Mercurial > hg > octave-lyh
annotate NEWS @ 12746:07188dbaf89a stable
maint: minor update to NEWS file
* NEWS: minor fix in binary incompatibility note.
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Wed, 15 Jun 2011 10:33:44 -0400 |
| parents | 8d2d7f9a17be |
| children | bb55443911ff 1887d8400ba3 |
| 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 |
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8 Binary compatibility for all 3.4.x releases was originally planned, |
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9 but this is impossible for the 3.4.1 release due to a bug in the way |
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10 shared libraries were built in Octave 3.4.0. Because of this bug, |
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11 .oct files built for Octave 3.4.0 must be recompiled before they |
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12 will work with Octave 3.4.1. |
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13 |
| 12709 | 14 Given that there would be binary incompatibilities with shared |
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15 libraries going from Octave 3.4.0 to 3.4.1, the following |
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16 incompatible changes were also made in this release: |
| 12709 | 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 |
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25 compatible with Octave 3.4.1 as proper library versioning is now |
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26 being used as recommended by the libtool manual. |
| 12709 | 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 | |
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36 colstyle gmres iscolumn isrow mgorth nproc rectangle |
| 12709 | 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 |
| 12739 | 46 ** ChangeLog files in the Octave sources are no longer maintained |
| 47 by hand. Instead, there is a single ChangeLog file generated from | |
| 48 the Mercurial version control commit messages. Older ChangeLog | |
| 49 information can be found in the etc/OLD-ChangeLogs directory in the | |
| 50 source distribution. | |
| 51 | |
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52 Summary of important user-visible changes for version 3.4: |
| 9352 | 53 --------------------------------------------------------- |
| 54 | |
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55 ** BLAS and LAPACK libraries are now required to build Octave. The |
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56 subset of the reference BLAS and LAPACK libraries has been removed |
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57 from the Octave sources. |
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58 |
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59 ** The ARPACK library is now distributed with Octave so it no longer |
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60 needs to be available as an external dependency when building |
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61 Octave. |
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62 |
| 10118 | 63 ** The `lookup' function was extended to be more useful for |
| 64 general-purpose binary searching. Using this improvement, the | |
| 65 ismember function was rewritten for significantly better | |
| 66 performance. | |
| 9352 | 67 |
| 68 ** Real, integer and logical matrices, when used in indexing, will now | |
| 69 cache the internal index_vector value (zero-based indices) when | |
| 70 successfully used as indices, eliminating the conversion penalty for | |
| 10118 | 71 subsequent indexing by the same matrix. In particular, this means it |
| 72 is no longer needed to avoid repeated indexing by logical arrays | |
| 73 using find for performance reasons. | |
| 9888 | 74 |
| 10118 | 75 ** Logical matrices are now treated more efficiently when used as |
| 76 indices. Octave will keep the index as a logical mask unless the | |
| 77 ratio of true elements is small enough, using a specialized | |
| 78 code. Previously, all logical matrices were always first converted | |
| 79 to index vectors. This results in savings in both memory and | |
| 80 computing time. | |
| 9480 | 81 |
| 10118 | 82 ** The `sub2ind' and `ind2sub' functions were reimplemented as compiled |
| 83 functions for better performance. These functions are now faster, | |
| 84 can deliver more economized results for ranges, and can reuse the | |
| 85 index cache mechanism described in previous paragraph. | |
| 86 | |
| 87 ** The built-in function equivalents to associative operators (`plus', | |
| 88 `times', `mtimes', `and', and `or') have been extended to accept | |
| 89 multiple arguments. This is especially useful for summing | |
| 90 (multiplying, etc.) lists of objects (of possibly distinct types): | |
| 9408 | 91 |
| 9449 | 92 matrix_sum = plus (matrix_list{:}); |
| 93 | |
| 10118 | 94 ** An FTP object type based on libcurl has been implemented. These |
| 95 objects allow ftp connections, downloads and uploads to be | |
| 96 managed. For example, | |
| 9880 | 97 |
| 10118 | 98 fp = ftp ("ftp.octave.org); |
| 99 cd (fp, "gnu/octave"); | |
| 100 mget (fp, "octave-3.2.3.tar.bz2"); | |
| 101 close (fp); | |
| 9880 | 102 |
| 10118 | 103 ** The default behavior of `assert (observed, expected)' has been |
| 104 relaxed to employ less strict checking that does not require the | |
| 105 internals of the values to match. This avoids previously valid | |
| 106 tests from breaking due to new internal classes introduced in future | |
| 107 Octave versions. | |
| 9449 | 108 |
| 109 For instance, all of these assertions were true in Octave 3.0.x | |
| 110 but false in 3.2.x due to new optimizations and improvements: | |
| 111 | |
| 112 assert (2*linspace (1, 5, 5), 2*(1:5)) | |
| 113 assert (zeros (0, 0), []) | |
| 114 assert (2*ones (1, 5), (2) (ones (1,5))) | |
| 9462 | 115 |
| 10118 | 116 ** The behavior of library functions `ismatrix', `issquare', and |
| 117 `issymmetric' has been changed for better consistency. | |
| 9873 | 118 |
| 10292 | 119 * The `ismatrix' function now returns true for all numeric, |
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120 logical and character 2-D or N-D matrices. Previously, `ismatrix' |
| 10292 | 121 returned false if the first or second dimension was zero. |
| 122 Hence, `ismatrix ([])' was false, | |
| 123 while `ismatrix (zeros (1,2,0))' was true. | |
| 9873 | 124 |
| 10118 | 125 * The `issquare' function now returns a logical scalar, and is |
| 126 equivalent to the expression | |
| 127 | |
| 128 ismatrix (x) && ndims (x) == 2 && rows (x) == columns (x) | |
| 129 | |
| 130 The dimension is no longer returned. As a result, `issquare ([])' | |
| 131 now yields true. | |
| 9873 | 132 |
| 10118 | 133 * The `issymmetric' function now checks for symmetry instead of |
