve. | |
| 747 | |
| 748 The fsolve function now accepts an option structure argument (see | |
| 749 also the optimset function). The INFO values returned from fsolve | |
| 750 have changed to be compatible with Matlab's fsolve function. | |
| 751 Additionally, fsolve is now able to solve overdetermined systems, | |
| 752 complex-differentiable complex systems, systems with a sparse | |
| 753 jacobian and can work in single precision if given single precision | |
|
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754 inputs. It can also be called recursively. |
| 8885 | 755 |
| 8737 | 756 ** Improvements to the norm function. |
| 757 | |
| 758 The norm function is now able to compute row or column norms of a | |
| 759 matrix in a single call, as well as general matrix p-norms. | |
| 760 | |
| 761 ** New functions for computing some eigenvalues or singular values. | |
| 762 | |
| 763 The eigs and svds functions have been included in Octave. These | |
| 764 functions require the ARPACK library (now distributed under a | |
| 765 GPL-compatible license). | |
| 766 | |
| 767 ** New QR and Cholesky factorization updating functions. | |
|
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768 |
| 8737 | 769 choldelete cholshift qrdelete qrshift |
| 770 cholinsert cholupdate qrinsert qrupdate | |
| 771 | |
| 772 ** New quadrature functions. | |
| 773 | |
| 774 dblquad quadgk quadv triplequad | |
| 775 | |
| 8885 | 776 ** New functions for reading and writing images. |
| 777 | |
| 778 The imwrite and imread functions have been included in Octave. | |
| 779 These functions require the GraphicsMagick library. The new | |
| 780 function imfinfo provides information about an image file (size, | |
| 781 type, colors, etc.) | |
| 782 | |
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783 ** The input_event_hook function has been replaced by the pair of |
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784 functions add_input_event_hook and remove_input_event_hook so that |
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785 more than one hook function may be installed at a time. |
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786 |
| 8737 | 787 ** Other miscellaneous new functions. |
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788 |
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789 addtodate hypot reallog |
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790 bicgstab idivide realpow |
| 9006 | 791 cellslices info realsqrt |
| 792 cgs interp1q rectint | |
| 793 command_line_path isdebugmode regexptranslate | |
| 794 contrast isfloat restoredefaultpath | |
| 795 convn isstrprop roundb | |
| 796 cummin log1p rundemos | |
| 797 cummax lsqnonneg runlength | |
| 798 datetick matlabroot saveobj | |
| 799 display namelengthmax spaugment | |
| 800 expm1 nargoutchk strchr | |
| 801 filemarker pathdef strvcat | |
| 802 fstat perl subspace | |
| 803 full prctile symvar | |
| 804 fzero quantile treelayout | |
| 805 genvarname re_read_readline_init_file validatestring | |
| 806 histc | |
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807 |
| 8885 | 808 ** Changes to strcat. |
| 809 | |
| 810 The strcat function is now compatible with Matlab's strcat | |
| 811 function, which removes trailing whitespace when concatenating | |
| 812 character strings. For example | |
| 813 | |
| 814 strcat ('foo ', 'bar') | |
| 815 ==> 'foobar' | |
| 816 | |
| 817 The new function cstrcat provides the previous behavior of | |
| 818 Octave's strcat. | |
| 819 | |
| 820 ** Improvements to the help functions. | |
| 821 | |
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822 The help system has been mostly re-implemented in .m files to make |
| 8885 | 823 it easier to modify. Performance of the lookfor function has been |
| 824 greatly improved by caching the help text from all functions that | |
| 825 are distributed with Octave. The pkg function has been modified | |
| 826 to generate cache files for external packages when they are | |
| 827 installed. | |
| 828 | |
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829 ** Deprecated functions. |
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830 |
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831 The following functions were deprecated in Octave 3.0 and will be |
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832 removed from Octave 3.4 (or whatever version is the second major |
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833 release after 3.0): |
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834 |
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835 beta_cdf geometric_pdf pascal_pdf |
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836 beta_inv geometric_rnd pascal_rnd |
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837 beta_pdf hypergeometric_cdf poisson_cdf |
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838 beta_rnd hypergeometric_inv poisson_inv |
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839 binomial_cdf hypergeometric_pdf poisson_pdf |
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840 binomial_inv hypergeometric_rnd poisson_rnd |
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841 binomial_pdf intersection polyinteg |
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842 binomial_rnd is_bool setstr |
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843 chisquare_cdf is_complex struct_contains |
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844 chisquare_inv is_list struct_elements |
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845 chisquare_pdf is_matrix t_cdf |
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846 chisquare_rnd is_scalar t_inv |
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847 clearplot is_square t_pdf |
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848 clg is_stream t_rnd |
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849 com2str is_struct uniform_cdf |
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850 exponential_cdf is_symmetric uniform_inv |
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851 exponential_inv is_vector uniform_pdf |
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852 exponential_pdf isstr uniform_rnd |
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853 exponential_rnd lognormal_cdf weibcdf |
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854 f_cdf lognormal_inv weibinv |
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855 f_inv lognormal_pdf weibpdf |
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856 f_pdf lognormal_rnd weibrnd |
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857 f_rnd meshdom weibull_cdf |
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858 gamma_cdf normal_cdf weibull_inv |
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859 gamma_inv normal_inv weibull_pdf |
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860 gamma_pdf normal_pdf weibull_rnd |
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861 gamma_rnd normal_rnd wiener_rnd |
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862 geometric_cdf pascal_cdf |
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863 geometric_inv pascal_inv |
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864 |
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865 The following functions are now deprecated in Octave 3.2 and will |
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866 be removed from Octave 3.6 (or whatever version is the second major |
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867 release after 3.2): |
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868 |
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869 create_set spcholinv spmax |
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870 dmult spcumprod spmin |
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871 iscommand spcumsum spprod |
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872 israwcommand spdet spqr |
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873 lchol spdiag spsum |
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874 loadimage spfind spsumsq |
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875 mark_as_command spinv str2mat |
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876 mark_as_rawcommand spkron unmark_command |
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877 spatan2 splchol unmark_rawcommand |
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878 spchol split |
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879 spchol2inv splu |
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880 |
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881 See NEWS.3 for old news. |