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annotate NEWS @ 13251:fd9187676535 stable
3.4.3 release candidate 0
* configure.ac (AC_INIT): Set version to 3.4.3-rc0.
(OCTAVE_RELEASE_DATE): Update.
* NEWS: Update for release.
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Thu, 29 Sep 2011 13:42:30 -0400 |
| parents | 1887d8400ba3 |
| children | 46f5e41c8610 |
| rev | line source |
|---|---|
| 13251 | 1 Summary of important user-visible changes for version 3.4.3: |
| 2 ----------------------------------------------------------- | |
| 3 | |
| 4 ** Octave 3.2.3 is a bug fixing release. | |
| 5 | |
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6 Summary of important user-visible changes for version 3.4.2: |
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7 ----------------------------------------------------------- |
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8 |
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9 ** Octave 3.2.4 fixes some minor installation problems that affected |
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10 version 3.4.1. |
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11 |
| 12709 | 12 Summary of important user-visible changes for version 3.4.1: |
| 13 ----------------------------------------------------------- | |
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14 |
| 12709 | 15 ** Octave 3.4.1 is primarily a bug fixing release. |
| 16 | |
| 17 ** IMPORTANT note about binary incompatibility in this release: | |
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18 |
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19 Binary compatibility for all 3.4.x releases was originally planned, |
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20 but this is impossible for the 3.4.1 release due to a bug in the way |
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21 shared libraries were built in Octave 3.4.0. Because of this bug, |
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22 .oct files built for Octave 3.4.0 must be recompiled before they |
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23 will work with Octave 3.4.1. |
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24 |
| 12709 | 25 Given that there would be binary incompatibilities with shared |
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26 libraries going from Octave 3.4.0 to 3.4.1, the following |
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27 incompatible changes were also made in this release: |
| 12709 | 28 |
| 29 * The Perl Compatible Regular Expression (PCRE) library is now | |
| 30 required to build Octave. | |
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31 |
| 12712 | 32 * Octave's libraries and .oct files are now installed in |
| 33 subdirectories of $libdir instead of $libexecdir. | |
| 34 | |
| 12709 | 35 Any future Octave 3.4.x release versions should remain binary |
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36 compatible with Octave 3.4.1 as proper library versioning is now |
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37 being used as recommended by the libtool manual. |
| 12709 | 38 |
| 39 ** The following functions have been deprecated in Octave 3.4.1 and will | |
| 40 be removed from Octave 3.8 (or whatever version is the second major | |
| 41 release after 3.4): | |
| 42 | |
| 43 cquad is_duplicate_entry perror strerror | |
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44 |
| 12709 | 45 ** The following functions are new in 3.4.1: |
| 46 | |
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47 colstyle gmres iscolumn isrow mgorth nproc rectangle |
| 12709 | 48 |
| 49 ** The get_forge_pkg function is now private. | |
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50 |
| 12709 | 51 ** The rectangle_lw, rectangle_sw, triangle_lw, and triangle_sw |
| 52 functions are now private. | |
| 53 | |
| 54 ** The logistic_regression_derivatives and logistic_regression_likelihood | |
| 55 functions are now private. | |
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56 |
| 12739 | 57 ** ChangeLog files in the Octave sources are no longer maintained |
| 58 by hand. Instead, there is a single ChangeLog file generated from | |
| 59 the Mercurial version control commit messages. Older ChangeLog | |
| 60 information can be found in the etc/OLD-ChangeLogs directory in the | |
| 61 source distribution. | |
| 62 | |
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63 Summary of important user-visible changes for version 3.4: |
| 9352 | 64 --------------------------------------------------------- |
| 65 | |
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66 ** BLAS and LAPACK libraries are now required to build Octave. The |
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67 subset of the reference BLAS and LAPACK libraries has been removed |
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68 from the Octave sources. |
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69 |
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70 ** The ARPACK library is now distributed with Octave so it no longer |
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71 needs to be available as an external dependency when building |
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72 Octave. |
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73 |
| 10118 | 74 ** The `lookup' function was extended to be more useful for |
| 75 general-purpose binary searching. Using this improvement, the | |
| 76 ismember function was rewritten for significantly better | |
| 77 performance. | |
| 9352 | 78 |
| 79 ** Real, integer and logical matrices, when used in indexing, will now | |
| 80 cache the internal index_vector value (zero-based indices) when | |
| 81 successfully used as indices, eliminating the conversion penalty for | |
| 10118 | 82 subsequent indexing by the same matrix. In particular, this means it |
| 83 is no longer needed to avoid repeated indexing by logical arrays | |
| 84 using find for performance reasons. | |
| 9888 | 85 |
| 10118 | 86 ** Logical matrices are now treated more efficiently when used as |
| 87 indices. Octave will keep the index as a logical mask unless the | |
| 88 ratio of true elements is small enough, using a specialized | |
| 89 code. Previously, all logical matrices were always first converted | |
| 90 to index vectors. This results in savings in both memory and | |
| 91 computing time. | |
| 9480 | 92 |
| 10118 | 93 ** The `sub2ind' and `ind2sub' functions were reimplemented as compiled |
| 94 functions for better performance. These functions are now faster, | |
| 95 can deliver more economized results for ranges, and can reuse the | |
| 96 index cache mechanism described in previous paragraph. | |
| 97 | |
| 98 ** The built-in function equivalents to associative operators (`plus', | |
| 99 `times', `mtimes', `and', and `or') have been extended to accept | |
| 100 multiple arguments. This is especially useful for summing | |