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134 Hermitianness. For the latter, ishermitian was created. Also, |
| 10118 | 135 logical scalar is returned rather than the dimension, so |
| 136 `issymmetric ([])' is now true. | |
| 9873 | 137 |
| 10118 | 138 ** Function handles are now aware of overloaded functions. If a |
| 139 function is overloaded, the handle determines at the time of its | |
| 140 reference which function to call. A non-overloaded version does not | |
| 141 need to exist. | |
| 9873 | 142 |
| 10118 | 143 ** Overloading functions for built-in classes (double, int8, cell, |
| 144 etc.) is now compatible with Matlab. | |
| 9408 | 145 |
| 10323 | 146 ** Function handles can now be compared with the == and != operators, |
| 147 as well as the `isequal' function. | |
| 148 | |
| 10118 | 149 ** Performance of concatenation (using []) and the functions `cat', |
| 150 `horzcat', and `vertcat' has been improved for multidimensional | |
| 151 arrays. | |
| 10117 | 152 |
| 9547 | 153 ** The operation-assignment operators +=, -=, *= and /= now behave more |
| 10118 | 154 efficiently in certain cases. For instance, if M is a matrix and S a |
| 155 scalar, then the statement | |
| 9547 | 156 |
| 10118 | 157 M += S; |
| 9547 | 158 |
| 10118 | 159 will operate on M's data in-place if it is not shared by another |
| 160 variable, usually increasing both time and memory efficiency. | |
| 9547 | 161 |
| 9558 | 162 Only selected common combinations are affected, namely: |
| 9547 | 163 |
| 164 matrix += matrix | |
| 165 matrix -= matrix | |
| 9558 | 166 matrix .*= matrix |
| 167 matrix ./= matrix | |
| 168 | |
| 9547 | 169 matrix += scalar |
| 170 matrix -= scalar | |
| 171 matrix *= scalar | |
| 172 matrix /= scalar | |
| 9558 | 173 |
| 9552 | 174 logical matrix |= logical matrix |
| 175 logical matrix &= logical matrix | |
| 9547 | 176 |
| 10118 | 177 where matrix and scalar belong to the same class. The left-hand |
| 178 side must be a simple variable reference. | |
| 9888 | 179 |
| 10118 | 180 Moreover, when unary operators occur in expressions, Octave will |
| 181 also try to do the operation in-place if it's argument is a | |
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182 temporary expression. |
| 9589 | 183 |
| 10118 | 184 ** The effect of comparison operators (<, >, <=, and >=) applied to |
| 185 complex numbers has changed to be consistent with the strict | |
| 186 ordering defined by the `max', `min', and `sort' functions. More | |
| 187 specifically, complex numbers are compared by lexicographical | |
| 188 comparison of the pairs `[abs(z), arg(z)]'. Previously, only real | |
| 189 parts were compared; this can be trivially achieved by wrapping the | |
| 190 operands in real(). | |
| 9547 | 191 |
| 10118 | 192 ** The automatic simplification of complex computation results has |
| 193 changed. Octave will now simplify any complex number with a zero | |
| 194 imaginary part or any complex matrix with all elements having zero | |
| 195 imaginary part to a real value. Previously, this was done only for | |
| 196 positive zeros. Note that the behavior of the complex function is | |
| 197 unchanged and it still produces a complex value even if the | |
| 198 imaginary part is zero. | |
| 9826 | 199 |
| 10118 | 200 ** As a side effect of code refactoring in liboctave, the binary |
| 201 logical operations are now more easily amenable to compiler | |
| 202 optimizations and are thus significantly faster. | |
| 9595 | 203 |
| 10118 | 204 ** Octave now allows user-defined `subsasgn' methods to optimize out |
| 205 redundant copies. For more information, see the manual. | |
| 9595 | 206 |
| 10453 | 207 ** More efficient matrix division handling. Octave is now able to |
| 10118 | 208 handle the expressions |
| 9664 | 209 |
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210 M' \ V |
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211 M.' \ V |
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212 V / M |
| 9664 | 213 |
| 10118 | 214 (M is a matrix and V is a vector) more efficiently in certain cases. |
| 215 In particular, if M is triangular, all three expressions will be | |
| 216 handled by a single call to xTRTRS (from LAPACK), with appropriate | |
| 10453 | 217 flags. Previously, all three expressions required a physical |
| 10118 | 218 transpose of M. |
| 9664 | 219 |
| 10118 | 220 ** More efficient handling of certain mixed real-complex matrix |
| 221 operations. For instance, if RM is a real matrix and CM a complex | |
| 222 matrix, | |
| 9664 | 223 |
| 10118 | 224 RM * CM |
| 9664 | 225 |
| 226 can now be evaluated either as | |
| 227 | |
| 228 complex (RM * real (CM), RM * imag (CM)) | |
| 229 | |
| 230 or as | |
| 231 | |
| 232 complex (RM) * CM, | |
| 233 | |
| 10453 | 234 depending on the dimensions. The first form requires more |
| 235 temporaries and copying, but halves the FLOP count, which normally | |
| 236 brings better performance if RM has enough rows. Previously, the | |
| 237 second form was always used. | |
| 9664 | 238 |
| 11111 | 239 Matrix division is similarly affected. |
| 9664 | 240 |
| 10118 | 241 ** More efficient handling of triangular matrix factors returned from |
| 242 factorizations. The functions for computing QR, LU and Cholesky | |
| 243 factorizations will now automatically return the triangular matrix | |
| 244 factors with proper internal matrix_type set, so that it won't need | |
| 245 to be computed when the matrix is used for division. | |
| 9717 | 246 |
| 10118 | 247 ** The built-in `sum' function now handles the non-native summation |
| 248 (i.e., double precision sum of single or integer inputs) more | |
| 249 efficiently, avoiding a temporary conversion of the whole input | |
| 250 array to doubles. Further, `sum' can now accept an extra option | |
| 251 argument, using a compensated summation algorithm rather than a | |
| 252 straightforward sum, which significantly improves precision if lots | |
| 253 of cancellation occurs in the summation. | |
| 9717 | 254 |
| 10118 | 255 ** The built-in `bsxfun' function now uses optimized code for certain |
| 256 cases where built-in operator handles are passed in. Namely, the | |
| 257 optimizations concern the operators `plus', `minus', `times', | |
| 258 `ldivide', `rdivide', `power', `and', `or' (for logical arrays), | |
| 259 the relational operators `eq', `ne', `lt', `le', `gt', `ge', and the | |
| 260 functions `min' and `max'. Optimizations only apply when both | |
| 261 operands are of the same built-in class. Mixed real/complex and | |
| 262 single/double operations will first convert both operands to a | |
| 263 common type. | |
| 9745 | 264 |
| 10118 | 265 ** The `strfind' and `strrep' functions now have compiled |
| 266 implementations, facilitating significantly more efficient searching | |
| 267 and replacing in strings, especially with longer patterns. The code | |
