Mercurial > hg > octave-jordi
annotate NEWS @ 11154:92a7c136ab35
Update NEWS with more deprecated functions from version 3.4
| author | Rik <octave@nomad.inbox5.com> |
|---|---|
| date | Sun, 24 Oct 2010 12:41:21 -0700 |
| parents | 0dd95d1d57e6 |
| children | f0e9befd6a1c |
| rev | line source |
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1 Summary of important user-visible changes for version 3.4: |
| 9352 | 2 --------------------------------------------------------- |
| 3 | |
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4 ** BLAS and LAPACK libraries are now required to build Octave. The |
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5 subset of the reference BLAS and LAPACK libraries has been removed |
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6 from the Octave sources. |
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7 |
| 10118 | 8 ** The `lookup' function was extended to be more useful for |
| 9 general-purpose binary searching. Using this improvement, the | |
| 10 ismember function was rewritten for significantly better | |
| 11 performance. | |
| 9352 | 12 |
| 13 ** Real, integer and logical matrices, when used in indexing, will now | |
| 14 cache the internal index_vector value (zero-based indices) when | |
| 15 successfully used as indices, eliminating the conversion penalty for | |
| 10118 | 16 subsequent indexing by the same matrix. In particular, this means it |
| 17 is no longer needed to avoid repeated indexing by logical arrays | |
| 18 using find for performance reasons. | |
| 9888 | 19 |
| 10118 | 20 ** Logical matrices are now treated more efficiently when used as |
| 21 indices. Octave will keep the index as a logical mask unless the | |
| 22 ratio of true elements is small enough, using a specialized | |
| 23 code. Previously, all logical matrices were always first converted | |
| 24 to index vectors. This results in savings in both memory and | |
| 25 computing time. | |
| 9480 | 26 |
| 10118 | 27 ** The `sub2ind' and `ind2sub' functions were reimplemented as compiled |
| 28 functions for better performance. These functions are now faster, | |
| 29 can deliver more economized results for ranges, and can reuse the | |
| 30 index cache mechanism described in previous paragraph. | |
| 31 | |
| 32 ** The built-in function equivalents to associative operators (`plus', | |
| 33 `times', `mtimes', `and', and `or') have been extended to accept | |
| 34 multiple arguments. This is especially useful for summing | |
| 35 (multiplying, etc.) lists of objects (of possibly distinct types): | |
| 9408 | 36 |
| 9449 | 37 matrix_sum = plus (matrix_list{:}); |
| 38 | |
| 10118 | 39 ** An FTP object type based on libcurl has been implemented. These |
| 40 objects allow ftp connections, downloads and uploads to be | |
| 41 managed. For example, | |
| 9880 | 42 |
| 10118 | 43 fp = ftp ("ftp.octave.org); |
| 44 cd (fp, "gnu/octave"); | |
| 45 mget (fp, "octave-3.2.3.tar.bz2"); | |
| 46 close (fp); | |
| 9880 | 47 |
| 10118 | 48 ** The default behavior of `assert (observed, expected)' has been |
| 49 relaxed to employ less strict checking that does not require the | |
| 50 internals of the values to match. This avoids previously valid | |
| 51 tests from breaking due to new internal classes introduced in future | |
| 52 Octave versions. | |
| 9449 | 53 |
| 54 For instance, all of these assertions were true in Octave 3.0.x | |
| 55 but false in 3.2.x due to new optimizations and improvements: | |
| 56 | |
| 57 assert (2*linspace (1, 5, 5), 2*(1:5)) | |
| 58 assert (zeros (0, 0), []) | |
| 59 assert (2*ones (1, 5), (2) (ones (1,5))) | |
| 9462 | 60 |
| 10118 | 61 ** The behavior of library functions `ismatrix', `issquare', and |
| 62 `issymmetric' has been changed for better consistency. | |
| 9873 | 63 |
| 10292 | 64 * The `ismatrix' function now returns true for all numeric, |
| 65 logical and character 2d or Nd matrices. Previously, `ismatrix' | |
| 66 returned false if the first or second dimension was zero. | |
| 67 Hence, `ismatrix ([])' was false, | |
| 68 while `ismatrix (zeros (1,2,0))' was true. | |
| 9873 | 69 |
| 10118 | 70 * The `issquare' function now returns a logical scalar, and is |
| 71 equivalent to the expression | |
| 72 | |
| 73 ismatrix (x) && ndims (x) == 2 && rows (x) == columns (x) | |
| 74 | |
| 75 The dimension is no longer returned. As a result, `issquare ([])' | |
| 76 now yields true. | |
| 9873 | 77 |
| 10118 | 78 * The `issymmetric' function now checks for symmetry instead of |
| 79 hermitianness. For the latter, ishermitian was created. Also, | |
| 80 logical scalar is returned rather than the dimension, so | |
| 81 `issymmetric ([])' is now true. | |
| 9873 | 82 |
| 10118 | 83 ** Function handles are now aware of overloaded functions. If a |
| 84 function is overloaded, the handle determines at the time of its | |
| 85 reference which function to call. A non-overloaded version does not | |
| 86 need to exist. | |
| 9873 | 87 |
| 10118 | 88 ** Overloading functions for built-in classes (double, int8, cell, |
| 89 etc.) is now compatible with Matlab. | |
| 9408 | 90 |
| 10323 | 91 ** Function handles can now be compared with the == and != operators, |
| 92 as well as the `isequal' function. | |
| 93 | |
| 10118 | 94 ** Performance of concatenation (using []) and the functions `cat', |
| 95 `horzcat', and `vertcat' has been improved for multidimensional | |
| 96 arrays. | |
| 10117 | 97 |
| 9547 | 98 ** The operation-assignment operators +=, -=, *= and /= now behave more |
| 10118 | 99 efficiently in certain cases. For instance, if M is a matrix and S a |
| 100 scalar, then the statement | |
| 9547 | 101 |
| 10118 | 102 M += S; |
| 9547 | 103 |
| 10118 | 104 will operate on M's data in-place if it is not shared by another |
