Mercurial > hg > octave-max
annotate NEWS @ 12586:f9b7aa3b88f8
Deprecate studentize(), replace with zscore().
| author | Rik <octave@nomad.inbox5.com> |
|---|---|
| date | Fri, 08 Apr 2011 20:15:19 -0700 |
| parents | 89604fa96d2f |
| children | 0e79664b969c |
| rev | line source |
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1 Summary of important user-visible changes for version 3.6: |
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2 --------------------------------------------------------- |
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3 |
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4 ** The PCRE library is now required to build Octave. |
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5 |
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6 ** New functions added. |
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7 |
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8 iscolumn |
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9 issrow |
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10 zscore |
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11 |
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12 ** Deprecated functions. |
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13 |
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14 The following functions were deprecated in Octave 3.2 and have been |
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15 removed from Octave 3.6. |
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16 |
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17 create_set spcholinv splu |
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18 dmult spcumprod spmax |
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19 iscommand spcumsum spmin |
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20 israwcommand spdet spprod |
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21 lchol spdiag spqr |
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22 loadimage spfind spsum |
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23 mark_as_command sphcat spsumsq |
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24 mark_as_rawcommand spinv spvcat |
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25 spatan2 spkron str2mat |
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26 spchol splchol unmark_command |
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27 spchol2inv split unmark_rawcommand |
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28 |
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29 The following functions have been deprecated in Octave 3.6 and will |
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30 be removed from Octave 3.10 (or whatever version is the second major |
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31 release after 3.6): |
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32 |
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33 is_duplicate_entry |
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Rik <octave@nomad.inbox5.com>
parents:
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34 studentize |
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parents:
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35 |
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36 |
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37 Summary of important user-visible changes for version 3.4: |
| 9352 | 38 --------------------------------------------------------- |
| 39 | |
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40 ** BLAS and LAPACK libraries are now required to build Octave. The |
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41 subset of the reference BLAS and LAPACK libraries has been removed |
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42 from the Octave sources. |
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43 |
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44 ** The ARPACK library is now distributed with Octave so it no longer |
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45 needs to be available as an external dependency when building |
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46 Octave. |
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47 |
| 10118 | 48 ** The `lookup' function was extended to be more useful for |
| 49 general-purpose binary searching. Using this improvement, the | |
| 50 ismember function was rewritten for significantly better | |
| 51 performance. | |
| 9352 | 52 |
| 53 ** Real, integer and logical matrices, when used in indexing, will now | |
| 54 cache the internal index_vector value (zero-based indices) when | |
| 55 successfully used as indices, eliminating the conversion penalty for | |
| 10118 | 56 subsequent indexing by the same matrix. In particular, this means it |
| 57 is no longer needed to avoid repeated indexing by logical arrays | |
