Mercurial > hg > octave-max
annotate NEWS @ 12712:89638f2b844a stable
maint: update NEWS
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Mon, 06 Jun 2011 15:46:22 -0400 |
| parents | 96180026afc5 |
| children | 8176c16628c8 |
| 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 |
| 12712 | 21 * Octave's libraries and .oct files are now installed in |
| 22 subdirectories of $libdir instead of $libexecdir. | |
| 23 | |
| 12709 | 24 Any future Octave 3.4.x release versions should remain binary |
| 25 compatible with Octave 3.4.1 as we are now using proper library | |
| 26 versioning as recommended by the libtool manual. | |
| 27 | |
| 28 ** The following functions have been deprecated in Octave 3.4.1 and will | |
| 29 be removed from Octave 3.8 (or whatever version is the second major | |
| 30 release after 3.4): | |
| 31 | |
| 32 cquad is_duplicate_entry perror strerror | |
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33 |
| 12709 | 34 ** The following functions are new in 3.4.1: |
| 35 | |
| 36 colstyle iscolumn isrow | |
| 37 | |
| 38 ** The get_forge_pkg function is now private. | |
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39 |
| 12709 | 40 ** The rectangle_lw, rectangle_sw, triangle_lw, and triangle_sw |
| 41 functions are now private. | |
| 42 | |
| 43 ** The logistic_regression_derivatives and logistic_regression_likelihood | |
| 44 functions are now private. | |
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45 |
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46 Summary of important user-visible changes for version 3.4: |
| 9352 | 47 --------------------------------------------------------- |
| 48 | |
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49 ** BLAS and LAPACK libraries are now required to build Octave. The |
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50 subset of the reference BLAS and LAPACK libraries has been removed |
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51 from the Octave sources. |
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52 |
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53 ** The ARPACK library is now distributed with Octave so it no longer |
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54 needs to be available as an external dependency when building |
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55 Octave. |
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56 |
| 10118 | 57 ** The `lookup' function was extended to be more useful for |
| 58 general-purpose binary searching. Using this improvement, the | |
| 59 ismember function was rewritten for significantly better | |
| 60 performance. | |
| 9352 | 61 |
| 62 ** Real, integer and logical matrices, when used in indexing, will now | |
| 63 cache the internal index_vector value (zero-based indices) when | |
| 64 successfully used as indices, eliminating the conversion penalty for | |
| 10118 | 65 subsequent indexing by the same matrix. In particular, this means it |
| 66 is no longer needed to avoid repeated indexing by logical arrays | |
| 67 using find for performance reasons. | |
| 9888 | 68 |
| 10118 | 69 ** Logical matrices are now treated more efficiently when used as |
| 70 indices. Octave will keep the index as a logical mask unless the | |
| 71 ratio of true elements is small enough, using a specialized | |
| 72 code. Previously, all logical matrices were always first converted | |
| 73 to index vectors. This results in savings in both memory and | |
| 74 computing time. | |
| 9480 | 75 |
| 10118 | 76 ** The `sub2ind' and `ind2sub' functions were reimplemented as compiled |
| 77 functions for better performance. These functions are now faster, | |
| 78 can deliver more economized results for ranges, and can reuse the | |
| 79 index cache mechanism described in previous paragraph. | |
| 80 | |
| 81 ** The built-in function equivalents to associative operators (`plus', | |
| 82 `times', `mtimes', `and', and `or') have been extended to accept | |
| 83 multiple arguments. This is especially useful for summing | |
| 84 (multiplying, etc.) lists of objects (of possibly distinct types): | |
| 9408 | 85 |
| 9449 | 86 matrix_sum = plus (matrix_list{:}); |
| 87 | |
| 10118 | 88 ** An FTP object type based on libcurl has been implemented. These |
| 89 objects allow ftp connections, downloads and uploads to be | |
| 90 managed. For example, | |
| 9880 | 91 |
| 10118 | 92 fp = ftp ("ftp.octave.org); |
| 93 cd (fp, "gnu/octave"); | |
| 94 mget (fp, "octave-3.2.3.tar.bz2"); | |
| 95 close (fp); | |
| 9880 | 96 |
| 10118 | 97 ** The default behavior of `assert (observed, expected)' has been |
| 98 relaxed to employ less strict checking that does not require the | |
| 99 internals of the values to match. This avoids previously valid | |
| 100 tests from breaking due to new internal classes introduced in future | |
| 101 Octave versions. | |
| 9449 | 102 |
| 103 For instance, all of these assertions were true in Octave 3.0.x | |
| 104 but false in 3.2.x due to new optimizations and improvements: | |
| 105 | |
| 106 assert (2*linspace (1, 5, 5), 2*(1:5)) | |
| 107 assert (zeros (0, 0), []) | |
| 108 assert (2*ones (1, 5), (2) (ones (1,5))) | |
| 9462 | 109 |
| 10118 | 110 ** The behavior of library functions `ismatrix', `issquare', and |
| 111 `issymmetric' has been changed for better consistency. | |
| 9873 | 112 |
| 10292 | 113 * The `ismatrix' function now returns true for all numeric, |
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114 logical and character 2-D or N-D matrices. Previously, `ismatrix' |
| 10292 | 115 returned false if the first or second dimension was zero. |
| 116 Hence, `ismatrix ([])' was false, | |
| 117 while `ismatrix (zeros (1,2,0))' was true. | |
| 9873 | 118 |
| 10118 | 119 * The `issquare' function now returns a logical scalar, and is |
| 120 equivalent to the expression | |
| 121 | |
| 122 ismatrix (x) && ndims (x) == 2 && rows (x) == columns (x) | |
| 123 | |
| 124 The dimension is no longer returned. As a result, `issquare ([])' | |
| 125 now yields true. | |
| 9873 | 126 |
| 10118 | 127 * The `issymmetric' function now checks for symmetry instead of |
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128 Hermitianness. For the latter, ishermitian was created. Also, |
| 10118 | 129 logical scalar is returned rather than the dimension, so |
| 130 `issymmetric ([])' is now true. | |
| 9873 | 131 |
| 10118 | 132 ** Function handles are now aware of overloaded functions. If a |