| 105 variable, usually increasing both time and memory efficiency. | |
| 9547 | 106 |
| 9558 | 107 Only selected common combinations are affected, namely: |
| 9547 | 108 |
| 109 matrix += matrix | |
| 110 matrix -= matrix | |
| 9558 | 111 matrix .*= matrix |
| 112 matrix ./= matrix | |
| 113 | |
| 9547 | 114 matrix += scalar |
| 115 matrix -= scalar | |
| 116 matrix *= scalar | |
| 117 matrix /= scalar | |
| 9558 | 118 |
| 9552 | 119 logical matrix |= logical matrix |
| 120 logical matrix &= logical matrix | |
| 9547 | 121 |
| 10118 | 122 where matrix and scalar belong to the same class. The left-hand |
| 123 side must be a simple variable reference. | |
| 9888 | 124 |
| 10118 | 125 Moreover, when unary operators occur in expressions, Octave will |
| 126 also try to do the operation in-place if it's argument is a | |
| 127 temporary expresssion. | |
| 9589 | 128 |
| 10118 | 129 ** The effect of comparison operators (<, >, <=, and >=) applied to |
| 130 complex numbers has changed to be consistent with the strict | |
| 131 ordering defined by the `max', `min', and `sort' functions. More | |
| 132 specifically, complex numbers are compared by lexicographical | |
| 133 comparison of the pairs `[abs(z), arg(z)]'. Previously, only real | |
| 134 parts were compared; this can be trivially achieved by wrapping the | |
| 135 operands in real(). | |
| 9547 | 136 |
| 10118 | 137 ** The automatic simplification of complex computation results has |
| 138 changed. Octave will now simplify any complex number with a zero | |
| 139 imaginary part or any complex matrix with all elements having zero | |
| 140 imaginary part to a real value. Previously, this was done only for | |
| 141 positive zeros. Note that the behavior of the complex function is | |
| 142 unchanged and it still produces a complex value even if the | |
| 143 imaginary part is zero. | |
| 9826 | 144 |
| 10118 | 145 ** As a side effect of code refactoring in liboctave, the binary |
| 146 logical operations are now more easily amenable to compiler | |
| 147 optimizations and are thus significantly faster. | |
| 9595 | 148 |
| 10118 | 149 ** Octave now allows user-defined `subsasgn' methods to optimize out |
| 150 redundant copies. For more information, see the manual. | |
| 9595 | 151 |
| 10453 | 152 ** More efficient matrix division handling. Octave is now able to |
| 10118 | 153 handle the expressions |
| 9664 | 154 |
| 10118 | 155 M' \ V |
| 156 M.' \ V | |
| 157 V / M | |
| 9664 | 158 |
| 10118 | 159 (M is a matrix and V is a vector) more efficiently in certain cases. |
| 160 In particular, if M is triangular, all three expressions will be | |
| 161 handled by a single call to xTRTRS (from LAPACK), with appropriate | |
| 10453 | 162 flags. Previously, all three expressions required a physical |
| 10118 | 163 transpose of M. |
| 9664 | 164 |
| 10118 | 165 ** More efficient handling of certain mixed real-complex matrix |
| 166 operations. For instance, if RM is a real matrix and CM a complex | |
| 167 matrix, | |
| 9664 | 168 |
| 10118 | 169 RM * CM |
| 9664 | 170 |
| 171 can now be evaluated either as | |
| 172 | |
| 173 complex (RM * real (CM), RM * imag (CM)) | |
| 174 | |
| 175 or as | |
| 176 | |
| 177 complex (RM) * CM, | |
| 178 | |
| 10453 | 179 depending on the dimensions. The first form requires more |
| 180 temporaries and copying, but halves the FLOP count, which normally | |
| 181 brings better performance if RM has enough rows. Previously, the | |
| 182 second form was always used. | |
| 9664 | 183 |
| 11111 | 184 Matrix division is similarly affected. |
| 9664 | 185 |
| 10118 | 186 ** More efficient handling of triangular matrix factors returned from |
| 187 factorizations. The functions for computing QR, LU and Cholesky | |
| 188 factorizations will now automatically return the triangular matrix | |
| 189 factors with proper internal matrix_type set, so that it won't need | |
| 190 to be computed when the matrix is used for division. | |
| 9717 | 191 |
| 10118 | 192 ** The built-in `sum' function now handles the non-native summation |
| 193 (i.e., double precision sum of single or integer inputs) more | |
| 194 efficiently, avoiding a temporary conversion of the whole input | |
| 195 array to doubles. Further, `sum' can now accept an extra option | |
| 196 argument, using a compensated summation algorithm rather than a | |
| 197 straightforward sum, which significantly improves precision if lots | |
| 198 of cancellation occurs in the summation. | |
| 9717 | 199 |
| 10118 | 200 ** The built-in `bsxfun' function now uses optimized code for certain |
| 201 cases where built-in operator handles are passed in. Namely, the | |
| 202 optimizations concern the operators `plus', `minus', `times', | |
| 203 `ldivide', `rdivide', `power', `and', `or' (for logical arrays), | |
| 204 the relational operators `eq', `ne', `lt', `le', `gt', `ge', and the | |
| 205 functions `min' and `max'. Optimizations only apply when both | |
| 206 operands are of the same built-in class. Mixed real/complex and | |
| 207 single/double operations will first convert both operands to a | |
| 208 common type. | |
| 9745 | 209 |
| 10118 | 210 ** The `strfind' and `strrep' functions now have compiled |
| 211 implementations, facilitating significantly more efficient searching | |
| 212 and replacing in strings, especially with longer patterns. The code | |
| 213 of `strcat' has been vectorized and is now much more efficient when | |
| 214 many strings are concatenated. The `strcmpi' and `strncmpi' | |
| 215 functions are now built-in functions, providing better performance. | |
| 10208 | 216 |
| 10453 | 217 ** Matlab-style ignoring input and output function arguments using |
| 11111 | 218 tilde (~) is now supported. Ignored output arguments may be |
| 219 detected from a function using the built-in function `isargout'. | |