| 58 using find for performance reasons. | |
| 9888 | 59 |
| 10118 | 60 ** Logical matrices are now treated more efficiently when used as |
| 61 indices. Octave will keep the index as a logical mask unless the | |
| 62 ratio of true elements is small enough, using a specialized | |
| 63 code. Previously, all logical matrices were always first converted | |
| 64 to index vectors. This results in savings in both memory and | |
| 65 computing time. | |
| 9480 | 66 |
| 10118 | 67 ** The `sub2ind' and `ind2sub' functions were reimplemented as compiled |
| 68 functions for better performance. These functions are now faster, | |
| 69 can deliver more economized results for ranges, and can reuse the | |
| 70 index cache mechanism described in previous paragraph. | |
| 71 | |
| 72 ** The built-in function equivalents to associative operators (`plus', | |
| 73 `times', `mtimes', `and', and `or') have been extended to accept | |
| 74 multiple arguments. This is especially useful for summing | |
| 75 (multiplying, etc.) lists of objects (of possibly distinct types): | |
| 9408 | 76 |
| 9449 | 77 matrix_sum = plus (matrix_list{:}); |
| 78 | |
| 10118 | 79 ** An FTP object type based on libcurl has been implemented. These |
| 80 objects allow ftp connections, downloads and uploads to be | |
| 81 managed. For example, | |
| 9880 | 82 |
| 10118 | 83 fp = ftp ("ftp.octave.org); |
| 84 cd (fp, "gnu/octave"); | |
| 85 mget (fp, "octave-3.2.3.tar.bz2"); | |
| 86 close (fp); | |
| 9880 | 87 |
| 10118 | 88 ** The default behavior of `assert (observed, expected)' has been |
| 89 relaxed to employ less strict checking that does not require the | |
| 90 internals of the values to match. This avoids previously valid | |
| 91 tests from breaking due to new internal classes introduced in future | |
| 92 Octave versions. | |
| 9449 | 93 |
| 94 For instance, all of these assertions were true in Octave 3.0.x | |
| 95 but false in 3.2.x due to new optimizations and improvements: | |
| 96 | |
| 97 assert (2*linspace (1, 5, 5), 2*(1:5)) | |
| 98 assert (zeros (0, 0), []) | |
| 99 assert (2*ones (1, 5), (2) (ones (1,5))) | |
| 9462 | 100 |
| 10118 | 101 ** The behavior of library functions `ismatrix', `issquare', and |
| 102 `issymmetric' has been changed for better consistency. | |
| 9873 | 103 |
| 10292 | 104 * The `ismatrix' function now returns true for all numeric, |
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105 logical and character 2-D or N-D matrices. Previously, `ismatrix' |
| 10292 | 106 returned false if the first or second dimension was zero. |
| 107 Hence, `ismatrix ([])' was false, | |
| 108 while `ismatrix (zeros (1,2,0))' was true. | |
| 9873 | 109 |
| 10118 | 110 * The `issquare' function now returns a logical scalar, and is |
| 111 equivalent to the expression | |
| 112 | |
| 113 ismatrix (x) && ndims (x) == 2 && rows (x) == columns (x) | |
| 114 | |
| 115 The dimension is no longer returned. As a result, `issquare ([])' | |
| 116 now yields true. | |
| 9873 | 117 |
| 10118 | 118 * The `issymmetric' function now checks for symmetry instead of |
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119 Hermitianness. For the latter, ishermitian was created. Also, |
| 10118 | 120 logical scalar is returned rather than the dimension, so |
| 121 `issymmetric ([])' is now true. | |
| 9873 | 122 |
| 10118 | 123 ** Function handles are now aware of overloaded functions. If a |
| 124 function is overloaded, the handle determines at the time of its | |
| 125 reference which function to call. A non-overloaded version does not | |
| 126 need to exist. | |
| 9873 | 127 |
| 10118 | 128 ** Overloading functions for built-in classes (double, int8, cell, |
| 129 etc.) is now compatible with Matlab. | |
| 9408 | 130 |
| 10323 | 131 ** Function handles can now be compared with the == and != operators, |
| 132 as well as the `isequal' function. | |
| 133 | |
| 10118 | 134 ** Performance of concatenation (using []) and the functions `cat', |
| 135 `horzcat', and `vertcat' has been improved for multidimensional | |
| 136 arrays. | |
| 10117 | 137 |
| 9547 | 138 ** The operation-assignment operators +=, -=, *= and /= now behave more |
| 10118 | 139 efficiently in certain cases. For instance, if M is a matrix and S a |
| 140 scalar, then the statement | |
| 9547 | 141 |
| 10118 | 142 M += S; |
| 9547 | 143 |
| 10118 | 144 will operate on M's data in-place if it is not shared by another |
| 145 variable, usually increasing both time and memory efficiency. | |
| 9547 | 146 |
| 9558 | 147 Only selected common combinations are affected, namely: |
| 9547 | 148 |
| 149 matrix += matrix | |
| 150 matrix -= matrix | |
| 9558 | 151 matrix .*= matrix |
| 152 matrix ./= matrix | |
| 153 | |
| 9547 | 154 matrix += scalar |
| 155 matrix -= scalar | |
| 156 matrix *= scalar | |
| 157 matrix /= scalar | |
| 9558 | 158 |
| 9552 | 159 logical matrix |= logical matrix |