| 268 of `strcat' has been vectorized and is now much more efficient when | |
| 269 many strings are concatenated. The `strcmpi' and `strncmpi' | |
| 270 functions are now built-in functions, providing better performance. | |
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271 |
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272 ** 'str2double' now has a compiled implementation and the API conforms |
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273 to Matlab. The additional Octave-specific features of returning a |
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274 boolean matrix indicating which elements were successfully converted |
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275 has been removed. |
| 10208 | 276 |
| 10453 | 277 ** Matlab-style ignoring input and output function arguments using |
| 11111 | 278 tilde (~) is now supported. Ignored output arguments may be |
| 279 detected from a function using the built-in function `isargout'. | |
| 280 For more details, consult the manual. | |
| 10886 | 281 |
| 10453 | 282 ** The list datatype, deprecated since the introduction of cells, has |
| 283 been removed. | |
| 10276 | 284 |
| 10453 | 285 ** The accumarray function has been optimized and is now significantly |
| 286 faster in certain important cases. | |
| 10054 | 287 |
| 10292 | 288 ** The behavior of isreal and isnumeric functions was changed to be more |
| 289 Matlab-compatible. | |
| 290 | |
| 10406 | 291 ** The integer math & conversion warnings (Octave:int-convert-nan, |
| 292 Octave:int-convert-non-int-val, Octave:int-convert-overflow, | |
| 11111 | 293 Octave:int-math-overflow) have been removed. |
| 10406 | 294 |
| 10453 | 295 ** rem and mod are now built-in functions. They also handle integer |
| 296 types efficiently using integer arithmetic. | |
| 10437 | 297 |
| 10536 | 298 ** Sparse indexing and indexed assignment has been mostly rewritten. |
| 299 Since Octave uses compressed column storage for sparse matrices, | |
| 300 major attention is devoted to operations manipulating whole columns. | |
| 301 Such operations are now significantly faster, as well as some other | |
| 302 important cases. | |
| 303 | |
| 304 Further, it is now possible to pre-allocate a sparse matrix and | |
| 305 subsequently fill it by assignments, provided they meet certain | |
| 306 conditions. For more information, consult the `spalloc' function, | |
| 307 which is no longer a mere dummy. Consequently, nzmax and nnz are no | |
| 11111 | 308 longer always equal in Octave. Octave may also produce a matrix |
| 309 with nnz < nzmax as a result of other operations, so you should | |
| 310 consistently use nnz unless you really want to use nzmax (i.e. the | |
| 311 space allocated for nonzero elements). | |
| 10536 | 312 |
| 313 Sparse concatenation is also affected, and concatenating sparse | |
| 314 matrices, especially larger collections, is now significantly more | |
| 11111 | 315 efficient. This applies to both the [] operator and the |
| 10536 | 316 cat/vertcat/horzcat functions. |
| 317 | |
| 11111 | 318 ** It is now possible to optionally employ the xGESDD LAPACK drivers |
| 319 for computing the singular value decomposition using svd(), instead | |
| 320 of the default xGESVD, using the configuration pseudo-variable | |
| 321 svd_driver. The xGESDD driver can be up to 6x times faster when | |
| 322 singular vectors are requested, but is reported to be somewhat less | |
| 10639 | 323 robust on highly ill-conditioned matrices. |
| 324 | |
| 325 ** Configuration pseudo-variables, such as page_screen_output or | |
| 326 confirm_recursive_rmdir (or the above mentioned svd_driver), now | |
| 327 accept a "local" option as second argument, requesting the change | |
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328 to be undone when the current function returns: |
| 10639 | 329 |
| 330 function [status, msg] = rm_rf (dir) | |
| 331 confirm_recursive_rmdir (false, "local"); | |
| 332 [status, msg] = rmdir (dir, "s"); | |
| 333 ... | |
| 334 endfunction | |
| 335 | |
| 336 Upon return, confirm_recursive_rmdir will be restored to the value | |
| 337 it had on entry to the function, even if there were subsequent | |
| 338 changes to the variable in function rm_rf or any of the functions | |
| 339 it calls. | |
| 340 | |
| 11111 | 341 ** pkg now accepts a -forge option for downloading and installing |
| 342 packages from Octave Forge automatically. For example, | |
| 10774 | 343 |
| 344 pkg install -forge general | |
| 345 | |
| 11111 | 346 will automatically download the latest release of the general |
| 347 package and attempt to install it. No automatic resolving of | |
| 348 dependencies is provided. Further, | |
| 10639 | 349 |
| 10774 | 350 pkg list -forge |
| 351 | |
| 352 can be used to list all available packages. | |
| 353 | |
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354 ** The internal data representation of structs has been completely |
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355 rewritten to make certain optimizations feasible. The field data |
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356 can now be shared between structs with equal keys but different |
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357 dimensions or values, making operations that preserve the fields |
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358 faster. Economized storage is now used for scalar structs (just |
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359 like most other scalars), making their usage more |
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360 memory-efficient. Certain array-like operations on structs |
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361 (concatenation, uniform cellfun, num2cell) have gained a |
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362 significant speed-up. Additionally, the octave_scalar_map class |
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363 now provides a simpler interface to work with scalar structs within |
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364 a C++ DLD function. |
| 10639 | 365 |
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366 ** Two new formats are available for displaying numbers: |
| 11111 | 367 |
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368 format short eng |
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369 format long eng |
| 11111 | 370 |
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371 Both display numbers in engineering notation, i.e., mantissa + |
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372 exponent where the exponent is a multiple of 3. |
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373 |
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374 ** The following functions are new in Octave 3.4: |