| 133 function is overloaded, the handle determines at the time of its | |
| 134 reference which function to call. A non-overloaded version does not | |
| 135 need to exist. | |
| 9873 | 136 |
| 10118 | 137 ** Overloading functions for built-in classes (double, int8, cell, |
| 138 etc.) is now compatible with Matlab. | |
| 9408 | 139 |
| 10323 | 140 ** Function handles can now be compared with the == and != operators, |
| 141 as well as the `isequal' function. | |
| 142 | |
| 10118 | 143 ** Performance of concatenation (using []) and the functions `cat', |
| 144 `horzcat', and `vertcat' has been improved for multidimensional | |
| 145 arrays. | |
| 10117 | 146 |
| 9547 | 147 ** The operation-assignment operators +=, -=, *= and /= now behave more |
| 10118 | 148 efficiently in certain cases. For instance, if M is a matrix and S a |
| 149 scalar, then the statement | |
| 9547 | 150 |
| 10118 | 151 M += S; |
| 9547 | 152 |
| 10118 | 153 will operate on M's data in-place if it is not shared by another |
| 154 variable, usually increasing both time and memory efficiency. | |
| 9547 | 155 |
| 9558 | 156 Only selected common combinations are affected, namely: |
| 9547 | 157 |
| 158 matrix += matrix | |
| 159 matrix -= matrix | |
| 9558 | 160 matrix .*= matrix |
| 161 matrix ./= matrix | |
| 162 | |
| 9547 | 163 matrix += scalar |
| 164 matrix -= scalar | |
| 165 matrix *= scalar | |
| 166 matrix /= scalar | |
| 9558 | 167 |
| 9552 | 168 logical matrix |= logical matrix |
| 169 logical matrix &= logical matrix | |
| 9547 | 170 |
| 10118 | 171 where matrix and scalar belong to the same class. The left-hand |
| 172 side must be a simple variable reference. | |
| 9888 | 173 |
| 10118 | 174 Moreover, when unary operators occur in expressions, Octave will |
| 175 also try to do the operation in-place if it's argument is a | |
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176 temporary expression. |
| 9589 | 177 |
| 10118 | 178 ** The effect of comparison operators (<, >, <=, and >=) applied to |
| 179 complex numbers has changed to be consistent with the strict | |
| 180 ordering defined by the `max', `min', and `sort' functions. More | |
| 181 specifically, complex numbers are compared by lexicographical | |
| 182 comparison of the pairs `[abs(z), arg(z)]'. Previously, only real | |
| 183 parts were compared; this can be trivially achieved by wrapping the | |
| 184 operands in real(). | |
| 9547 | 185 |
| 10118 | 186 ** The automatic simplification of complex computation results has |
| 187 changed. Octave will now simplify any complex number with a zero | |
| 188 imaginary part or any complex matrix with all elements having zero | |
| 189 imaginary part to a real value. Previously, this was done only for | |
| 190 positive zeros. Note that the behavior of the complex function is | |
| 191 unchanged and it still produces a complex value even if the | |
| 192 imaginary part is zero. | |
| 9826 | 193 |
| 10118 | 194 ** As a side effect of code refactoring in liboctave, the binary |
| 195 logical operations are now more easily amenable to compiler | |
| 196 optimizations and are thus significantly faster. | |
| 9595 | 197 |
| 10118 | 198 ** Octave now allows user-defined `subsasgn' methods to optimize out |
| 199 redundant copies. For more information, see the manual. | |
| 9595 | 200 |
| 10453 | 201 ** More efficient matrix division handling. Octave is now able to |
| 10118 | 202 handle the expressions |
| 9664 | 203 |
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204 M' \ V |
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205 M.' \ V |
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206 V / M |
| 9664 | 207 |
| 10118 | 208 (M is a matrix and V is a vector) more efficiently in certain cases. |
| 209 In particular, if M is triangular, all three expressions will be | |
| 210 handled by a single call to xTRTRS (from LAPACK), with appropriate | |
| 10453 | 211 flags. Previously, all three expressions required a physical |
| 10118 | 212 transpose of M. |
| 9664 | 213 |
| 10118 | 214 ** More efficient handling of certain mixed real-complex matrix |
| 215 operations. For instance, if RM is a real matrix and CM a complex | |
| 216 matrix, | |
| 9664 | 217 |
| 10118 | 218 RM * CM |
| 9664 | 219 |
| 220 can now be evaluated either as | |
| 221 | |
| 222 complex (RM * real (CM), RM * imag (CM)) | |
| 223 | |
| 224 or as | |
| 225 | |
| 226 complex (RM) * CM, | |
| 227 | |
| 10453 | 228 depending on the dimensions. The first form requires more |
| 229 temporaries and copying, but halves the FLOP count, which normally | |
| 230 brings better performance if RM has enough rows. Previously, the | |
| 231 second form was always used. | |
| 9664 | 232 |
| 11111 | 233 Matrix division is similarly affected. |
| 9664 | 234 |
| 10118 | 235 ** More efficient handling of triangular matrix factors returned from |
| 236 factorizations. The functions for computing QR, LU and Cholesky | |
| 237 factorizations will now automatically return the triangular matrix | |
| 238 factors with proper internal matrix_type set, so that it won't need | |
| 239 to be computed when the matrix is used for division. | |
| 9717 | 240 |
| 10118 | 241 ** The built-in `sum' function now handles the non-native summation |
| 242 (i.e., double precision sum of single or integer inputs) more | |
| 243 efficiently, avoiding a temporary conversion of the whole input | |
| 244 array to doubles. Further, `sum' can now accept an extra option | |
| 245 argument, using a compensated summation algorithm rather than a | |
| 246 straightforward sum, which significantly improves precision if lots | |
| 247 of cancellation occurs in the summation. | |
| 9717 | 248 |
| 10118 | 249 ** The built-in `bsxfun' function now uses optimized code for certain |
| 250 cases where built-in operator handles are passed in. Namely, the | |
| 251 optimizations concern the operators `plus', `minus', `times', | |
| 252 `ldivide', `rdivide', `power', `and', `or' (for logical arrays), | |
| 253 the relational operators `eq', `ne', `lt', `le', `gt', `ge', and the | |
| 254 functions `min' and `max'. Optimizations only apply when both | |
| 255 operands are of the same built-in class. Mixed real/complex and | |
| 256 single/double operations will first convert both operands to a | |
| 257 common type. | |
| 9745 | 258 |
| 10118 | 259 ** The `strfind' and `strrep' functions now have compiled |
| 260 implementations, facilitating significantly more efficient searching | |
| 261 and replacing in strings, especially with longer patterns. The code | |