| 160 logical matrix &= logical matrix | |
| 9547 | 161 |
| 10118 | 162 where matrix and scalar belong to the same class. The left-hand |
| 163 side must be a simple variable reference. | |
| 9888 | 164 |
| 10118 | 165 Moreover, when unary operators occur in expressions, Octave will |
| 166 also try to do the operation in-place if it's argument is a | |
| 167 temporary expresssion. | |
| 9589 | 168 |
| 10118 | 169 ** The effect of comparison operators (<, >, <=, and >=) applied to |
| 170 complex numbers has changed to be consistent with the strict | |
| 171 ordering defined by the `max', `min', and `sort' functions. More | |
| 172 specifically, complex numbers are compared by lexicographical | |
| 173 comparison of the pairs `[abs(z), arg(z)]'. Previously, only real | |
| 174 parts were compared; this can be trivially achieved by wrapping the | |
| 175 operands in real(). | |
| 9547 | 176 |
| 10118 | 177 ** The automatic simplification of complex computation results has |
| 178 changed. Octave will now simplify any complex number with a zero | |
| 179 imaginary part or any complex matrix with all elements having zero | |
| 180 imaginary part to a real value. Previously, this was done only for | |
| 181 positive zeros. Note that the behavior of the complex function is | |
| 182 unchanged and it still produces a complex value even if the | |
| 183 imaginary part is zero. | |
| 9826 | 184 |
| 10118 | 185 ** As a side effect of code refactoring in liboctave, the binary |
| 186 logical operations are now more easily amenable to compiler | |
| 187 optimizations and are thus significantly faster. | |
| 9595 | 188 |
| 10118 | 189 ** Octave now allows user-defined `subsasgn' methods to optimize out |
| 190 redundant copies. For more information, see the manual. | |
| 9595 | 191 |
| 10453 | 192 ** More efficient matrix division handling. Octave is now able to |
| 10118 | 193 handle the expressions |
| 9664 | 194 |
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195 M' \ V |
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196 M.' \ V |
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197 V / M |
| 9664 | 198 |
| 10118 | 199 (M is a matrix and V is a vector) more efficiently in certain cases. |
| 200 In particular, if M is triangular, all three expressions will be | |
| 201 handled by a single call to xTRTRS (from LAPACK), with appropriate | |
| 10453 | 202 flags. Previously, all three expressions required a physical |
| 10118 | 203 transpose of M. |
| 9664 | 204 |
| 10118 | 205 ** More efficient handling of certain mixed real-complex matrix |
| 206 operations. For instance, if RM is a real matrix and CM a complex | |
| 207 matrix, | |
| 9664 | 208 |
| 10118 | 209 RM * CM |
| 9664 | 210 |
| 211 can now be evaluated either as | |
| 212 | |
| 213 complex (RM * real (CM), RM * imag (CM)) | |
| 214 | |
| 215 or as | |
| 216 | |
| 217 complex (RM) * CM, | |
| 218 | |
| 10453 | 219 depending on the dimensions. The first form requires more |
| 220 temporaries and copying, but halves the FLOP count, which normally | |
| 221 brings better performance if RM has enough rows. Previously, the | |
| 222 second form was always used. | |
| 9664 | 223 |
| 11111 | 224 Matrix division is similarly affected. |
| 9664 | 225 |
| 10118 | 226 ** More efficient handling of triangular matrix factors returned from |
| 227 factorizations. The functions for computing QR, LU and Cholesky | |
| 228 factorizations will now automatically return the triangular matrix | |
| 229 factors with proper internal matrix_type set, so that it won't need | |
| 230 to be computed when the matrix is used for division. | |
| 9717 | 231 |
| 10118 | 232 ** The built-in `sum' function now handles the non-native summation |
| 233 (i.e., double precision sum of single or integer inputs) more | |
| 234 efficiently, avoiding a temporary conversion of the whole input | |
| 235 array to doubles. Further, `sum' can now accept an extra option | |
| 236 argument, using a compensated summation algorithm rather than a | |
| 237 straightforward sum, which significantly improves precision if lots | |
| 238 of cancellation occurs in the summation. | |
| 9717 | 239 |
| 10118 | 240 ** The built-in `bsxfun' function now uses optimized code for certain |
| 241 cases where built-in operator handles are passed in. Namely, the | |
| 242 optimizations concern the operators `plus', `minus', `times', | |
| 243 `ldivide', `rdivide', `power', `and', `or' (for logical arrays), | |
| 244 the relational operators `eq', `ne', `lt', `le', `gt', `ge', and the | |
| 245 functions `min' and `max'. Optimizations only apply when both | |
| 246 operands are of the same built-in class. Mixed real/complex and | |
| 247 single/double operations will first convert both operands to a | |
| 248 common type. | |
| 9745 | 249 |
| 10118 | 250 ** The `strfind' and `strrep' functions now have compiled |