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375 accumdim erfcx nfields pqpnonneg uigetdir |
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376 bitpack fileread nth_element quadcc uigetfile |
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377 bitunpack fminbnd onCleanup randi uiputfile |
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378 blkmm fskipl pbaspect repelems uimenu |
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379 cbrt ifelse pie3 reset whitebg |
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380 curl ishermitian powerset rsf2csf |
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381 chop isindex ppder saveas |
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382 daspect luupdate ppint strread |
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383 divergence merge ppjumps textread |
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384 |
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385 ** Using the image function to view images with external programs such |
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386 as display, xv, and xloadimage is no longer supported. The |
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387 image_viewer function has also been removed. |
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388 |
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389 ** The behavior of struct assignments to non-struct values has been |
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390 changed. Previously, it was possible to overwrite an arbitrary |
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391 value: |
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392 |
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393 a = 1; |
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394 a.x = 2; |
| 10873 | 395 |
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396 This is no longer possible unless a is an empty matrix or cell |
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397 array. |
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398 |
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399 ** The dlmread function has been extended to allow specifying a custom |
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400 value for empty fields. |
| 10829 | 401 |
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402 ** The dlmread and dlmwrite functions have been modified to accept |
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403 file IDs (as returned by fopen) in addition to file names. |
| 11111 | 404 |
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405 ** Octave can now optimize away the interpreter overhead of an |
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406 anonymous function handle, if the function simply calls another |
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407 function or handle with some of its parameters bound to certain |
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408 values. Example: |
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409 |
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410 f = @(x) sum (x, 1); |
| 10966 | 411 |
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412 When f is called, the call is forwarded to @sum with the constant 1 |
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413 appended, and the anonymous function call does not occur on the |
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414 call stack. |
| 10829 | 415 |
| 12424 | 416 ** For compatibility with Matlab, mu2lin (x) is now equivalent to |
| 417 mu2lin (x, 0). | |
| 418 | |
| 419 ** The new function `history_control' may be used to control the way | |
| 420 command lines are added to the history list when Octave is using | |
| 421 readline for command-line editing. For example | |
| 422 | |
| 423 history_control ("ignoredups") | |
| 424 | |
| 425 tells Octave to avoid adding duplicate lines to the history list. | |
| 426 | |
| 427 ** Octave now uses the gnulib library for improved portability and to | |
| 428 avoid bugs in operating system functions. | |
| 429 | |
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430 ** Deprecated functions. |
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431 |
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432 The following functions were deprecated in Octave 3.0 and have been |
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433 removed from Octave 3.4. |
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434 |
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435 beta_cdf geometric_pdf pascal_pdf |
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436 beta_inv geometric_rnd pascal_rnd |
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437 beta_pdf hypergeometric_cdf poisson_cdf |
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438 beta_rnd hypergeometric_inv poisson_inv |
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439 binomial_cdf hypergeometric_pdf poisson_pdf |
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440 binomial_inv hypergeometric_rnd poisson_rnd |
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441 binomial_pdf intersection polyinteg |
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442 binomial_rnd is_bool setstr |
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443 chisquare_cdf is_complex struct_contains |
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444 chisquare_inv is_list struct_elements |
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445 chisquare_pdf is_matrix t_cdf |
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446 chisquare_rnd is_scalar t_inv |
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447 clearplot is_square t_pdf |
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448 clg is_stream t_rnd |
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449 com2str is_struct uniform_cdf |
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450 exponential_cdf is_symmetric uniform_inv |
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451 exponential_inv is_vector uniform_pdf |
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452 exponential_pdf isstr uniform_rnd |
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453 exponential_rnd lognormal_cdf weibcdf |
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454 f_cdf lognormal_inv weibinv |
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455 f_inv lognormal_pdf weibpdf |
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456 f_pdf lognormal_rnd weibrnd |
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457 f_rnd meshdom weibull_cdf |
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458 gamma_cdf normal_cdf weibull_inv |
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459 gamma_inv normal_inv weibull_pdf |
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460 gamma_pdf normal_pdf weibull_rnd |