| 262 of `strcat' has been vectorized and is now much more efficient when | |
| 263 many strings are concatenated. The `strcmpi' and `strncmpi' | |
| 264 functions are now built-in functions, providing better performance. | |
| 10208 | 265 |
| 10453 | 266 ** Matlab-style ignoring input and output function arguments using |
| 11111 | 267 tilde (~) is now supported. Ignored output arguments may be |
| 268 detected from a function using the built-in function `isargout'. | |
| 269 For more details, consult the manual. | |
| 10886 | 270 |
| 10453 | 271 ** The list datatype, deprecated since the introduction of cells, has |
| 272 been removed. | |
| 10276 | 273 |
| 10453 | 274 ** The accumarray function has been optimized and is now significantly |
| 275 faster in certain important cases. | |
| 10054 | 276 |
| 10292 | 277 ** The behavior of isreal and isnumeric functions was changed to be more |
| 278 Matlab-compatible. | |
| 279 | |
| 10406 | 280 ** The integer math & conversion warnings (Octave:int-convert-nan, |
| 281 Octave:int-convert-non-int-val, Octave:int-convert-overflow, | |
| 11111 | 282 Octave:int-math-overflow) have been removed. |
| 10406 | 283 |
| 10453 | 284 ** rem and mod are now built-in functions. They also handle integer |
| 285 types efficiently using integer arithmetic. | |
| 10437 | 286 |
| 10536 | 287 ** Sparse indexing and indexed assignment has been mostly rewritten. |
| 288 Since Octave uses compressed column storage for sparse matrices, | |
| 289 major attention is devoted to operations manipulating whole columns. | |
| 290 Such operations are now significantly faster, as well as some other | |
| 291 important cases. | |
| 292 | |
| 293 Further, it is now possible to pre-allocate a sparse matrix and | |
| 294 subsequently fill it by assignments, provided they meet certain | |
| 295 conditions. For more information, consult the `spalloc' function, | |
| 296 which is no longer a mere dummy. Consequently, nzmax and nnz are no | |
| 11111 | 297 longer always equal in Octave. Octave may also produce a matrix |
| 298 with nnz < nzmax as a result of other operations, so you should | |
| 299 consistently use nnz unless you really want to use nzmax (i.e. the | |
| 300 space allocated for nonzero elements). | |
| 10536 | 301 |
| 302 Sparse concatenation is also affected, and concatenating sparse | |
| 303 matrices, especially larger collections, is now significantly more | |
| 11111 | 304 efficient. This applies to both the [] operator and the |
| 10536 | 305 cat/vertcat/horzcat functions. |
| 306 | |
| 11111 | 307 ** It is now possible to optionally employ the xGESDD LAPACK drivers |
| 308 for computing the singular value decomposition using svd(), instead | |
| 309 of the default xGESVD, using the configuration pseudo-variable | |
| 310 svd_driver. The xGESDD driver can be up to 6x times faster when | |
| 311 singular vectors are requested, but is reported to be somewhat less | |
| 10639 | 312 robust on highly ill-conditioned matrices. |
| 313 | |
| 314 ** Configuration pseudo-variables, such as page_screen_output or | |
| 315 confirm_recursive_rmdir (or the above mentioned svd_driver), now | |
| 316 accept a "local" option as second argument, requesting the change | |
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317 to be undone when the current function returns: |
| 10639 | 318 |
| 319 function [status, msg] = rm_rf (dir) | |
| 320 confirm_recursive_rmdir (false, "local"); | |
| 321 [status, msg] = rmdir (dir, "s"); | |
| 322 ... | |
| 323 endfunction | |
| 324 | |
| 325 Upon return, confirm_recursive_rmdir will be restored to the value | |
| 326 it had on entry to the function, even if there were subsequent | |
| 327 changes to the variable in function rm_rf or any of the functions | |
| 328 it calls. | |
| 329 | |
| 11111 | 330 ** pkg now accepts a -forge option for downloading and installing |
| 331 packages from Octave Forge automatically. For example, | |
| 10774 | 332 |
| 333 pkg install -forge general | |
| 334 | |
| 11111 | 335 will automatically download the latest release of the general |
| 336 package and attempt to install it. No automatic resolving of | |
| 337 dependencies is provided. Further, | |
| 10639 | 338 |
| 10774 | 339 pkg list -forge |
| 340 | |
| 341 can be used to list all available packages. | |
| 342 | |
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343 ** The internal data representation of structs has been completely |
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344 rewritten to make certain optimizations feasible. The field data |
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345 can now be shared between structs with equal keys but different |
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346 dimensions or values, making operations that preserve the fields |
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347 faster. Economized storage is now used for scalar structs (just |
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348 like most other scalars), making their usage more |
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349 memory-efficient. Certain array-like operations on structs |
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350 (concatenation, uniform cellfun, num2cell) have gained a |
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351 significant speed-up. Additionally, the octave_scalar_map class |
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352 now provides a simpler interface to work with scalar structs within |
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353 a C++ DLD function. |
| 10639 | 354 |
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355 ** Two new formats are available for displaying numbers: |
| 11111 | 356 |
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357 format short eng |
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358 format long eng |
| 11111 | 359 |
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360 Both display numbers in engineering notation, i.e., mantissa + |
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361 exponent where the exponent is a multiple of 3. |
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362 |
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363 ** The following functions are new in Octave 3.4: |
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364 accumdim divergence merge ppjumps strread |
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365 bitpack erfcx nfields pqpnonneg textread |