| 101 (multiplying, etc.) lists of objects (of possibly distinct types): | |
| 9408 | 102 |
| 9449 | 103 matrix_sum = plus (matrix_list{:}); |
| 104 | |
| 10118 | 105 ** An FTP object type based on libcurl has been implemented. These |
| 106 objects allow ftp connections, downloads and uploads to be | |
| 107 managed. For example, | |
| 9880 | 108 |
| 10118 | 109 fp = ftp ("ftp.octave.org); |
| 110 cd (fp, "gnu/octave"); | |
| 111 mget (fp, "octave-3.2.3.tar.bz2"); | |
| 112 close (fp); | |
| 9880 | 113 |
| 10118 | 114 ** The default behavior of `assert (observed, expected)' has been |
| 115 relaxed to employ less strict checking that does not require the | |
| 116 internals of the values to match. This avoids previously valid | |
| 117 tests from breaking due to new internal classes introduced in future | |
| 118 Octave versions. | |
| 9449 | 119 |
| 120 For instance, all of these assertions were true in Octave 3.0.x | |
| 121 but false in 3.2.x due to new optimizations and improvements: | |
| 122 | |
| 123 assert (2*linspace (1, 5, 5), 2*(1:5)) | |
| 124 assert (zeros (0, 0), []) | |
| 125 assert (2*ones (1, 5), (2) (ones (1,5))) | |
| 9462 | 126 |
| 10118 | 127 ** The behavior of library functions `ismatrix', `issquare', and |
| 128 `issymmetric' has been changed for better consistency. | |
| 9873 | 129 |
| 10292 | 130 * The `ismatrix' function now returns true for all numeric, |
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131 logical and character 2-D or N-D matrices. Previously, `ismatrix' |
| 10292 | 132 returned false if the first or second dimension was zero. |
| 133 Hence, `ismatrix ([])' was false, | |
| 134 while `ismatrix (zeros (1,2,0))' was true. | |
| 9873 | 135 |
| 10118 | 136 * The `issquare' function now returns a logical scalar, and is |
| 137 equivalent to the expression | |
| 138 | |
| 139 ismatrix (x) && ndims (x) == 2 && rows (x) == columns (x) | |
| 140 | |
| 141 The dimension is no longer returned. As a result, `issquare ([])' | |
| 142 now yields true. | |
| 9873 | 143 |
| 10118 | 144 * The `issymmetric' function now checks for symmetry instead of |
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145 Hermitianness. For the latter, ishermitian was created. Also, |
| 10118 | 146 logical scalar is returned rather than the dimension, so |
| 147 `issymmetric ([])' is now true. | |
| 9873 | 148 |
| 10118 | 149 ** Function handles are now aware of overloaded functions. If a |
| 150 function is overloaded, the handle determines at the time of its | |
| 151 reference which function to call. A non-overloaded version does not | |
| 152 need to exist. | |
| 9873 | 153 |
| 10118 | 154 ** Overloading functions for built-in classes (double, int8, cell, |
| 155 etc.) is now compatible with Matlab. | |
| 9408 | 156 |
| 10323 | 157 ** Function handles can now be compared with the == and != operators, |
| 158 as well as the `isequal' function. | |
| 159 | |
| 10118 | 160 ** Performance of concatenation (using []) and the functions `cat', |
| 161 `horzcat', and `vertcat' has been improved for multidimensional | |
| 162 arrays. | |
| 10117 | 163 |
| 9547 | 164 ** The operation-assignment operators +=, -=, *= and /= now behave more |
| 10118 | 165 efficiently in certain cases. For instance, if M is a matrix and S a |
| 166 scalar, then the statement | |
| 9547 | 167 |
| 10118 | 168 M += S; |
| 9547 | 169 |
| 10118 | 170 will operate on M's data in-place if it is not shared by another |
| 171 variable, usually increasing both time and memory efficiency. | |
| 9547 | 172 |
| 9558 | 173 Only selected common combinations are affected, namely: |
| 9547 | 174 |
| 175 matrix += matrix | |
| 176 matrix -= matrix | |
| 9558 | 177 matrix .*= matrix |
| 178 matrix ./= matrix | |
| 179 | |
| 9547 | 180 matrix += scalar |
| 181 matrix -= scalar | |
| 182 matrix *= scalar | |
| 183 matrix /= scalar | |
| 9558 | 184 |
| 9552 | 185 logical matrix |= logical matrix |
| 186 logical matrix &= logical matrix | |
| 9547 | 187 |
| 10118 | 188 where matrix and scalar belong to the same class. The left-hand |
| 189 side must be a simple variable reference. | |
| 9888 | 190 |
| 10118 | 191 Moreover, when unary operators occur in expressions, Octave will |
| 192 also try to do the operation in-place if it's argument is a | |
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193 temporary expression. |
| 9589 | 194 |
| 10118 | 195 ** The effect of comparison operators (<, >, <=, and >=) applied to |
| 196 complex numbers has changed to be consistent with the strict | |
| 197 ordering defined by the `max', `min', and `sort' functions. More | |
| 198 specifically, complex numbers are compared by lexicographical | |
| 199 comparison of the pairs `[abs(z), arg(z)]'. Previously, only real | |
| 200 parts were compared; this can be trivially achieved by wrapping the | |
| 201 operands in real(). | |
| 9547 | 202 |
| 10118 | 203 ** The automatic simplification of complex computation results has |
| 204 changed. Octave will now simplify any complex number with a zero | |
| 205 imaginary part or any complex matrix with all elements having zero | |
| 206 imaginary part to a real value. Previously, this was done only for | |
| 207 positive zeros. Note that the behavior of the complex function is | |
| 208 unchanged and it still produces a complex value even if the | |
| 209 imaginary part is zero. | |
| 9826 | 210 |
| 10118 | 211 ** As a side effect of code refactoring in liboctave, the binary |
| 212 logical operations are now more easily amenable to compiler | |
| 213 optimizations and are thus significantly faster. | |
| 9595 | 214 |
| 10118 | 215 ** Octave now allows user-defined `subsasgn' methods to optimize out |
| 216 redundant copies. For more information, see the manual. | |
| 9595 | 217 |
| 10453 | 218 ** More efficient matrix division handling. Octave is now able to |
| 10118 | 219 handle the expressions |
| 9664 | 220 |
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221 M' \ V |
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222 M.' \ V |
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223 V / M |
| 9664 | 224 |
| 10118 | 225 (M is a matrix and V is a vector) more efficiently in certain cases. |
| 226 In particular, if M is triangular, all three expressions will be | |
| 227 handled by a single call to xTRTRS (from LAPACK), with appropriate | |
| 10453 | 228 flags. Previously, all three expressions required a physical |
| 10118 | 229 transpose of M. |
| 9664 | 230 |
| 10118 | 231 ** More efficient handling of certain mixed real-complex matrix |
| 232 operations. For instance, if RM is a real matrix and CM a complex | |
| 233 matrix, | |
| 9664 | 234 |
| 10118 | 235 RM * CM |
| 9664 | 236 |
| 237 can now be evaluated either as | |
| 238 | |
| 239 complex (RM * real (CM), RM * imag (CM)) | |
| 240 | |
| 241 or as | |
| 242 | |
| 243 complex (RM) * CM, | |
| 244 | |
| 10453 | 245 depending on the dimensions. The first form requires more |