| 220 For more details, consult the manual. | |
| 10886 | 221 |
| 10453 | 222 ** The list datatype, deprecated since the introduction of cells, has |
| 223 been removed. | |
| 10276 | 224 |
| 10453 | 225 ** The accumarray function has been optimized and is now significantly |
| 226 faster in certain important cases. | |
| 10054 | 227 |
| 10292 | 228 ** The behavior of isreal and isnumeric functions was changed to be more |
| 229 Matlab-compatible. | |
| 230 | |
| 10406 | 231 ** The integer math & conversion warnings (Octave:int-convert-nan, |
| 232 Octave:int-convert-non-int-val, Octave:int-convert-overflow, | |
| 11111 | 233 Octave:int-math-overflow) have been removed. |
| 10406 | 234 |
| 10453 | 235 ** rem and mod are now built-in functions. They also handle integer |
| 236 types efficiently using integer arithmetic. | |
| 10437 | 237 |
| 10536 | 238 ** Sparse indexing and indexed assignment has been mostly rewritten. |
| 239 Since Octave uses compressed column storage for sparse matrices, | |
| 240 major attention is devoted to operations manipulating whole columns. | |
| 241 Such operations are now significantly faster, as well as some other | |
| 242 important cases. | |
| 243 | |
| 244 Further, it is now possible to pre-allocate a sparse matrix and | |
| 245 subsequently fill it by assignments, provided they meet certain | |
| 246 conditions. For more information, consult the `spalloc' function, | |
| 247 which is no longer a mere dummy. Consequently, nzmax and nnz are no | |
| 11111 | 248 longer always equal in Octave. Octave may also produce a matrix |
| 249 with nnz < nzmax as a result of other operations, so you should | |
| 250 consistently use nnz unless you really want to use nzmax (i.e. the | |
| 251 space allocated for nonzero elements). | |
| 10536 | 252 |
| 253 Sparse concatenation is also affected, and concatenating sparse | |
| 254 matrices, especially larger collections, is now significantly more | |
| 11111 | 255 efficient. This applies to both the [] operator and the |
| 10536 | 256 cat/vertcat/horzcat functions. |
| 257 | |
| 11111 | 258 ** It is now possible to optionally employ the xGESDD LAPACK drivers |
| 259 for computing the singular value decomposition using svd(), instead | |
| 260 of the default xGESVD, using the configuration pseudo-variable | |
| 261 svd_driver. The xGESDD driver can be up to 6x times faster when | |
| 262 singular vectors are requested, but is reported to be somewhat less | |
| 10639 | 263 robust on highly ill-conditioned matrices. |
| 264 | |
| 265 ** Configuration pseudo-variables, such as page_screen_output or | |
| 266 confirm_recursive_rmdir (or the above mentioned svd_driver), now | |
| 267 accept a "local" option as second argument, requesting the change | |
|
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268 to be undone when the current function returns: |
| 10639 | 269 |
| 270 function [status, msg] = rm_rf (dir) | |
| 271 confirm_recursive_rmdir (false, "local"); | |
| 272 [status, msg] = rmdir (dir, "s"); | |
| 273 ... | |
| 274 endfunction | |
| 275 | |
| 276 Upon return, confirm_recursive_rmdir will be restored to the value | |
| 277 it had on entry to the function, even if there were subsequent | |
| 278 changes to the variable in function rm_rf or any of the functions | |
| 279 it calls. | |
| 280 | |
| 11111 | 281 ** pkg now accepts a -forge option for downloading and installing |
| 282 packages from Octave Forge automatically. For example, | |
| 10774 | 283 |
| 284 pkg install -forge general | |
| 285 | |
| 11111 | 286 will automatically download the latest release of the general |
| 287 package and attempt to install it. No automatic resolving of | |
| 288 dependencies is provided. Further, | |
| 10639 | 289 |
| 10774 | 290 pkg list -forge |
| 291 | |
| 292 can be used to list all available packages. | |
| 293 | |
| 11111 | 294 ** The internal data representation of structs has been completely |
| 295 rewritten to make certain optimizations feasible. The field data | |
| 296 can now be shared between structs with equal keys but different | |
| 297 dimensions or values, making operations that preserve the fields | |
| 298 faster. Economized storage is now used for scalar structs (just | |
| 299 like most other scalars), making their usage more | |
| 300 memory-efficient. Certain array-like operations on structs | |
| 301 (concatenation, uniform cellfun, num2cell) have gained a | |
| 302 significant speed-up. Additionally, the octave_scalar_map class | |
| 303 now provides a simpler interface to work with scalar structs within | |
| 304 a C++ DLD function. | |
| 10639 | 305 |
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306 ** Two new formats are available for displaying numbers: |
| 11111 | 307 |
| 308 format short eng | |
| 309 format long eng | |
| 310 | |
| 311 Both display numbers in engineering notation, i.e., mantissa + | |
| 312 exponent where the exponent is a multiple of 3. | |
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313 |
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314 ** The following functions are new in Octave 3.4: |
| 10829 | 315 |
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316 accumdim erfcx luupdate ppder rsf2csf |
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317 bitpack fileread merge ppint sizemax |
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318 bitunpack fminbnd nfields ppjumps strread |
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319 blkmm fskipl nth_element pqpnonneg textread |
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320 cbrt ifelse onCleanup randi whitebg |
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321 chop ishermitian pbaspect repelems |
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322 daspect isindex powerset reset |