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366 bitunpack fileread nth_element quadcc uigetdir |
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367 blkmm fminbnd onCleanup randi uigetfile |
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368 cbrt fskipl pbaspect rectangle uiputfile |
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369 curl ifelse pie3 repelems uimenu |
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370 chop ishermitian powerset reset whitebg |
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371 colstyle isindex ppder rsf2csf |
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372 daspect luupdate ppint saveas |
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373 |
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374 ** Using the image function to view images with external programs such |
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375 as display, xv, and xloadimage is no longer supported. The |
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376 image_viewer function has also been removed. |
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377 |
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378 ** The behavior of struct assignments to non-struct values has been |
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379 changed. Previously, it was possible to overwrite an arbitrary |
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380 value: |
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381 |
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382 a = 1; |
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383 a.x = 2; |
| 10873 | 384 |
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385 This is no longer possible unless a is an empty matrix or cell |
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386 array. |
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387 |
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388 ** The dlmread function has been extended to allow specifying a custom |
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389 value for empty fields. |
| 10829 | 390 |
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391 ** The dlmread and dlmwrite functions have been modified to accept |
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392 file IDs (as returned by fopen) in addition to file names. |
| 11111 | 393 |
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394 ** Octave can now optimize away the interpreter overhead of an |
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395 anonymous function handle, if the function simply calls another |
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396 function or handle with some of its parameters bound to certain |
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397 values. Example: |
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398 |
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399 f = @(x) sum (x, 1); |
| 10966 | 400 |
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401 When f is called, the call is forwarded to @sum with the constant 1 |
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402 appended, and the anonymous function call does not occur on the |
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403 call stack. |
| 10829 | 404 |
| 12424 | 405 ** For compatibility with Matlab, mu2lin (x) is now equivalent to |
| 406 mu2lin (x, 0). | |
| 407 | |
| 408 ** The new function `history_control' may be used to control the way | |
| 409 command lines are added to the history list when Octave is using | |
| 410 readline for command-line editing. For example | |
| 411 | |
| 412 history_control ("ignoredups") | |
| 413 | |
| 414 tells Octave to avoid adding duplicate lines to the history list. | |
| 415 | |
| 416 ** Octave now uses the gnulib library for improved portability and to | |
| 417 avoid bugs in operating system functions. | |
| 418 | |
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419 ** Deprecated functions. |
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420 |
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421 The following functions were deprecated in Octave 3.0 and have been |
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422 removed from Octave 3.4. |
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423 |
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424 beta_cdf geometric_pdf pascal_pdf |
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425 beta_inv geometric_rnd pascal_rnd |
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426 beta_pdf hypergeometric_cdf poisson_cdf |
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427 beta_rnd hypergeometric_inv poisson_inv |
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428 binomial_cdf hypergeometric_pdf poisson_pdf |
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429 binomial_inv hypergeometric_rnd poisson_rnd |
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430 binomial_pdf intersection polyinteg |
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431 binomial_rnd is_bool setstr |
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432 chisquare_cdf is_complex struct_contains |
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433 chisquare_inv is_list struct_elements |
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434 chisquare_pdf is_matrix t_cdf |
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435 chisquare_rnd is_scalar t_inv |
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436 clearplot is_square t_pdf |
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437 clg is_stream t_rnd |
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438 com2str is_struct uniform_cdf |
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439 exponential_cdf is_symmetric uniform_inv |
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440 exponential_inv is_vector uniform_pdf |
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441 exponential_pdf isstr uniform_rnd |
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442 exponential_rnd lognormal_cdf weibcdf |
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443 f_cdf lognormal_inv weibinv |
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444 f_inv lognormal_pdf weibpdf |
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445 f_pdf lognormal_rnd weibrnd |
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446 f_rnd meshdom weibull_cdf |