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461 gamma_rnd normal_rnd wiener_rnd |
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462 geometric_cdf pascal_cdf |
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463 geometric_inv pascal_inv |
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464 |
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465 The following functions were deprecated in Octave 3.2 and will |
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466 be removed from Octave 3.6 (or whatever version is the second major |
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467 release after 3.2): |
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468 |
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469 create_set spcholinv splu |
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470 dmult spcumprod spmax |
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471 iscommand spcumsum spmin |
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472 israwcommand spdet spprod |
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473 lchol spdiag spqr |
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474 loadimage spfind spsum |
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475 mark_as_command sphcat spsumsq |
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476 mark_as_rawcommand spinv spvcat |
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477 spatan2 spkron str2mat |
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478 spchol splchol unmark_command |
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479 spchol2inv split unmark_rawcommand |
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480 |
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481 The following functions have been deprecated in Octave 3.4 and will |
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482 be removed from Octave 3.8 (or whatever version is the second major |
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483 release after 3.4): |
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484 |
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485 autocor cellidx gammai krylovb saveimage |
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486 autocov dispatch glpkmex perror strerror |
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487 betai fstat is_global replot values |
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488 |
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489 Summary of important user-visible changes for version 3.2: |
| 5913 | 490 --------------------------------------------------------- |
| 2452 | 491 |
| 8737 | 492 ** Compatibility with Matlab graphics has been improved. |
| 6329 | 493 |
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494 The hggroup object and associated listener callback functions have |
| 8737 | 495 been added allowing the inclusion of group objects. Data sources |
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496 have been added to these group objects such that |
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497 |
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498 x = 0:0.1:10; |
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499 y = sin (x); |
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500 plot (x, y, "ydatasource", "y"); |
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501 for i = 1 : 100 |
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502 pause(0.1) |
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503 y = sin (x + 0.1 * i); |
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504 refreshdata(); |
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505 endfor |
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506 |
| 8737 | 507 works as expected. This capability has be used to introduce |
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508 stem-series, bar-series, etc., objects for better Matlab |
| 8737 | 509 compatibility. |
| 510 | |
| 511 ** New graphics functions: | |
| 512 | |
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513 addlistener ezcontour gcbo refresh |
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514 addproperty ezcontourf ginput refreshdata |
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515 allchild ezmesh gtext specular |
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516 available_graphics_toolkits ezmeshc intwarning surfl |
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517 graphics_toolkit ezplot ishghandle trisurf |
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518 cla ezplot3 isocolors waitforbuttonpress |
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519 clabel ezpolar isonormals |
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520 comet ezsurf isosurface |
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521 dellistener findall linkprop |
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522 diffuse gcbf plotmatrix |
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523 |
| 8737 | 524 ** New experimental OpenGL/FLTK based plotting system. |
| 525 | |
| 526 An experimental plotting system based on OpenGL and the FLTK | |
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527 toolkit is now part of Octave. This graphics toolkit is disabled by |
| 8737 | 528 default. You can switch to using it with the command |
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529 |
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530 graphics_toolkit ("fltk") |
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531 |
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532 for all future figures or for a particular figure with the command |
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533 |
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534 graphics_toolkit (h, "fltk") |
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535 |
| 11139 | 536 where "h" is a valid figure handle. |
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537 |
| 8737 | 538 ** Functions providing direct access to gnuplot have been removed. |
| 539 | |
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540 The functions __gnuplot_plot__, __gnuplot_set__, __gnuplot_raw__, |
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541 __gnuplot_show__, __gnuplot_replot__, __gnuplot_splot__, |
| 8737 | 542 __gnuplot_save_data__ and __gnuplot_send_inline_data__ have been |
| 543 removed from Octave. These function were incompatible with the | |
| 544 high level graphics handle code. | |
| 6329 | 545 |
| 8885 | 546 ** The Control, Finance and Quaternion functions have been removed. |
| 547 | |
| 548 These functions are now available as separate packages from | |
| 549 | |
| 550 http://octave.sourceforge.net/packages.html | |
| 551 | |
| 552 and can be reinstalled using the Octave package manager (see | |