| 246 temporaries and copying, but halves the FLOP count, which normally | |
| 247 brings better performance if RM has enough rows. Previously, the | |
| 248 second form was always used. | |
| 9664 | 249 |
| 11111 | 250 Matrix division is similarly affected. |
| 9664 | 251 |
| 10118 | 252 ** More efficient handling of triangular matrix factors returned from |
| 253 factorizations. The functions for computing QR, LU and Cholesky | |
| 254 factorizations will now automatically return the triangular matrix | |
| 255 factors with proper internal matrix_type set, so that it won't need | |
| 256 to be computed when the matrix is used for division. | |
| 9717 | 257 |
| 10118 | 258 ** The built-in `sum' function now handles the non-native summation |
| 259 (i.e., double precision sum of single or integer inputs) more | |
| 260 efficiently, avoiding a temporary conversion of the whole input | |
| 261 array to doubles. Further, `sum' can now accept an extra option | |
| 262 argument, using a compensated summation algorithm rather than a | |
| 263 straightforward sum, which significantly improves precision if lots | |
| 264 of cancellation occurs in the summation. | |
| 9717 | 265 |
| 10118 | 266 ** The built-in `bsxfun' function now uses optimized code for certain |
| 267 cases where built-in operator handles are passed in. Namely, the | |
| 268 optimizations concern the operators `plus', `minus', `times', | |
| 269 `ldivide', `rdivide', `power', `and', `or' (for logical arrays), | |
| 270 the relational operators `eq', `ne', `lt', `le', `gt', `ge', and the | |
| 271 functions `min' and `max'. Optimizations only apply when both | |
| 272 operands are of the same built-in class. Mixed real/complex and | |
| 273 single/double operations will first convert both operands to a | |
| 274 common type. | |
| 9745 | 275 |
| 10118 | 276 ** The `strfind' and `strrep' functions now have compiled |
| 277 implementations, facilitating significantly more efficient searching | |
| 278 and replacing in strings, especially with longer patterns. The code | |
| 279 of `strcat' has been vectorized and is now much more efficient when | |
| 280 many strings are concatenated. The `strcmpi' and `strncmpi' | |
| 281 functions are now built-in functions, providing better performance. | |
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282 |
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283 ** 'str2double' now has a compiled implementation and the API conforms |
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284 to Matlab. The additional Octave-specific features of returning a |
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285 boolean matrix indicating which elements were successfully converted |
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286 has been removed. |
| 10208 | 287 |
| 10453 | 288 ** Matlab-style ignoring input and output function arguments using |
| 11111 | 289 tilde (~) is now supported. Ignored output arguments may be |
| 290 detected from a function using the built-in function `isargout'. | |
| 291 For more details, consult the manual. | |
| 10886 | 292 |
| 10453 | 293 ** The list datatype, deprecated since the introduction of cells, has |
| 294 been removed. | |
| 10276 | 295 |
| 10453 | 296 ** The accumarray function has been optimized and is now significantly |
| 297 faster in certain important cases. | |
| 10054 | 298 |
| 10292 | 299 ** The behavior of isreal and isnumeric functions was changed to be more |
| 300 Matlab-compatible. | |
| 301 | |
| 10406 | 302 ** The integer math & conversion warnings (Octave:int-convert-nan, |
| 303 Octave:int-convert-non-int-val, Octave:int-convert-overflow, | |
| 11111 | 304 Octave:int-math-overflow) have been removed. |
| 10406 | 305 |
| 10453 | 306 ** rem and mod are now built-in functions. They also handle integer |
| 307 types efficiently using integer arithmetic. | |
| 10437 | 308 |
| 10536 | 309 ** Sparse indexing and indexed assignment has been mostly rewritten. |
| 310 Since Octave uses compressed column storage for sparse matrices, | |
| 311 major attention is devoted to operations manipulating whole columns. | |
| 312 Such operations are now significantly faster, as well as some other | |
| 313 important cases. | |
| 314 | |
| 315 Further, it is now possible to pre-allocate a sparse matrix and | |
| 316 subsequently fill it by assignments, provided they meet certain | |
| 317 conditions. For more information, consult the `spalloc' function, | |
| 318 which is no longer a mere dummy. Consequently, nzmax and nnz are no | |
| 11111 | 319 longer always equal in Octave. Octave may also produce a matrix |
| 320 with nnz < nzmax as a result of other operations, so you should | |
| 321 consistently use nnz unless you really want to use nzmax (i.e. the | |
| 322 space allocated for nonzero elements). | |
| 10536 | 323 |
| 324 Sparse concatenation is also affected, and concatenating sparse | |
| 325 matrices, especially larger collections, is now significantly more | |
| 11111 | 326 efficient. This applies to both the [] operator and the |
| 10536 | 327 cat/vertcat/horzcat functions. |
| 328 | |
| 11111 | 329 ** It is now possible to optionally employ the xGESDD LAPACK drivers |
| 330 for computing the singular value decomposition using svd(), instead | |
| 331 of the default xGESVD, using the configuration pseudo-variable | |
| 332 svd_driver. The xGESDD driver can be up to 6x times faster when | |
| 333 singular vectors are requested, but is reported to be somewhat less | |
| 10639 | 334 robust on highly ill-conditioned matrices. |
| 335 | |
| 336 ** Configuration pseudo-variables, such as page_screen_output or | |
| 337 confirm_recursive_rmdir (or the above mentioned svd_driver), now | |
| 338 accept a "local" option as second argument, requesting the change | |
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339 to be undone when the current function returns: |
| 10639 | 340 |
| 341 function [status, msg] = rm_rf (dir) | |
| 342 confirm_recursive_rmdir (false, "local"); | |
| 343 [status, msg] = rmdir (dir, "s"); | |
| 344 ... | |
| 345 endfunction | |
| 346 | |
| 347 Upon return, confirm_recursive_rmdir will be restored to the value | |
| 348 it had on entry to the function, even if there were subsequent | |
| 349 changes to the variable in function rm_rf or any of the functions | |
| 350 it calls. | |
| 351 | |
| 11111 | 352 ** pkg now accepts a -forge option for downloading and installing |
| 353 packages from Octave Forge automatically. For example, | |
| 10774 | 354 |
| 355 pkg install -forge general | |
| 356 | |
| 11111 | 357 will automatically download the latest release of the general |
| 358 package and attempt to install it. No automatic resolving of | |
| 359 dependencies is provided. Further, | |
| 10639 | 360 |
| 10774 | 361 pkg list -forge |
| 362 | |
| 363 can be used to list all available packages. | |
| 364 | |
|
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365 ** The internal data representation of structs has been completely |