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447 gamma_cdf normal_cdf weibull_inv |
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448 gamma_inv normal_inv weibull_pdf |
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449 gamma_pdf normal_pdf weibull_rnd |
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450 gamma_rnd normal_rnd wiener_rnd |
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451 geometric_cdf pascal_cdf |
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452 geometric_inv pascal_inv |
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453 |
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454 The following functions were deprecated in Octave 3.2 and will |
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455 be removed from Octave 3.6 (or whatever version is the second major |
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456 release after 3.2): |
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457 |
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458 create_set spcholinv splu |
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459 dmult spcumprod spmax |
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460 iscommand spcumsum spmin |
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461 israwcommand spdet spprod |
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462 lchol spdiag spqr |
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463 loadimage spfind spsum |
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464 mark_as_command sphcat spsumsq |
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465 mark_as_rawcommand spinv spvcat |
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466 spatan2 spkron str2mat |
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467 spchol splchol unmark_command |
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468 spchol2inv split unmark_rawcommand |
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469 |
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470 The following functions have been deprecated in Octave 3.4 and will |
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471 be removed from Octave 3.8 (or whatever version is the second major |
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472 release after 3.4): |
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473 |
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474 autocor cellidx fstat is_global replot values |
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475 autocov cquad gammai krylovb saveimage |
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476 betai dispatch glpkmex perror strerror |
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477 |
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478 Summary of important user-visible changes for version 3.2: |
| 5913 | 479 --------------------------------------------------------- |
| 2452 | 480 |
| 8737 | 481 ** Compatibility with Matlab graphics has been improved. |
| 6329 | 482 |
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483 The hggroup object and associated listener callback functions have |
| 8737 | 484 been added allowing the inclusion of group objects. Data sources |
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485 have been added to these group objects such that |
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486 |
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487 x = 0:0.1:10; |
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488 y = sin (x); |
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489 plot (x, y, "ydatasource", "y"); |
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490 for i = 1 : 100 |
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491 pause(0.1) |
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492 y = sin (x + 0.1 * i); |
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493 refreshdata(); |
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494 endfor |
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495 |
| 8737 | 496 works as expected. This capability has be used to introduce |
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497 stem-series, bar-series, etc., objects for better Matlab |
| 8737 | 498 compatibility. |
| 499 | |
| 500 ** New graphics functions: | |
| 501 | |
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502 addlistener ezcontour gcbo refresh |
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503 addproperty ezcontourf ginput refreshdata |
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504 allchild ezmesh gtext specular |
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505 available_graphics_toolkits ezmeshc intwarning surfl |
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506 graphics_toolkit ezplot ishghandle trisurf |
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507 cla ezplot3 isocolors waitforbuttonpress |
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508 clabel ezpolar isonormals |
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509 comet ezsurf isosurface |
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510 dellistener findall linkprop |
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511 diffuse gcbf plotmatrix |
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512 |
| 8737 | 513 ** New experimental OpenGL/FLTK based plotting system. |
| 514 | |
| 515 An experimental plotting system based on OpenGL and the FLTK | |
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516 toolkit is now part of Octave. This graphics toolkit is disabled by |
| 8737 | 517 default. You can switch to using it with the command |
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518 |
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519 graphics_toolkit ("fltk") |
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520 |
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521 for all future figures or for a particular figure with the command |
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522 |
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523 graphics_toolkit (h, "fltk") |
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524 |
| 11139 | 525 where "h" is a valid figure handle. |
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526 |
| 8737 | 527 ** Functions providing direct access to gnuplot have been removed. |
| 528 | |
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529 The functions __gnuplot_plot__, __gnuplot_set__, __gnuplot_raw__, |