| 553 the pkg function). | |
| 554 | |
| 555 ** Specific sparse matrix functions removed. | |
| 556 | |
| 557 The following functions, which handled only sparse matrices have | |
| 558 been removed. Instead of calling these functions directly, you | |
| 559 should use the corresponding function without the "sp" prefix. | |
| 8737 | 560 |
| 8885 | 561 spatan2 spcumsum spkron spprod |
| 562 spchol spdet splchol spqr | |
| 563 spchol2inv spdiag splu spsum | |
| 564 spcholinv spfind spmax spsumsqk | |
| 565 spcumprod spinv spmin | |
| 566 | |
| 567 ** Improvements to the debugger. | |
| 568 | |
| 569 The interactive debugging features have been improved. Stopping | |
| 570 on statements with dbstop should work correctly now. Stepping | |
| 571 into and over functions, and stepping one statement at a time | |
| 572 (with dbstep) now works. Moving up and down the call stack with | |
| 573 dbup and dbdown now works. The dbstack function is now available | |
| 574 to print the current function call stack. The new dbquit function | |
| 575 is available to exit the debugging mode. | |
| 576 | |
| 577 ** Improved traceback error messages. | |
| 578 | |
| 579 Traceback error messages are much more concise and easier to | |
| 580 understand. They now display information about the function call | |
| 581 stack instead of the stack of all statements that were active at | |
| 582 the point of the error. | |
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583 |
| 8737 | 584 ** Object Oriented Programming. |
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585 |
| 8737 | 586 Octave now includes OOP features and the user can create their own |
| 587 class objects and overloaded functions and operators. For | |
| 588 example, all methods of a class called "myclass" will be found in | |
| 589 a directory "@myclass" on the users path. The class specific | |
| 590 versions of functions and operators take precedence over the | |
| 591 generic versions of these functions. | |
| 592 | |
| 593 New functions related to OOP include | |
| 7189 | 594 |
| 8737 | 595 class inferiorto isobject loadobj methods superiorto |
| 596 | |
| 597 See the Octave manual for more details. | |
| 7038 | 598 |
| 8747 | 599 ** Parsing of Command-style Functions. |
| 600 | |
| 601 Octave now parses command-style functions without needing to first | |
| 602 declare them with "mark_as_command". The rules for recognizing a | |
| 603 command-style function calls are | |
| 604 | |
| 605 * A command must appear as the first word in a statement, | |
| 606 followed by a space. | |
| 607 | |
| 608 * The first character after the space must not be '=' or '(' | |
| 609 | |
| 610 * The next token after the space must not look like a binary | |
| 611 operator. | |
| 612 | |
| 613 These rules should be mostly compatible with the way Matlab parses | |
| 614 command-style function calls and allow users to define commands in | |
| 615 .m files without having to mark them as commands. | |
| 616 | |
| 617 Note that previous versions of Octave allowed expressions like | |
| 618 | |
| 619 x = load -text foo.dat | |
| 620 | |
| 621 but an expression like this will now generate a parse error. In | |
| 622 order to assign the value returned by a function to a variable, | |
| 623 you must use the normal function call syntax: | |
| 624 | |
| 625 x = load ("-text", "foo.dat"); | |
| 626 | |
| 8737 | 627 ** Block comments. |
| 628 | |
| 8747 | 629 Commented code can be between matching "#{" and "#}" or "%{" and |
| 630 "%}" markers, even if the commented code spans several line. This | |
| 631 allows blocks code to be commented, without needing to comment | |
| 632 each line. For example, | |
| 5814 | 633 |
| 8747 | 634 function [s, t] = func (x, y) |
| 635 s = 2 * x; | |
| 636 #{ | |
| 637 s *= y; | |
| 638 t = y + x; | |
| 639 #} | |
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640 endfunction |
| 5814 | 641 |
| 8747 | 642 the lines "s *= y;" and "t = y + x" will not be executed. |
| 8737 | 643 |
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644 ** If any subfunction in a file ends with "end" or "endfunction", then |
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645 they all must end that way. Previously, Octave accepted |
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646 |
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647 function main () |
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648 ... |
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649 # no endfunction here. |
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650 function sub () |
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651 ... |
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652 endfunction |
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653 |
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654 but this is no longer allowed. |
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655 |
| 8737 | 656 ** Special treatment in the parser of expressions like "a' * b". |
| 2452 | 657 |
| 8737 | 658 In these cases the transpose is no longer explicitly formed and |
| 659 BLAS libraries are called with the transpose flagged, | |
| 660 significantly improving performance for these kinds of | |
| 661 operations. | |
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662 |
| 8737 | 663 ** Single Precision data type. |
| 2452 | 664 |
| 8737 | 665 Octave now includes a single precision data type. Single |
| 666 precision variables can be created with the "single" command, or | |
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667 from functions like ones, eye, etc. For example, |
| 5995 | 668 |
| 8737 | 669 single (1) |
| 670 ones (2, 2, "single") | |
| 671 zeros (2, 2, "single") | |
| 672 eye (2, 2, "single") | |
| 673 Inf (2, 2, "single") | |
| 674 NaN (2, 2, "single") | |
| 675 NA (2, 2, "single") | |
| 7279 | 676 |
| 8737 | 677 all create single precision variables. For compatibility with |
| 678 Matlab, mixed double/single precision operators and functions | |
| 679 return single precision types. | |
| 680 | |
| 681 As a consequence of this addition to Octave the internal | |
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682 representation of the double precision NA value has changed, and |
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683 so users that make use of data generated by Octave with R or |
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684 visa-versa are warned that compatibility might not be assured. |
| 7279 | 685 |
| 8737 | 686 ** Improved array indexing. |
| 687 | |
| 688 The underlying code used for indexing of arrays has been | |
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689 completely rewritten and indexing is now significantly faster. |
| 8737 | 690 |
| 8755 | 691 ** Improved memory management. |
| 692 | |
| 693 Octave will now attempt to share data in some cases where previously | |