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366 rewritten to make certain optimizations feasible. The field data |
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367 can now be shared between structs with equal keys but different |
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368 dimensions or values, making operations that preserve the fields |
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369 faster. Economized storage is now used for scalar structs (just |
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370 like most other scalars), making their usage more |
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371 memory-efficient. Certain array-like operations on structs |
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372 (concatenation, uniform cellfun, num2cell) have gained a |
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373 significant speed-up. Additionally, the octave_scalar_map class |
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374 now provides a simpler interface to work with scalar structs within |
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375 a C++ DLD function. |
| 10639 | 376 |
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377 ** Two new formats are available for displaying numbers: |
| 11111 | 378 |
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379 format short eng |
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380 format long eng |
| 11111 | 381 |
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382 Both display numbers in engineering notation, i.e., mantissa + |
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383 exponent where the exponent is a multiple of 3. |
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384 |
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385 ** The following functions are new in Octave 3.4: |
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386 accumdim erfcx nfields pqpnonneg uigetdir |
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387 bitpack fileread nth_element quadcc uigetfile |
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388 bitunpack fminbnd onCleanup randi uiputfile |
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389 blkmm fskipl pbaspect repelems uimenu |
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390 cbrt ifelse pie3 reset whitebg |
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391 curl ishermitian powerset rsf2csf |
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392 chop isindex ppder saveas |
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393 daspect luupdate ppint strread |
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394 divergence merge ppjumps textread |
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395 |
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396 ** Using the image function to view images with external programs such |
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397 as display, xv, and xloadimage is no longer supported. The |
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398 image_viewer function has also been removed. |
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399 |
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400 ** The behavior of struct assignments to non-struct values has been |
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401 changed. Previously, it was possible to overwrite an arbitrary |
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402 value: |
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403 |
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404 a = 1; |
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405 a.x = 2; |
| 10873 | 406 |
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407 This is no longer possible unless a is an empty matrix or cell |
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408 array. |
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409 |
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410 ** The dlmread function has been extended to allow specifying a custom |
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411 value for empty fields. |
| 10829 | 412 |
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413 ** The dlmread and dlmwrite functions have been modified to accept |
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414 file IDs (as returned by fopen) in addition to file names. |
| 11111 | 415 |
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416 ** Octave can now optimize away the interpreter overhead of an |
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417 anonymous function handle, if the function simply calls another |
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418 function or handle with some of its parameters bound to certain |
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419 values. Example: |
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420 |
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421 f = @(x) sum (x, 1); |
| 10966 | 422 |
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423 When f is called, the call is forwarded to @sum with the constant 1 |
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424 appended, and the anonymous function call does not occur on the |
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425 call stack. |
| 10829 | 426 |
| 12424 | 427 ** For compatibility with Matlab, mu2lin (x) is now equivalent to |
| 428 mu2lin (x, 0). | |
| 429 | |
| 430 ** The new function `history_control' may be used to control the way | |
| 431 command lines are added to the history list when Octave is using | |
| 432 readline for command-line editing. For example | |
| 433 | |
| 434 history_control ("ignoredups") | |
| 435 | |
| 436 tells Octave to avoid adding duplicate lines to the history list. | |
| 437 | |
| 438 ** Octave now uses the gnulib library for improved portability and to | |
| 439 avoid bugs in operating system functions. | |
| 440 | |
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441 ** Deprecated functions. |
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442 |
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443 The following functions were deprecated in Octave 3.0 and have been |
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444 removed from Octave 3.4. |
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445 |
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446 beta_cdf geometric_pdf pascal_pdf |
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447 beta_inv geometric_rnd pascal_rnd |
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448 beta_pdf hypergeometric_cdf poisson_cdf |
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449 beta_rnd hypergeometric_inv poisson_inv |
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450 binomial_cdf hypergeometric_pdf poisson_pdf |