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323 |
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324 ** Using the image function to view images with external programs such |
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325 as display, xv, and xloadimage is no longer supported. The |
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326 image_viewer function has also been removed. |
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327 |
| 11111 | 328 ** The behavior of struct assignments to non-struct values has been |
| 329 changed. Previously, it was possible to overwrite an arbitrary | |
| 330 value: | |
| 10873 | 331 |
| 332 a = 1; | |
| 333 a.x = 2; | |
| 334 | |
| 11111 | 335 This is no longer possible unless a is an empty matrix or cell |
| 336 array. | |
| 10938 | 337 |
| 11111 | 338 ** The dlmread function has been extended to allow specifying a custom |
| 339 value for empty fields. | |
| 10829 | 340 |
| 11111 | 341 ** The dlmread and dlmwrite functions have been modified to accept |
| 342 file IDs (as returned by fopen) in addition to file names. | |
| 343 | |
| 344 ** Octave can now optimize away the interpreter overhead of an | |
| 345 anonymous function handle, if the function simply calls another | |
| 346 function or handle with some of its parameters bound to certain | |
| 347 values. Example: | |
| 10966 | 348 |
| 349 f = @(x) sum (x, 1); | |
| 350 | |
| 11111 | 351 When f is called, the call is forwarded to @sum with the constant 1 |
| 352 appended, and the anonymous function call does not occur on the | |
| 353 call stack. | |
| 10829 | 354 |
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355 ** Deprecated functions. |
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356 |
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357 The following functions were deprecated in Octave 3.0 and have been |
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358 removed from Octave 3.4. |
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359 |
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360 beta_cdf geometric_pdf pascal_pdf |
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361 beta_inv geometric_rnd pascal_rnd |
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362 beta_pdf hypergeometric_cdf poisson_cdf |
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363 beta_rnd hypergeometric_inv poisson_inv |
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364 binomial_cdf hypergeometric_pdf poisson_pdf |
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365 binomial_inv hypergeometric_rnd poisson_rnd |
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366 binomial_pdf intersection polyinteg |
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367 binomial_rnd is_bool setstr |
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368 chisquare_cdf is_complex struct_contains |
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369 chisquare_inv is_list struct_elements |
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370 chisquare_pdf is_matrix t_cdf |
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371 chisquare_rnd is_scalar t_inv |
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372 clearplot is_square t_pdf |
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373 clg is_stream t_rnd |
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374 com2str is_struct uniform_cdf |
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375 exponential_cdf is_symmetric uniform_inv |
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376 exponential_inv is_vector uniform_pdf |
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377 exponential_pdf isstr uniform_rnd |
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378 exponential_rnd lognormal_cdf weibcdf |
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379 f_cdf lognormal_inv weibinv |
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380 f_inv lognormal_pdf weibpdf |
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381 f_pdf lognormal_rnd weibrnd |
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382 f_rnd meshdom weibull_cdf |
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383 gamma_cdf normal_cdf weibull_inv |
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384 gamma_inv normal_inv weibull_pdf |
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385 gamma_pdf normal_pdf weibull_rnd |
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386 gamma_rnd normal_rnd wiener_rnd |
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387 geometric_cdf pascal_cdf |
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388 geometric_inv pascal_inv |
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389 |
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390 The following functions were deprecated in Octave 3.2 and will |
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391 be removed from Octave 3.6 (or whatever version is the second major |
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392 release after 3.2): |
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393 |
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394 create_set spcholinv spmax |
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395 dmult spcumprod spmin |
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396 iscommand spcumsum spprod |
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397 israwcommand spdet spqr |
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398 lchol spdiag spsum |
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399 loadimage spfind spsumsq |
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400 mark_as_command spinv str2mat |
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401 mark_as_rawcommand spkron unmark_command |