| 694 a copy would be made, such as certain array slicing operations or | |
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695 conversions between cells, structs and cs-lists. This usually reduces |
| 8755 | 696 both time and memory consumption. |
| 9128 | 697 Also, Octave will now attempt to detect and optimize usage of a vector |
| 698 as a stack, when elements are being repeatedly inserted at/removed from | |
| 699 the end of the vector. | |
| 8755 | 700 |
| 8738 | 701 ** Improved performance for reduction operations. |
| 702 | |
| 8755 | 703 The performance of the sum, prod, sumsq, cumsum, cumprod, any, all, |
| 704 max and min functions has been significantly improved. | |
| 8738 | 705 |
| 9006 | 706 ** Sorting and searching. |
| 707 | |
| 708 The performance of sort has been improved, especially when sorting | |
| 10453 | 709 indices are requested. An efficient built-in issorted |
| 710 implementation was added. The sortrows function now uses a more | |
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711 efficient algorithm, especially in the homogeneous case. The lookup |
| 10453 | 712 function is now a built-in function performing a binary search, |
| 713 optimized for long runs of close elements. Lookup also works with | |
| 714 cell arrays of strings. | |
| 9006 | 715 |
| 716 ** Range arithmetics | |
| 717 | |
| 10453 | 718 For some operations on ranges, Octave will attempt to keep the |
| 719 result as a range. These include negation, adding a scalar, | |
| 720 subtracting a scalar, and multiplying by a scalar. Ranges with zero | |
| 721 increment are allowed and can be constructed using the built-in | |
| 722 function `ones'. | |
| 9006 | 723 |
| 724 ** Various performance improvements. | |
| 725 | |
| 10453 | 726 Performance of a number of other built-in operations and functions |
| 727 was improved, including: | |
| 9006 | 728 |
| 729 * logical operations | |
| 730 * comparison operators | |
| 731 * element-wise power | |
| 732 * accumarray | |
| 733 * cellfun | |
| 734 * isnan | |
| 735 * isinf | |
| 736 * isfinite | |
| 737 * nchoosek | |
| 738 * repmat | |
| 739 * strcmp | |
| 740 | |
| 8737 | 741 ** 64-bit integer arithmetic. |
| 742 | |
| 743 Arithmetic with 64-bit integers (int64 and uint64 types) is fully | |
| 744 supported, with saturation semantics like the other integer types. | |
| 745 Performance of most integer arithmetic operations has been | |
| 746 improved by using integer arithmetic directly. Previously, Octave | |
| 747 performed integer math with saturation semantics by converting the | |
| 748 operands to double precision, performing the operation, and then | |
| 749 converting the result back to an integer value, truncating if | |
| 750 necessary. | |
| 751 | |
| 8885 | 752 ** Diagonal and permutation matrices. |
| 753 | |
| 754 The interpreter can now treat diagonal and permutation matrices as | |
| 755 special objects that store only the non-zero elements, rather than | |
| 756 general full matrices. Therefore, it is now possible to construct | |
| 757 and use these matrices in linear algebra without suffering a | |
| 758 performance penalty due to storing large numbers of zero elements. | |
| 759 | |
| 760 ** Improvements to fsolve. | |
| 761 | |
| 762 The fsolve function now accepts an option structure argument (see | |
| 763 also the optimset function). The INFO values returned from fsolve | |
| 764 have changed to be compatible with Matlab's fsolve function. | |
| 765 Additionally, fsolve is now able to solve overdetermined systems, | |
| 766 complex-differentiable complex systems, systems with a sparse | |
| 767 jacobian and can work in single precision if given single precision | |
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768 inputs. It can also be called recursively. |
| 8885 | 769 |
| 8737 | 770 ** Improvements to the norm function. |
| 771 | |
| 772 The norm function is now able to compute row or column norms of a | |
| 773 matrix in a single call, as well as general matrix p-norms. | |
| 774 | |
| 775 ** New functions for computing some eigenvalues or singular values. | |
| 776 | |
| 777 The eigs and svds functions have been included in Octave. These | |
| 778 functions require the ARPACK library (now distributed under a | |
| 779 GPL-compatible license). | |
| 780 | |
| 781 ** New QR and Cholesky factorization updating functions. | |
|
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782 |
| 8737 | 783 choldelete cholshift qrdelete qrshift |
| 784 cholinsert cholupdate qrinsert qrupdate | |
| 785 | |
| 786 ** New quadrature functions. | |
| 787 | |
| 788 dblquad quadgk quadv triplequad | |
| 789 | |
| 8885 | 790 ** New functions for reading and writing images. |
| 791 | |
| 792 The imwrite and imread functions have been included in Octave. | |
| 793 These functions require the GraphicsMagick library. The new | |
| 794 function imfinfo provides information about an image file (size, | |
| 795 type, colors, etc.) | |
| 796 | |
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797 ** The input_event_hook function has been replaced by the pair of |
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798 functions add_input_event_hook and remove_input_event_hook so that |
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799 more than one hook function may be installed at a time. |
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allow multiple input event hook functions to be installed simultaneously
John W. Eaton <jwe@octave.org>
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9128
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changeset
|
800 |
| 8737 | 801 ** Other miscellaneous new functions. |
|
8370
34960ba08a81
document more new features in the NEWS file
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|
802 |
|
8932
2d0f8692a82e
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Soren Hauberg <hauberg@gmail.com>
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803 addtodate hypot reallog |
|
2d0f8692a82e
Add the 'histc' function
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|
804 bicgstab idivide realpow |
| 9006 | 805 cellslices info realsqrt |
| 806 cgs interp1q rectint | |
| 807 command_line_path isdebugmode regexptranslate | |
| 808 contrast isfloat restoredefaultpath | |
| 809 convn isstrprop roundb | |
| 810 cummin log1p rundemos | |
| 811 cummax lsqnonneg runlength | |
| 812 datetick matlabroot saveobj | |
| 813 display namelengthmax spaugment | |
| 814 expm1 nargoutchk strchr | |
| 815 filemarker pathdef strvcat | |
| 816 fstat perl subspace | |
| 817 full prctile symvar | |
| 818 fzero quantile treelayout | |
| 819 genvarname re_read_readline_init_file validatestring | |
| 820 histc | |
|
8370
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|
821 |
| 8885 | 822 ** Changes to strcat. |
| 823 | |
| 824 The strcat function is now compatible with Matlab's strcat | |