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451 binomial_inv hypergeometric_rnd poisson_rnd |
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452 binomial_pdf intersection polyinteg |
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453 binomial_rnd is_bool setstr |
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454 chisquare_cdf is_complex struct_contains |
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455 chisquare_inv is_list struct_elements |
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456 chisquare_pdf is_matrix t_cdf |
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457 chisquare_rnd is_scalar t_inv |
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458 clearplot is_square t_pdf |
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459 clg is_stream t_rnd |
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460 com2str is_struct uniform_cdf |
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461 exponential_cdf is_symmetric uniform_inv |
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462 exponential_inv is_vector uniform_pdf |
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463 exponential_pdf isstr uniform_rnd |
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464 exponential_rnd lognormal_cdf weibcdf |
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465 f_cdf lognormal_inv weibinv |
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466 f_inv lognormal_pdf weibpdf |
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467 f_pdf lognormal_rnd weibrnd |
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468 f_rnd meshdom weibull_cdf |
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469 gamma_cdf normal_cdf weibull_inv |
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470 gamma_inv normal_inv weibull_pdf |
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471 gamma_pdf normal_pdf weibull_rnd |
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472 gamma_rnd normal_rnd wiener_rnd |
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473 geometric_cdf pascal_cdf |
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474 geometric_inv pascal_inv |
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475 |
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476 The following functions were deprecated in Octave 3.2 and will |
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477 be removed from Octave 3.6 (or whatever version is the second major |
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478 release after 3.2): |
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479 |
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480 create_set spcholinv splu |
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481 dmult spcumprod spmax |
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482 iscommand spcumsum spmin |
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483 israwcommand spdet spprod |
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484 lchol spdiag spqr |
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485 loadimage spfind spsum |
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486 mark_as_command sphcat spsumsq |
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487 mark_as_rawcommand spinv spvcat |
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488 spatan2 spkron str2mat |
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489 spchol splchol unmark_command |
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490 spchol2inv split unmark_rawcommand |
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491 |
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492 The following functions have been deprecated in Octave 3.4 and will |
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493 be removed from Octave 3.8 (or whatever version is the second major |
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494 release after 3.4): |
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495 |
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496 autocor cellidx gammai krylovb saveimage |
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497 autocov dispatch glpkmex perror strerror |
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498 betai fstat is_global replot values |
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499 |
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500 Summary of important user-visible changes for version 3.2: |
| 5913 | 501 --------------------------------------------------------- |
| 2452 | 502 |
| 8737 | 503 ** Compatibility with Matlab graphics has been improved. |
| 6329 | 504 |
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505 The hggroup object and associated listener callback functions have |
| 8737 | 506 been added allowing the inclusion of group objects. Data sources |
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507 have been added to these group objects such that |
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508 |
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509 x = 0:0.1:10; |
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510 y = sin (x); |
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511 plot (x, y, "ydatasource", "y"); |
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512 for i = 1 : 100 |
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513 pause(0.1) |
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514 y = sin (x + 0.1 * i); |
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515 refreshdata(); |
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516 endfor |
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517 |
| 8737 | 518 works as expected. This capability has be used to introduce |
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519 stem-series, bar-series, etc., objects for better Matlab |
| 8737 | 520 compatibility. |
| 521 | |
| 522 ** New graphics functions: | |
| 523 | |
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524 addlistener ezcontour gcbo refresh |
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525 addproperty ezcontourf ginput refreshdata |
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526 allchild ezmesh gtext specular |
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527 available_graphics_toolkits ezmeshc intwarning surfl |
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528 graphics_toolkit ezplot ishghandle trisurf |
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529 cla ezplot3 isocolors waitforbuttonpress |
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530 clabel ezpolar isonormals |
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531 comet ezsurf isosurface |
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532 dellistener findall linkprop |
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533 diffuse gcbf plotmatrix |
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534 |
| 8737 | 535 ** New experimental OpenGL/FLTK based plotting system. |