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530 __gnuplot_show__, __gnuplot_replot__, __gnuplot_splot__, |
| 8737 | 531 __gnuplot_save_data__ and __gnuplot_send_inline_data__ have been |
| 532 removed from Octave. These function were incompatible with the | |
| 533 high level graphics handle code. | |
| 6329 | 534 |
| 8885 | 535 ** The Control, Finance and Quaternion functions have been removed. |
| 536 | |
| 537 These functions are now available as separate packages from | |
| 538 | |
| 539 http://octave.sourceforge.net/packages.html | |
| 540 | |
| 541 and can be reinstalled using the Octave package manager (see | |
| 542 the pkg function). | |
| 543 | |
| 544 ** Specific sparse matrix functions removed. | |
| 545 | |
| 546 The following functions, which handled only sparse matrices have | |
| 547 been removed. Instead of calling these functions directly, you | |
| 548 should use the corresponding function without the "sp" prefix. | |
| 8737 | 549 |
| 8885 | 550 spatan2 spcumsum spkron spprod |
| 551 spchol spdet splchol spqr | |
| 552 spchol2inv spdiag splu spsum | |
| 553 spcholinv spfind spmax spsumsqk | |
| 554 spcumprod spinv spmin | |
| 555 | |
| 556 ** Improvements to the debugger. | |
| 557 | |
| 558 The interactive debugging features have been improved. Stopping | |
| 559 on statements with dbstop should work correctly now. Stepping | |
| 560 into and over functions, and stepping one statement at a time | |
| 561 (with dbstep) now works. Moving up and down the call stack with | |
| 562 dbup and dbdown now works. The dbstack function is now available | |
| 563 to print the current function call stack. The new dbquit function | |
| 564 is available to exit the debugging mode. | |
| 565 | |
| 566 ** Improved traceback error messages. | |
| 567 | |
| 568 Traceback error messages are much more concise and easier to | |
| 569 understand. They now display information about the function call | |
| 570 stack instead of the stack of all statements that were active at | |
| 571 the point of the error. | |
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572 |
| 8737 | 573 ** Object Oriented Programming. |
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574 |
| 8737 | 575 Octave now includes OOP features and the user can create their own |
| 576 class objects and overloaded functions and operators. For | |
| 577 example, all methods of a class called "myclass" will be found in | |
| 578 a directory "@myclass" on the users path. The class specific | |
| 579 versions of functions and operators take precedence over the | |
| 580 generic versions of these functions. | |
| 581 | |
| 582 New functions related to OOP include | |
| 7189 | 583 |
| 8737 | 584 class inferiorto isobject loadobj methods superiorto |
| 585 | |
| 586 See the Octave manual for more details. | |
| 7038 | 587 |
| 8747 | 588 ** Parsing of Command-style Functions. |
| 589 | |
| 590 Octave now parses command-style functions without needing to first | |
| 591 declare them with "mark_as_command". The rules for recognizing a | |
| 592 command-style function calls are | |
| 593 | |
| 594 * A command must appear as the first word in a statement, | |
| 595 followed by a space. | |
| 596 | |
| 597 * The first character after the space must not be '=' or '(' | |
| 598 | |
| 599 * The next token after the space must not look like a binary | |
| 600 operator. | |
| 601 | |
| 602 These rules should be mostly compatible with the way Matlab parses | |
| 603 command-style function calls and allow users to define commands in | |
| 604 .m files without having to mark them as commands. | |
| 605 | |
| 606 Note that previous versions of Octave allowed expressions like | |
| 607 | |
| 608 x = load -text foo.dat | |
| 609 | |
| 610 but an expression like this will now generate a parse error. In | |
| 611 order to assign the value returned by a function to a variable, | |
| 612 you must use the normal function call syntax: | |
| 613 | |
| 614 x = load ("-text", "foo.dat"); | |
| 615 | |
| 8737 | 616 ** Block comments. |
| 617 | |
| 8747 | 618 Commented code can be between matching "#{" and "#}" or "%{" and |
| 619 "%}" markers, even if the commented code spans several line. This | |
| 620 allows blocks code to be commented, without needing to comment | |
| 621 each line. For example, | |
| 5814 | 622 |
| 8747 | 623 function [s, t] = func (x, y) |
| 624 s = 2 * x; | |
| 625 #{ | |
| 626 s *= y; | |
| 627 t = y + x; | |
| 628 #} | |
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629 endfunction |
| 5814 | 630 |
| 8747 | 631 the lines "s *= y;" and "t = y + x" will not be executed. |
| 8737 | 632 |
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633 ** If any subfunction in a file ends with "end" or "endfunction", then |
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634 they all must end that way. Previously, Octave accepted |
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635 |
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636 function main () |
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637 ... |
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638 # no endfunction here. |
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639 function sub () |
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640 ... |
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641 endfunction |
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642 |
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643 but this is no longer allowed. |
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644 |
| 8737 | 645 ** Special treatment in the parser of expressions like "a' * b". |
| 2452 | 646 |
| 8737 | 647 In these cases the transpose is no longer explicitly formed and |
| 648 BLAS libraries are called with the transpose flagged, | |
| 649 significantly improving performance for these kinds of | |
| 650 operations. | |
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651 |
| 8737 | 652 ** Single Precision data type. |
| 2452 | 653 |
| 8737 | 654 Octave now includes a single precision data type. Single |
| 655 precision variables can be created with the "single" command, or | |
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656 from functions like ones, eye, etc. For example, |
| 5995 | 657 |
| 8737 | 658 single (1) |
| 659 ones (2, 2, "single") | |
| 660 zeros (2, 2, "single") | |
| 661 eye (2, 2, "single") | |
| 662 Inf (2, 2, "single") | |
| 663 NaN (2, 2, "single") | |
| 664 NA (2, 2, "single") | |