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402 spatan2 splchol unmark_rawcommand |
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403 spchol split |
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404 spchol2inv splu |
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405 |
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406 The following functions have been deprecated in Octave 3.4 and will |
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407 be removed from Octave 3.8 (or whatever version is the second major |
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408 release after 3.4): |
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409 |
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410 cellidx fstat values gammai |
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411 betai is_global |
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412 |
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413 Summary of important user-visible changes for version 3.2: |
| 5913 | 414 --------------------------------------------------------- |
| 2452 | 415 |
| 8737 | 416 ** Compatibility with Matlab graphics has been improved. |
| 6329 | 417 |
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418 The hggroup object and associated listener callback functions have |
| 8737 | 419 been added allowing the inclusion of group objects. Data sources |
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420 have been added to these group objects such that |
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421 |
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422 x = 0:0.1:10; |
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423 y = sin (x); |
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424 plot (x, y, "ydatasource", "y"); |
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425 for i = 1 : 100 |
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426 pause(0.1) |
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427 y = sin (x + 0.1 * i); |
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428 refreshdata(); |
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429 endfor |
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430 |
| 8737 | 431 works as expected. This capability has be used to introduce |
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432 stem-series, bar-series, etc., objects for better Matlab |
| 8737 | 433 compatibility. |
| 434 | |
| 435 ** New graphics functions: | |
| 436 | |
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437 addlistener ezcontour gcbo refresh |
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438 addproperty ezcontourf ginput refreshdata |
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439 allchild ezmesh gtext specular |
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440 available_backends ezmeshc intwarning surfl |
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441 backend ezplot ishghandle trisurf |
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442 cla ezplot3 isocolors waitforbuttonpress |
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443 clabel ezpolar isonormals |
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444 comet ezsurf isosurface |
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445 dellistener findall linkprop |
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446 diffuse gcbf plotmatrix |
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447 |
| 8737 | 448 ** New experimental OpenGL/FLTK based plotting system. |
| 449 | |
| 450 An experimental plotting system based on OpenGL and the FLTK | |
| 451 toolkit is now part of Octave. This backend is disabled by | |
| 452 default. You can switch to using it with the command | |
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453 |
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454 backend ("fltk") |
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455 |
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456 for all future figures or for a particular figure with the command |
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457 |
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458 backend (h, "fltk") |
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459 |
| 11139 | 460 where "h" is a valid figure handle. |
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461 |
| 8737 | 462 ** Functions providing direct access to gnuplot have been removed. |
| 463 | |
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464 The functions __gnuplot_plot__, __gnuplot_set__, __gnuplot_raw__, |
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465 __gnuplot_show__, __gnuplot_replot__, __gnuplot_splot__, |
| 8737 | 466 __gnuplot_save_data__ and __gnuplot_send_inline_data__ have been |
| 467 removed from Octave. These function were incompatible with the | |
| 468 high level graphics handle code. | |
| 6329 | 469 |
| 8885 | 470 ** The Control, Finance and Quaternion functions have been removed. |
| 471 | |
| 472 These functions are now available as separate packages from | |
| 473 | |
| 474 http://octave.sourceforge.net/packages.html | |
| 475 | |
| 476 and can be reinstalled using the Octave package manager (see | |
| 477 the pkg function). | |
| 478 | |
| 479 ** Specific sparse matrix functions removed. | |
| 480 | |
| 481 The following functions, which handled only sparse matrices have | |
| 482 been removed. Instead of calling these functions directly, you | |
| 483 should use the corresponding function without the "sp" prefix. | |
| 8737 | 484 |
| 8885 | 485 spatan2 spcumsum spkron spprod |
| 486 spchol spdet splchol spqr | |
| 487 spchol2inv spdiag splu spsum | |
| 488 spcholinv spfind spmax spsumsqk | |
| 489 spcumprod spinv spmin | |
| 490 | |