| 536 | |
| 537 An experimental plotting system based on OpenGL and the FLTK | |
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538 toolkit is now part of Octave. This graphics toolkit is disabled by |
| 8737 | 539 default. You can switch to using it with the command |
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540 |
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541 graphics_toolkit ("fltk") |
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542 |
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543 for all future figures or for a particular figure with the command |
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544 |
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545 graphics_toolkit (h, "fltk") |
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546 |
| 11139 | 547 where "h" is a valid figure handle. |
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548 |
| 8737 | 549 ** Functions providing direct access to gnuplot have been removed. |
| 550 | |
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551 The functions __gnuplot_plot__, __gnuplot_set__, __gnuplot_raw__, |
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552 __gnuplot_show__, __gnuplot_replot__, __gnuplot_splot__, |
| 8737 | 553 __gnuplot_save_data__ and __gnuplot_send_inline_data__ have been |
| 554 removed from Octave. These function were incompatible with the | |
| 555 high level graphics handle code. | |
| 6329 | 556 |
| 8885 | 557 ** The Control, Finance and Quaternion functions have been removed. |
| 558 | |
| 559 These functions are now available as separate packages from | |
| 560 | |
| 561 http://octave.sourceforge.net/packages.html | |
| 562 | |
| 563 and can be reinstalled using the Octave package manager (see | |
| 564 the pkg function). | |
| 565 | |
| 566 ** Specific sparse matrix functions removed. | |
| 567 | |
| 568 The following functions, which handled only sparse matrices have | |
| 569 been removed. Instead of calling these functions directly, you | |
| 570 should use the corresponding function without the "sp" prefix. | |
| 8737 | 571 |
| 8885 | 572 spatan2 spcumsum spkron spprod |
| 573 spchol spdet splchol spqr | |
| 574 spchol2inv spdiag splu spsum | |
| 575 spcholinv spfind spmax spsumsqk | |
| 576 spcumprod spinv spmin | |
| 577 | |
| 578 ** Improvements to the debugger. | |
| 579 | |
| 580 The interactive debugging features have been improved. Stopping | |
| 581 on statements with dbstop should work correctly now. Stepping | |
| 582 into and over functions, and stepping one statement at a time | |
| 583 (with dbstep) now works. Moving up and down the call stack with | |
| 584 dbup and dbdown now works. The dbstack function is now available | |
| 585 to print the current function call stack. The new dbquit function | |
| 586 is available to exit the debugging mode. | |
| 587 | |
| 588 ** Improved traceback error messages. | |
| 589 | |
| 590 Traceback error messages are much more concise and easier to | |
| 591 understand. They now display information about the function call | |
| 592 stack instead of the stack of all statements that were active at | |
| 593 the point of the error. | |
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594 |
| 8737 | 595 ** Object Oriented Programming. |
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596 |
| 8737 | 597 Octave now includes OOP features and the user can create their own |
| 598 class objects and overloaded functions and operators. For | |
| 599 example, all methods of a class called "myclass" will be found in | |
| 600 a directory "@myclass" on the users path. The class specific | |
| 601 versions of functions and operators take precedence over the | |
| 602 generic versions of these functions. | |
| 603 | |
| 604 New functions related to OOP include | |
| 7189 | 605 |
| 8737 | 606 class inferiorto isobject loadobj methods superiorto |
| 607 | |
| 608 See the Octave manual for more details. | |
| 7038 | 609 |
| 8747 | 610 ** Parsing of Command-style Functions. |
| 611 | |
| 612 Octave now parses command-style functions without needing to first | |
| 613 declare them with "mark_as_command". The rules for recognizing a | |
| 614 command-style function calls are | |
| 615 | |
| 616 * A command must appear as the first word in a statement, | |
| 617 followed by a space. | |
| 618 | |
| 619 * The first character after the space must not be '=' or '(' | |
| 620 | |
| 621 * The next token after the space must not look like a binary | |
| 622 operator. | |
| 623 | |
| 624 These rules should be mostly compatible with the way Matlab parses | |
| 625 command-style function calls and allow users to define commands in | |
| 626 .m files without having to mark them as commands. | |
| 627 | |
| 628 Note that previous versions of Octave allowed expressions like | |
| 629 | |
| 630 x = load -text foo.dat | |
| 631 | |
| 632 but an expression like this will now generate a parse error. In | |
| 633 order to assign the value returned by a function to a variable, | |
| 634 you must use the normal function call syntax: | |
| 635 | |
| 636 x = load ("-text", "foo.dat"); | |
| 637 | |
| 8737 | 638 ** Block comments. |
| 639 | |
| 8747 | 640 Commented code can be between matching "#{" and "#}" or "%{" and |
| 641 "%}" markers, even if the commented code spans several line. This | |
| 642 allows blocks code to be commented, without needing to comment | |
| 643 each line. For example, | |
| 5814 | 644 |
| 8747 | 645 function [s, t] = func (x, y) |
| 646 s = 2 * x; | |
| 647 #{ | |
| 648 s *= y; | |
| 649 t = y + x; | |
| 650 #} | |
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651 endfunction |
| 5814 | 652 |
| 8747 | 653 the lines "s *= y;" and "t = y + x" will not be executed. |
| 8737 | 654 |
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655 ** If any subfunction in a file ends with "end" or "endfunction", then |
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656 they all must end that way. Previously, Octave accepted |
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657 |
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658 function main () |
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659 ... |
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660 # no endfunction here. |
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661 function sub () |
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662 ... |
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663 endfunction |
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664 |
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665 but this is no longer allowed. |
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666 |
| 8737 | 667 ** Special treatment in the parser of expressions like "a' * b". |
| 2452 | 668 |
| 8737 | 669 In these cases the transpose is no longer explicitly formed and |
| 670 BLAS libraries are called with the transpose flagged, | |