| 7279 | 665 |
| 8737 | 666 all create single precision variables. For compatibility with |
| 667 Matlab, mixed double/single precision operators and functions | |
| 668 return single precision types. | |
| 669 | |
| 670 As a consequence of this addition to Octave the internal | |
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671 representation of the double precision NA value has changed, and |
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672 so users that make use of data generated by Octave with R or |
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673 visa-versa are warned that compatibility might not be assured. |
| 7279 | 674 |
| 8737 | 675 ** Improved array indexing. |
| 676 | |
| 677 The underlying code used for indexing of arrays has been | |
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678 completely rewritten and indexing is now significantly faster. |
| 8737 | 679 |
| 8755 | 680 ** Improved memory management. |
| 681 | |
| 682 Octave will now attempt to share data in some cases where previously | |
| 683 a copy would be made, such as certain array slicing operations or | |
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684 conversions between cells, structs and cs-lists. This usually reduces |
| 8755 | 685 both time and memory consumption. |
| 9128 | 686 Also, Octave will now attempt to detect and optimize usage of a vector |
| 687 as a stack, when elements are being repeatedly inserted at/removed from | |
| 688 the end of the vector. | |
| 8755 | 689 |
| 8738 | 690 ** Improved performance for reduction operations. |
| 691 | |
| 8755 | 692 The performance of the sum, prod, sumsq, cumsum, cumprod, any, all, |
| 693 max and min functions has been significantly improved. | |
| 8738 | 694 |
| 9006 | 695 ** Sorting and searching. |
| 696 | |
| 697 The performance of sort has been improved, especially when sorting | |
| 10453 | 698 indices are requested. An efficient built-in issorted |
| 699 implementation was added. The sortrows function now uses a more | |
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700 efficient algorithm, especially in the homogeneous case. The lookup |
| 10453 | 701 function is now a built-in function performing a binary search, |
| 702 optimized for long runs of close elements. Lookup also works with | |
| 703 cell arrays of strings. | |
| 9006 | 704 |
| 705 ** Range arithmetics | |
| 706 | |
| 10453 | 707 For some operations on ranges, Octave will attempt to keep the |
| 708 result as a range. These include negation, adding a scalar, | |
| 709 subtracting a scalar, and multiplying by a scalar. Ranges with zero | |
| 710 increment are allowed and can be constructed using the built-in | |
| 711 function `ones'. | |
| 9006 | 712 |
| 713 ** Various performance improvements. | |
| 714 | |
| 10453 | 715 Performance of a number of other built-in operations and functions |
| 716 was improved, including: | |
| 9006 | 717 |
| 718 * logical operations | |
| 719 * comparison operators | |
| 720 * element-wise power | |
| 721 * accumarray | |
| 722 * cellfun | |
| 723 * isnan | |
| 724 * isinf | |
| 725 * isfinite | |
| 726 * nchoosek | |
| 727 * repmat | |
| 728 * strcmp | |
| 729 | |
| 8737 | 730 ** 64-bit integer arithmetic. |
| 731 | |
| 732 Arithmetic with 64-bit integers (int64 and uint64 types) is fully | |
| 733 supported, with saturation semantics like the other integer types. | |
| 734 Performance of most integer arithmetic operations has been | |
| 735 improved by using integer arithmetic directly. Previously, Octave | |
| 736 performed integer math with saturation semantics by converting the | |
| 737 operands to double precision, performing the operation, and then | |
| 738 converting the result back to an integer value, truncating if | |
| 739 necessary. | |
| 740 | |
| 8885 | 741 ** Diagonal and permutation matrices. |
| 742 | |
| 743 The interpreter can now treat diagonal and permutation matrices as | |
| 744 special objects that store only the non-zero elements, rather than | |
| 745 general full matrices. Therefore, it is now possible to construct | |
| 746 and use these matrices in linear algebra without suffering a | |
| 747 performance penalty due to storing large numbers of zero elements. | |
| 748 | |
| 749 ** Improvements to fsolve. | |
| 750 | |
| 751 The fsolve function now accepts an option structure argument (see | |
| 752 also the optimset function). The INFO values returned from fsolve | |
| 753 have changed to be compatible with Matlab's fsolve function. | |
| 754 Additionally, fsolve is now able to solve overdetermined systems, | |
| 755 complex-differentiable complex systems, systems with a sparse | |
| 756 jacobian and can work in single precision if given single precision | |
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757 inputs. It can also be called recursively. |
| 8885 | 758 |
| 8737 | 759 ** Improvements to the norm function. |
| 760 | |
| 761 The norm function is now able to compute row or column norms of a | |
| 762 matrix in a single call, as well as general matrix p-norms. | |
| 763 | |
| 764 ** New functions for computing some eigenvalues or singular values. | |
| 765 | |
| 766 The eigs and svds functions have been included in Octave. These | |
| 767 functions require the ARPACK library (now distributed under a | |
| 768 GPL-compatible license). | |
| 769 | |
| 770 ** New QR and Cholesky factorization updating functions. | |
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771 |
| 8737 | 772 choldelete cholshift qrdelete qrshift |
| 773 cholinsert cholupdate qrinsert qrupdate | |
| 774 | |
| 775 ** New quadrature functions. | |
| 776 | |
| 777 dblquad quadgk quadv triplequad | |
| 778 | |
| 8885 | 779 ** New functions for reading and writing images. |
| 780 | |
| 781 The imwrite and imread functions have been included in Octave. | |
| 782 These functions require the GraphicsMagick library. The new | |
| 783 function imfinfo provides information about an image file (size, | |
| 784 type, colors, etc.) | |
| 785 | |
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786 ** The input_event_hook function has been replaced by the pair of |
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787 functions add_input_event_hook and remove_input_event_hook so that |
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788 more than one hook function may be installed at a time. |
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789 |
| 8737 | 790 ** Other miscellaneous new functions. |