| 491 ** Improvements to the debugger. | |
| 492 | |
| 493 The interactive debugging features have been improved. Stopping | |
| 494 on statements with dbstop should work correctly now. Stepping | |
| 495 into and over functions, and stepping one statement at a time | |
| 496 (with dbstep) now works. Moving up and down the call stack with | |
| 497 dbup and dbdown now works. The dbstack function is now available | |
| 498 to print the current function call stack. The new dbquit function | |
| 499 is available to exit the debugging mode. | |
| 500 | |
| 501 ** Improved traceback error messages. | |
| 502 | |
| 503 Traceback error messages are much more concise and easier to | |
| 504 understand. They now display information about the function call | |
| 505 stack instead of the stack of all statements that were active at | |
| 506 the point of the error. | |
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507 |
| 8737 | 508 ** Object Oriented Programming. |
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509 |
| 8737 | 510 Octave now includes OOP features and the user can create their own |
| 511 class objects and overloaded functions and operators. For | |
| 512 example, all methods of a class called "myclass" will be found in | |
| 513 a directory "@myclass" on the users path. The class specific | |
| 514 versions of functions and operators take precedence over the | |
| 515 generic versions of these functions. | |
| 516 | |
| 517 New functions related to OOP include | |
| 7189 | 518 |
| 8737 | 519 class inferiorto isobject loadobj methods superiorto |
| 520 | |
| 521 See the Octave manual for more details. | |
| 7038 | 522 |
| 8747 | 523 ** Parsing of Command-style Functions. |
| 524 | |
| 525 Octave now parses command-style functions without needing to first | |
| 526 declare them with "mark_as_command". The rules for recognizing a | |
| 527 command-style function calls are | |
| 528 | |
| 529 * A command must appear as the first word in a statement, | |
| 530 followed by a space. | |
| 531 | |
| 532 * The first character after the space must not be '=' or '(' | |
| 533 | |
| 534 * The next token after the space must not look like a binary | |
| 535 operator. | |
| 536 | |
| 537 These rules should be mostly compatible with the way Matlab parses | |
| 538 command-style function calls and allow users to define commands in | |
| 539 .m files without having to mark them as commands. | |
| 540 | |
| 541 Note that previous versions of Octave allowed expressions like | |
| 542 | |
| 543 x = load -text foo.dat | |
| 544 | |
| 545 but an expression like this will now generate a parse error. In | |
| 546 order to assign the value returned by a function to a variable, | |
| 547 you must use the normal function call syntax: | |
| 548 | |
| 549 x = load ("-text", "foo.dat"); | |
| 550 | |
| 8737 | 551 ** Block comments. |
| 552 | |
| 8747 | 553 Commented code can be between matching "#{" and "#}" or "%{" and |
| 554 "%}" markers, even if the commented code spans several line. This | |
| 555 allows blocks code to be commented, without needing to comment | |
| 556 each line. For example, | |
| 5814 | 557 |
| 8747 | 558 function [s, t] = func (x, y) |
| 559 s = 2 * x; | |
| 560 #{ | |
| 561 s *= y; | |
| 562 t = y + x; | |
| 563 #} | |
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564 endfunction |
| 5814 | 565 |
| 8747 | 566 the lines "s *= y;" and "t = y + x" will not be executed. |
| 8737 | 567 |
| 568 ** Special treatment in the parser of expressions like "a' * b". | |
| 2452 | 569 |
| 8737 | 570 In these cases the transpose is no longer explicitly formed and |
| 571 BLAS libraries are called with the transpose flagged, | |
| 572 significantly improving performance for these kinds of | |
| 573 operations. | |
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574 |
| 8737 | 575 ** Single Precision data type. |
| 2452 | 576 |
| 8737 | 577 Octave now includes a single precision data type. Single |
| 578 precision variables can be created with the "single" command, or | |
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579 from functions like ones, eye, etc. For example, |
| 5995 | 580 |
| 8737 | 581 single (1) |
| 582 ones (2, 2, "single") | |
| 583 zeros (2, 2, "single") | |
| 584 eye (2, 2, "single") | |
| 585 Inf (2, 2, "single") | |
| 586 NaN (2, 2, "single") | |
| 587 NA (2, 2, "single") | |
| 7279 | 588 |
| 8737 | 589 all create single precision variables. For compatibility with |
| 590 Matlab, mixed double/single precision operators and functions | |
| 591 return single precision types. | |
| 592 | |
| 593 As a consequence of this addition to Octave the internal | |
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594 representation of the double precision NA value has changed, and |
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595 so users that make use of data generated by Octave with R or |
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596 visa-versa are warned that compatibility might not be assured. |
| 7279 | 597 |
| 8737 | 598 ** Improved array indexing. |
| 599 | |
| 600 The underlying code used for indexing of arrays has been | |
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601 completely rewritten and indexing is now significantly faster. |
| 8737 | 602 |
| 8755 | 603 ** Improved memory management. |
| 604 | |
| 605 Octave will now attempt to share data in some cases where previously | |
| 606 a copy would be made, such as certain array slicing operations or | |
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607 conversions between cells, structs and cs-lists. This usually reduces |
| 8755 | 608 both time and memory consumption. |
| 9128 | 609 Also, Octave will now attempt to detect and optimize usage of a vector |
| 610 as a stack, when elements are being repeatedly inserted at/removed from | |