| 671 significantly improving performance for these kinds of | |
| 672 operations. | |
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673 |
| 8737 | 674 ** Single Precision data type. |
| 2452 | 675 |
| 8737 | 676 Octave now includes a single precision data type. Single |
| 677 precision variables can be created with the "single" command, or | |
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678 from functions like ones, eye, etc. For example, |
| 5995 | 679 |
| 8737 | 680 single (1) |
| 681 ones (2, 2, "single") | |
| 682 zeros (2, 2, "single") | |
| 683 eye (2, 2, "single") | |
| 684 Inf (2, 2, "single") | |
| 685 NaN (2, 2, "single") | |
| 686 NA (2, 2, "single") | |
| 7279 | 687 |
| 8737 | 688 all create single precision variables. For compatibility with |
| 689 Matlab, mixed double/single precision operators and functions | |
| 690 return single precision types. | |
| 691 | |
| 692 As a consequence of this addition to Octave the internal | |
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693 representation of the double precision NA value has changed, and |
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694 so users that make use of data generated by Octave with R or |
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695 visa-versa are warned that compatibility might not be assured. |
| 7279 | 696 |
| 8737 | 697 ** Improved array indexing. |
| 698 | |
| 699 The underlying code used for indexing of arrays has been | |
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700 completely rewritten and indexing is now significantly faster. |
| 8737 | 701 |
| 8755 | 702 ** Improved memory management. |
| 703 | |
| 704 Octave will now attempt to share data in some cases where previously | |
| 705 a copy would be made, such as certain array slicing operations or | |
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706 conversions between cells, structs and cs-lists. This usually reduces |
| 8755 | 707 both time and memory consumption. |
| 9128 | 708 Also, Octave will now attempt to detect and optimize usage of a vector |
| 709 as a stack, when elements are being repeatedly inserted at/removed from | |
| 710 the end of the vector. | |
| 8755 | 711 |
| 8738 | 712 ** Improved performance for reduction operations. |
| 713 | |
| 8755 | 714 The performance of the sum, prod, sumsq, cumsum, cumprod, any, all, |
| 715 max and min functions has been significantly improved. | |
| 8738 | 716 |
| 9006 | 717 ** Sorting and searching. |
| 718 | |
| 719 The performance of sort has been improved, especially when sorting | |
| 10453 | 720 indices are requested. An efficient built-in issorted |
| 721 implementation was added. The sortrows function now uses a more | |
|
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722 efficient algorithm, especially in the homogeneous case. The lookup |
| 10453 | 723 function is now a built-in function performing a binary search, |
| 724 optimized for long runs of close elements. Lookup also works with | |
| 725 cell arrays of strings. | |
| 9006 | 726 |
| 727 ** Range arithmetics | |
| 728 | |
| 10453 | 729 For some operations on ranges, Octave will attempt to keep the |
| 730 result as a range. These include negation, adding a scalar, | |
| 731 subtracting a scalar, and multiplying by a scalar. Ranges with zero | |
| 732 increment are allowed and can be constructed using the built-in | |
| 733 function `ones'. | |
| 9006 | 734 |
| 735 ** Various performance improvements. | |
| 736 | |
| 10453 | 737 Performance of a number of other built-in operations and functions |
| 738 was improved, including: | |
| 9006 | 739 |
| 740 * logical operations | |
| 741 * comparison operators | |
| 742 * element-wise power | |
| 743 * accumarray | |
| 744 * cellfun | |
| 745 * isnan | |
| 746 * isinf | |
| 747 * isfinite | |
| 748 * nchoosek | |
| 749 * repmat | |
| 750 * strcmp | |
| 751 | |
| 8737 | 752 ** 64-bit integer arithmetic. |
| 753 | |
| 754 Arithmetic with 64-bit integers (int64 and uint64 types) is fully | |
| 755 supported, with saturation semantics like the other integer types. | |
| 756 Performance of most integer arithmetic operations has been | |
| 757 improved by using integer arithmetic directly. Previously, Octave | |
| 758 performed integer math with saturation semantics by converting the | |
| 759 operands to double precision, performing the operation, and then | |
| 760 converting the result back to an integer value, truncating if | |
| 761 necessary. | |
| 762 | |
| 8885 | 763 ** Diagonal and permutation matrices. |
| 764 | |
| 765 The interpreter can now treat diagonal and permutation matrices as | |
| 766 special objects that store only the non-zero elements, rather than | |
| 767 general full matrices. Therefore, it is now possible to construct | |
| 768 and use these matrices in linear algebra without suffering a | |
| 769 performance penalty due to storing large numbers of zero elements. | |
| 770 | |
| 771 ** Improvements to fsolve. | |
| 772 | |
| 773 The fsolve function now accepts an option structure argument (see | |
| 774 also the optimset function). The INFO values returned from fsolve | |
| 775 have changed to be compatible with Matlab's fsolve function. | |
| 776 Additionally, fsolve is now able to solve overdetermined systems, | |
| 777 complex-differentiable complex systems, systems with a sparse | |
| 778 jacobian and can work in single precision if given single precision | |
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779 inputs. It can also be called recursively. |
| 8885 | 780 |
| 8737 | 781 ** Improvements to the norm function. |
| 782 | |
| 783 The norm function is now able to compute row or column norms of a | |
| 784 matrix in a single call, as well as general matrix p-norms. | |
| 785 | |
| 786 ** New functions for computing some eigenvalues or singular values. | |
| 787 | |
| 788 The eigs and svds functions have been included in Octave. These | |
| 789 functions require the ARPACK library (now distributed under a | |
| 790 GPL-compatible license). | |
| 791 | |
| 792 ** New QR and Cholesky factorization updating functions. | |
|
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|
793 |
| 8737 | 794 choldelete cholshift qrdelete qrshift |
| 795 cholinsert cholupdate qrinsert qrupdate | |
| 796 | |
| 797 ** New quadrature functions. | |
| 798 | |
| 799 dblquad quadgk quadv triplequad | |
| 800 | |
| 8885 | 801 ** New functions for reading and writing images. |
| 802 | |
| 803 The imwrite and imread functions have been included in Octave. | |
| 804 These functions require the GraphicsMagick library. The new | |
| 805 function imfinfo provides information about an image file (size, | |
| 806 type, colors, etc.) | |
| 807 | |
|
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808 ** The input_event_hook function has been replaced by the pair of |
|
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809 functions add_input_event_hook and remove_input_event_hook so that |