| 825 function, which removes trailing whitespace when concatenating | |
| 826 character strings. For example | |
| 827 | |
| 828 strcat ('foo ', 'bar') | |
| 829 ==> 'foobar' | |
| 830 | |
| 831 The new function cstrcat provides the previous behavior of | |
| 832 Octave's strcat. | |
| 833 | |
| 834 ** Improvements to the help functions. | |
| 835 | |
|
9034
52515efc50c0
Documentation cleanup on NEWS file
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9031
diff
changeset
|
836 The help system has been mostly re-implemented in .m files to make |
| 8885 | 837 it easier to modify. Performance of the lookfor function has been |
| 838 greatly improved by caching the help text from all functions that | |
| 839 are distributed with Octave. The pkg function has been modified | |
| 840 to generate cache files for external packages when they are | |
| 841 installed. | |
| 842 | |
|
8888
0c7b0049c023
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|
843 ** Deprecated functions. |
|
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844 |
|
0c7b0049c023
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|
845 The following functions were deprecated in Octave 3.0 and will be |
|
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846 removed from Octave 3.4 (or whatever version is the second major |
|
8888
0c7b0049c023
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|
847 release after 3.0): |
|
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848 |
|
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8ea4cf59c41b
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|
849 beta_cdf geometric_pdf pascal_pdf |
|
8ea4cf59c41b
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|
850 beta_inv geometric_rnd pascal_rnd |
|
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|
851 beta_pdf hypergeometric_cdf poisson_cdf |
|
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|
852 beta_rnd hypergeometric_inv poisson_inv |
|
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|
853 binomial_cdf hypergeometric_pdf poisson_pdf |
|
8ea4cf59c41b
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|
854 binomial_inv hypergeometric_rnd poisson_rnd |
|
8ea4cf59c41b
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|
855 binomial_pdf intersection polyinteg |
|
8ea4cf59c41b
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|
856 binomial_rnd is_bool setstr |
|
8ea4cf59c41b
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|
857 chisquare_cdf is_complex struct_contains |
|
8ea4cf59c41b
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|
858 chisquare_inv is_list struct_elements |
|
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|
859 chisquare_pdf is_matrix t_cdf |
|
8ea4cf59c41b
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|
860 chisquare_rnd is_scalar t_inv |
|
8ea4cf59c41b
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|
861 clearplot is_square t_pdf |
|
8ea4cf59c41b
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John W. Eaton <jwe@octave.org>
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|
862 clg is_stream t_rnd |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
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|
863 com2str is_struct uniform_cdf |
|
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|
864 exponential_cdf is_symmetric uniform_inv |
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8ea4cf59c41b
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|
865 exponential_inv is_vector uniform_pdf |
|
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|
866 exponential_pdf isstr uniform_rnd |
|
8ea4cf59c41b
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|
867 exponential_rnd lognormal_cdf weibcdf |
|
8ea4cf59c41b
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|
868 f_cdf lognormal_inv weibinv |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
John W. Eaton <jwe@octave.org>
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|
869 f_inv lognormal_pdf weibpdf |
|
8ea4cf59c41b
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870 f_pdf lognormal_rnd weibrnd |
|
8ea4cf59c41b
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|
871 f_rnd meshdom weibull_cdf |
|
8ea4cf59c41b
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|
872 gamma_cdf normal_cdf weibull_inv |
|
8ea4cf59c41b
list deprecated and removed functions in NEWS file
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|
873 gamma_inv normal_inv weibull_pdf |
|
8ea4cf59c41b
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874 gamma_pdf normal_pdf weibull_rnd |
|
8ea4cf59c41b
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875 gamma_rnd normal_rnd wiener_rnd |
|
8888
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|
876 geometric_cdf pascal_cdf |
|
0c7b0049c023
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|
877 geometric_inv pascal_inv |
|
0c7b0049c023
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|
878 |
|
0c7b0049c023
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parents:
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|
879 The following functions are now deprecated in Octave 3.2 and will |
|
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|
880 be removed from Octave 3.6 (or whatever version is the second major |
|
8888
0c7b0049c023
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|
881 release after 3.2): |
|
0c7b0049c023
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|
882 |
|
0c7b0049c023
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changeset
|
883 create_set spcholinv spmax |
|
0c7b0049c023
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|
884 dmult spcumprod spmin |
|
0c7b0049c023
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|
885 iscommand spcumsum spprod |
|
0c7b0049c023
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|
886 israwcommand spdet spqr |
|
0c7b0049c023
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|
887 lchol spdiag spsum |
|
0c7b0049c023
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|
888 loadimage spfind spsumsq |
|
0c7b0049c023
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|
889 mark_as_command spinv str2mat |
|
0c7b0049c023
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|
890 mark_as_rawcommand spkron unmark_command |
|
0c7b0049c023
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|
891 spatan2 splchol unmark_rawcommand |
|
0c7b0049c023
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|
892 spchol split |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
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|
893 spchol2inv splu |
|
0c7b0049c023
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|
894 |
|
7990
86dae6e5b83c
Initial update of NEWS for 3.2 release
David Bateman <dbateman@free.fr>
parents:
7279
diff
changeset
|
895 See NEWS.3 for old news. |