| 611 the end of the vector. | |
| 8755 | 612 |
| 8738 | 613 ** Improved performance for reduction operations. |
| 614 | |
| 8755 | 615 The performance of the sum, prod, sumsq, cumsum, cumprod, any, all, |
| 616 max and min functions has been significantly improved. | |
| 8738 | 617 |
| 9006 | 618 ** Sorting and searching. |
| 619 | |
| 620 The performance of sort has been improved, especially when sorting | |
| 10453 | 621 indices are requested. An efficient built-in issorted |
| 622 implementation was added. The sortrows function now uses a more | |
| 623 efficient algorithm, especially in the homegeneous case. The lookup | |
| 624 function is now a built-in function performing a binary search, | |
| 625 optimized for long runs of close elements. Lookup also works with | |
| 626 cell arrays of strings. | |
| 9006 | 627 |
| 628 ** Range arithmetics | |
| 629 | |
| 10453 | 630 For some operations on ranges, Octave will attempt to keep the |
| 631 result as a range. These include negation, adding a scalar, | |
| 632 subtracting a scalar, and multiplying by a scalar. Ranges with zero | |
| 633 increment are allowed and can be constructed using the built-in | |
| 634 function `ones'. | |
| 9006 | 635 |
| 636 ** Various performance improvements. | |
| 637 | |
| 10453 | 638 Performance of a number of other built-in operations and functions |
| 639 was improved, including: | |
| 9006 | 640 |
| 641 * logical operations | |
| 642 * comparison operators | |
| 643 * element-wise power | |
| 644 * accumarray | |
| 645 * cellfun | |
| 646 * isnan | |
| 647 * isinf | |
| 648 * isfinite | |
| 649 * nchoosek | |
| 650 * repmat | |
| 651 * strcmp | |
| 652 | |
| 8737 | 653 ** 64-bit integer arithmetic. |
| 654 | |
| 655 Arithmetic with 64-bit integers (int64 and uint64 types) is fully | |
| 656 supported, with saturation semantics like the other integer types. | |
| 657 Performance of most integer arithmetic operations has been | |
| 658 improved by using integer arithmetic directly. Previously, Octave | |
| 659 performed integer math with saturation semantics by converting the | |
| 660 operands to double precision, performing the operation, and then | |
| 661 converting the result back to an integer value, truncating if | |
| 662 necessary. | |
| 663 | |
| 8885 | 664 ** Diagonal and permutation matrices. |
| 665 | |
| 666 The interpreter can now treat diagonal and permutation matrices as | |
| 667 special objects that store only the non-zero elements, rather than | |
| 668 general full matrices. Therefore, it is now possible to construct | |
| 669 and use these matrices in linear algebra without suffering a | |
| 670 performance penalty due to storing large numbers of zero elements. | |
| 671 | |
| 672 ** Improvements to fsolve. | |
| 673 | |
| 674 The fsolve function now accepts an option structure argument (see | |
| 675 also the optimset function). The INFO values returned from fsolve | |
| 676 have changed to be compatible with Matlab's fsolve function. | |
| 677 Additionally, fsolve is now able to solve overdetermined systems, | |
| 678 complex-differentiable complex systems, systems with a sparse | |
| 679 jacobian and can work in single precision if given single precision | |
|
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680 inputs. It can also be called recursively. |
| 8885 | 681 |
| 8737 | 682 ** Improvements to the norm function. |
| 683 | |
| 684 The norm function is now able to compute row or column norms of a | |
| 685 matrix in a single call, as well as general matrix p-norms. | |
| 686 | |
| 687 ** New functions for computing some eigenvalues or singular values. | |
| 688 | |
| 689 The eigs and svds functions have been included in Octave. These | |
| 690 functions require the ARPACK library (now distributed under a | |
| 691 GPL-compatible license). | |
| 692 | |
| 693 ** New QR and Cholesky factorization updating functions. | |
|
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|
694 |
| 8737 | 695 choldelete cholshift qrdelete qrshift |
| 696 cholinsert cholupdate qrinsert qrupdate | |
| 697 | |
| 698 ** New quadrature functions. | |
| 699 | |
| 700 dblquad quadgk quadv triplequad | |
| 701 | |
| 8885 | 702 ** New functions for reading and writing images. |
| 703 | |
| 704 The imwrite and imread functions have been included in Octave. | |
| 705 These functions require the GraphicsMagick library. The new | |
| 706 function imfinfo provides information about an image file (size, | |
| 707 type, colors, etc.) | |
| 708 | |
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709 ** The input_event_hook function has been replaced by the pair of |
|
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710 functions add_input_event_hook and remove_input_event_hook so that |
|
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711 more than one hook function may be installed at a time. |
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712 |
| 8737 | 713 ** Other miscellaneous new functions. |
|
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714 |
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715 addtodate hypot reallog |
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716 bicgstab idivide realpow |
| 9006 | 717 cellslices info realsqrt |
| 718 cgs interp1q rectint | |
| 719 command_line_path isdebugmode regexptranslate | |
| 720 contrast isfloat restoredefaultpath | |
| 721 convn isstrprop roundb | |
| 722 cummin log1p rundemos | |
| 723 cummax lsqnonneg runlength | |
| 724 datetick matlabroot saveobj | |
| 725 display namelengthmax spaugment | |
| 726 expm1 nargoutchk strchr | |
| 727 filemarker pathdef strvcat | |
| 728 fstat perl subspace | |
| 729 full prctile symvar | |
| 730 fzero quantile treelayout | |
| 731 genvarname re_read_readline_init_file validatestring | |