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810 more than one hook function may be installed at a time. |
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|
811 |
| 8737 | 812 ** Other miscellaneous new functions. |
|
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813 |
|
8932
2d0f8692a82e
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814 addtodate hypot reallog |
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|
815 bicgstab idivide realpow |
| 9006 | 816 cellslices info realsqrt |
| 817 cgs interp1q rectint | |
| 818 command_line_path isdebugmode regexptranslate | |
| 819 contrast isfloat restoredefaultpath | |
| 820 convn isstrprop roundb | |
| 821 cummin log1p rundemos | |
| 822 cummax lsqnonneg runlength | |
| 823 datetick matlabroot saveobj | |
| 824 display namelengthmax spaugment | |
| 825 expm1 nargoutchk strchr | |
| 826 filemarker pathdef strvcat | |
| 827 fstat perl subspace | |
| 828 full prctile symvar | |
| 829 fzero quantile treelayout | |
| 830 genvarname re_read_readline_init_file validatestring | |
| 831 histc | |
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832 |
| 8885 | 833 ** Changes to strcat. |
| 834 | |
| 835 The strcat function is now compatible with Matlab's strcat | |
| 836 function, which removes trailing whitespace when concatenating | |
| 837 character strings. For example | |
| 838 | |
| 839 strcat ('foo ', 'bar') | |
| 840 ==> 'foobar' | |
| 841 | |
| 842 The new function cstrcat provides the previous behavior of | |
| 843 Octave's strcat. | |
| 844 | |
| 845 ** Improvements to the help functions. | |
| 846 | |
|
9034
52515efc50c0
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847 The help system has been mostly re-implemented in .m files to make |
| 8885 | 848 it easier to modify. Performance of the lookfor function has been |
| 849 greatly improved by caching the help text from all functions that | |
| 850 are distributed with Octave. The pkg function has been modified | |
| 851 to generate cache files for external packages when they are | |
| 852 installed. | |
| 853 | |
|
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854 ** Deprecated functions. |
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855 |
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|
856 The following functions were deprecated in Octave 3.0 and will be |
|
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857 removed from Octave 3.4 (or whatever version is the second major |
|
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858 release after 3.0): |
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859 |
|
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860 beta_cdf geometric_pdf pascal_pdf |
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861 beta_inv geometric_rnd pascal_rnd |
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862 beta_pdf hypergeometric_cdf poisson_cdf |
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863 beta_rnd hypergeometric_inv poisson_inv |
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864 binomial_cdf hypergeometric_pdf poisson_pdf |
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865 binomial_inv hypergeometric_rnd poisson_rnd |
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866 binomial_pdf intersection polyinteg |
|
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|
867 binomial_rnd is_bool setstr |
|
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|
868 chisquare_cdf is_complex struct_contains |
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|
869 chisquare_inv is_list struct_elements |
|
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870 chisquare_pdf is_matrix t_cdf |
|
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|
871 chisquare_rnd is_scalar t_inv |
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|
872 clearplot is_square t_pdf |
|
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873 clg is_stream t_rnd |
|
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|
874 com2str is_struct uniform_cdf |
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875 exponential_cdf is_symmetric uniform_inv |
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|
876 exponential_inv is_vector uniform_pdf |
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|
877 exponential_pdf isstr uniform_rnd |
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|
878 exponential_rnd lognormal_cdf weibcdf |
|
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|
879 f_cdf lognormal_inv weibinv |
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880 f_inv lognormal_pdf weibpdf |
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881 f_pdf lognormal_rnd weibrnd |
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882 f_rnd meshdom weibull_cdf |
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883 gamma_cdf normal_cdf weibull_inv |
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|
884 gamma_inv normal_inv weibull_pdf |
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885 gamma_pdf normal_pdf weibull_rnd |
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|
886 gamma_rnd normal_rnd wiener_rnd |
|
8888
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887 geometric_cdf pascal_cdf |
|
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|
888 geometric_inv pascal_inv |
|
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|
889 |
|
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890 The following functions are now deprecated in Octave 3.2 and will |
|
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891 be removed from Octave 3.6 (or whatever version is the second major |
|
8888
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|
892 release after 3.2): |
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893 |
|
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|
894 create_set spcholinv spmax |
|
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|
895 dmult spcumprod spmin |
|
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896 iscommand spcumsum spprod |
|
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897 israwcommand spdet spqr |
|
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|
898 lchol spdiag spsum |
|
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|
899 loadimage spfind spsumsq |
|
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|
900 mark_as_command spinv str2mat |
|
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|
901 mark_as_rawcommand spkron unmark_command |
|
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|
902 spatan2 splchol unmark_rawcommand |
|
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|
903 spchol split |
|
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|
904 spchol2inv splu |
|
0c7b0049c023
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|
905 |
|
7990
86dae6e5b83c
Initial update of NEWS for 3.2 release
David Bateman <dbateman@free.fr>
parents:
7279
diff
changeset
|
906 See NEWS.3 for old news. |