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791 |
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792 addtodate hypot reallog |
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793 bicgstab idivide realpow |
| 9006 | 794 cellslices info realsqrt |
| 795 cgs interp1q rectint | |
| 796 command_line_path isdebugmode regexptranslate | |
| 797 contrast isfloat restoredefaultpath | |
| 798 convn isstrprop roundb | |
| 799 cummin log1p rundemos | |
| 800 cummax lsqnonneg runlength | |
| 801 datetick matlabroot saveobj | |
| 802 display namelengthmax spaugment | |
| 803 expm1 nargoutchk strchr | |
| 804 filemarker pathdef strvcat | |
| 805 fstat perl subspace | |
| 806 full prctile symvar | |
| 807 fzero quantile treelayout | |
| 808 genvarname re_read_readline_init_file validatestring | |
| 809 histc | |
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810 |
| 8885 | 811 ** Changes to strcat. |
| 812 | |
| 813 The strcat function is now compatible with Matlab's strcat | |
| 814 function, which removes trailing whitespace when concatenating | |
| 815 character strings. For example | |
| 816 | |
| 817 strcat ('foo ', 'bar') | |
| 818 ==> 'foobar' | |
| 819 | |
| 820 The new function cstrcat provides the previous behavior of | |
| 821 Octave's strcat. | |
| 822 | |
| 823 ** Improvements to the help functions. | |
| 824 | |
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825 The help system has been mostly re-implemented in .m files to make |
| 8885 | 826 it easier to modify. Performance of the lookfor function has been |
| 827 greatly improved by caching the help text from all functions that | |
| 828 are distributed with Octave. The pkg function has been modified | |
| 829 to generate cache files for external packages when they are | |
| 830 installed. | |
| 831 | |
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832 ** Deprecated functions. |
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833 |
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834 The following functions were deprecated in Octave 3.0 and will be |
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835 removed from Octave 3.4 (or whatever version is the second major |
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836 release after 3.0): |
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837 |
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838 beta_cdf geometric_pdf pascal_pdf |
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839 beta_inv geometric_rnd pascal_rnd |
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840 beta_pdf hypergeometric_cdf poisson_cdf |
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841 beta_rnd hypergeometric_inv poisson_inv |
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842 binomial_cdf hypergeometric_pdf poisson_pdf |
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843 binomial_inv hypergeometric_rnd poisson_rnd |
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844 binomial_pdf intersection polyinteg |
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845 binomial_rnd is_bool setstr |
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846 chisquare_cdf is_complex struct_contains |
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847 chisquare_inv is_list struct_elements |
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848 chisquare_pdf is_matrix t_cdf |
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849 chisquare_rnd is_scalar t_inv |
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850 clearplot is_square t_pdf |
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851 clg is_stream t_rnd |
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852 com2str is_struct uniform_cdf |
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853 exponential_cdf is_symmetric uniform_inv |
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854 exponential_inv is_vector uniform_pdf |
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855 exponential_pdf isstr uniform_rnd |
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856 exponential_rnd lognormal_cdf weibcdf |
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857 f_cdf lognormal_inv weibinv |
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858 f_inv lognormal_pdf weibpdf |
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859 f_pdf lognormal_rnd weibrnd |
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860 f_rnd meshdom weibull_cdf |
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861 gamma_cdf normal_cdf weibull_inv |
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862 gamma_inv normal_inv weibull_pdf |
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863 gamma_pdf normal_pdf weibull_rnd |
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864 gamma_rnd normal_rnd wiener_rnd |
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865 geometric_cdf pascal_cdf |
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866 geometric_inv pascal_inv |
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867 |
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868 The following functions are now deprecated in Octave 3.2 and will |
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869 be removed from Octave 3.6 (or whatever version is the second major |
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870 release after 3.2): |
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871 |
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872 create_set spcholinv spmax |
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873 dmult spcumprod spmin |
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874 iscommand spcumsum spprod |
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875 israwcommand spdet spqr |
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876 lchol spdiag spsum |
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877 loadimage spfind spsumsq |
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878 mark_as_command spinv str2mat |
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879 mark_as_rawcommand spkron unmark_command |
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880 spatan2 splchol unmark_rawcommand |
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881 spchol split |
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882 spchol2inv splu |
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883 |
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884 See NEWS.3 for old news. |