| 732 histc | |
|
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|
733 |
| 8885 | 734 ** Changes to strcat. |
| 735 | |
| 736 The strcat function is now compatible with Matlab's strcat | |
| 737 function, which removes trailing whitespace when concatenating | |
| 738 character strings. For example | |
| 739 | |
| 740 strcat ('foo ', 'bar') | |
| 741 ==> 'foobar' | |
| 742 | |
| 743 The new function cstrcat provides the previous behavior of | |
| 744 Octave's strcat. | |
| 745 | |
| 746 ** Improvements to the help functions. | |
| 747 | |
|
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748 The help system has been mostly re-implemented in .m files to make |
| 8885 | 749 it easier to modify. Performance of the lookfor function has been |
| 750 greatly improved by caching the help text from all functions that | |
| 751 are distributed with Octave. The pkg function has been modified | |
| 752 to generate cache files for external packages when they are | |
| 753 installed. | |
| 754 | |
|
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755 ** Deprecated functions. |
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756 |
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757 The following functions were deprecated in Octave 3.0 and will be |
|
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758 removed from Octave 3.4 (or whatever version is the second major |
|
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759 release after 3.0): |
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760 |
|
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761 beta_cdf geometric_pdf pascal_pdf |
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762 beta_inv geometric_rnd pascal_rnd |
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763 beta_pdf hypergeometric_cdf poisson_cdf |
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764 beta_rnd hypergeometric_inv poisson_inv |
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765 binomial_cdf hypergeometric_pdf poisson_pdf |
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|
766 binomial_inv hypergeometric_rnd poisson_rnd |
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767 binomial_pdf intersection polyinteg |
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768 binomial_rnd is_bool setstr |
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|
769 chisquare_cdf is_complex struct_contains |
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|
770 chisquare_inv is_list struct_elements |
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771 chisquare_pdf is_matrix t_cdf |
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772 chisquare_rnd is_scalar t_inv |
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773 clearplot is_square t_pdf |
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774 clg is_stream t_rnd |
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775 com2str is_struct uniform_cdf |
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776 exponential_cdf is_symmetric uniform_inv |
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777 exponential_inv is_vector uniform_pdf |
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778 exponential_pdf isstr uniform_rnd |
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779 exponential_rnd lognormal_cdf weibcdf |
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780 f_cdf lognormal_inv weibinv |
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781 f_inv lognormal_pdf weibpdf |
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782 f_pdf lognormal_rnd weibrnd |
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783 f_rnd meshdom weibull_cdf |
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784 gamma_cdf normal_cdf weibull_inv |
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785 gamma_inv normal_inv weibull_pdf |
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786 gamma_pdf normal_pdf weibull_rnd |
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|
787 gamma_rnd normal_rnd wiener_rnd |
|
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788 geometric_cdf pascal_cdf |
|
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789 geometric_inv pascal_inv |
|
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790 |
|
0c7b0049c023
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791 The following functions are now deprecated in Octave 3.2 and will |
|
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792 be removed from Octave 3.6 (or whatever version is the second major |
|
8888
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|
793 release after 3.2): |
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794 |
|
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|
795 create_set spcholinv spmax |
|
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796 dmult spcumprod spmin |
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797 iscommand spcumsum spprod |
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798 israwcommand spdet spqr |
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799 lchol spdiag spsum |
|
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800 loadimage spfind spsumsq |
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801 mark_as_command spinv str2mat |
|
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802 mark_as_rawcommand spkron unmark_command |
|
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803 spatan2 splchol unmark_rawcommand |
|
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804 spchol split |
|
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805 spchol2inv splu |
|
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|
806 |
|
7990
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|
807 See NEWS.3 for old news. |