| 251 implementations, facilitating significantly more efficient searching | |
| 252 and replacing in strings, especially with longer patterns. The code | |
| 253 of `strcat' has been vectorized and is now much more efficient when | |
| 254 many strings are concatenated. The `strcmpi' and `strncmpi' | |
| 255 functions are now built-in functions, providing better performance. | |
| 10208 | 256 |
| 10453 | 257 ** Matlab-style ignoring input and output function arguments using |
| 11111 | 258 tilde (~) is now supported. Ignored output arguments may be |
| 259 detected from a function using the built-in function `isargout'. | |
| 260 For more details, consult the manual. | |
| 10886 | 261 |
| 10453 | 262 ** The list datatype, deprecated since the introduction of cells, has |
| 263 been removed. | |
| 10276 | 264 |
| 10453 | 265 ** The accumarray function has been optimized and is now significantly |
| 266 faster in certain important cases. | |
| 10054 | 267 |
| 10292 | 268 ** The behavior of isreal and isnumeric functions was changed to be more |
| 269 Matlab-compatible. | |
| 270 | |
| 10406 | 271 ** The integer math & conversion warnings (Octave:int-convert-nan, |
| 272 Octave:int-convert-non-int-val, Octave:int-convert-overflow, | |
| 11111 | 273 Octave:int-math-overflow) have been removed. |
| 10406 | 274 |
| 10453 | 275 ** rem and mod are now built-in functions. They also handle integer |
| 276 types efficiently using integer arithmetic. | |
| 10437 | 277 |
| 10536 | 278 ** Sparse indexing and indexed assignment has been mostly rewritten. |
| 279 Since Octave uses compressed column storage for sparse matrices, | |
| 280 major attention is devoted to operations manipulating whole columns. | |
| 281 Such operations are now significantly faster, as well as some other | |
| 282 important cases. | |
| 283 | |
| 284 Further, it is now possible to pre-allocate a sparse matrix and | |
| 285 subsequently fill it by assignments, provided they meet certain | |
| 286 conditions. For more information, consult the `spalloc' function, | |
| 287 which is no longer a mere dummy. Consequently, nzmax and nnz are no | |
| 11111 | 288 longer always equal in Octave. Octave may also produce a matrix |
| 289 with nnz < nzmax as a result of other operations, so you should | |
| 290 consistently use nnz unless you really want to use nzmax (i.e. the | |
| 291 space allocated for nonzero elements). | |
| 10536 | 292 |
| 293 Sparse concatenation is also affected, and concatenating sparse | |
| 294 matrices, especially larger collections, is now significantly more | |
| 11111 | 295 efficient. This applies to both the [] operator and the |
| 10536 | 296 cat/vertcat/horzcat functions. |
| 297 | |
| 11111 | 298 ** It is now possible to optionally employ the xGESDD LAPACK drivers |
| 299 for computing the singular value decomposition using svd(), instead | |
| 300 of the default xGESVD, using the configuration pseudo-variable | |
| 301 svd_driver. The xGESDD driver can be up to 6x times faster when | |
| 302 singular vectors are requested, but is reported to be somewhat less | |
| 10639 | 303 robust on highly ill-conditioned matrices. |
| 304 | |
| 305 ** Configuration pseudo-variables, such as page_screen_output or | |
| 306 confirm_recursive_rmdir (or the above mentioned svd_driver), now | |
| 307 accept a "local" option as second argument, requesting the change | |
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308 to be undone when the current function returns: |
| 10639 | 309 |
| 310 function [status, msg] = rm_rf (dir) | |
| 311 confirm_recursive_rmdir (false, "local"); | |
| 312 [status, msg] = rmdir (dir, "s"); | |
| 313 ... | |
| 314 endfunction | |
| 315 | |
| 316 Upon return, confirm_recursive_rmdir will be restored to the value | |
| 317 it had on entry to the function, even if there were subsequent | |
| 318 changes to the variable in function rm_rf or any of the functions | |
| 319 it calls. | |
| 320 | |
| 11111 | 321 ** pkg now accepts a -forge option for downloading and installing |
| 322 packages from Octave Forge automatically. For example, | |
| 10774 | 323 |
| 324 pkg install -forge general | |
| 325 | |
| 11111 | 326 will automatically download the latest release of the general |
| 327 package and attempt to install it. No automatic resolving of | |
| 328 dependencies is provided. Further, | |
| 10639 | 329 |
| 10774 | 330 pkg list -forge |
| 331 | |
| 332 can be used to list all available packages. | |
| 333 | |
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334 ** The internal data representation of structs has been completely |
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335 rewritten to make certain optimizations feasible. The field data |
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336 can now be shared between structs with equal keys but different |
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337 dimensions or values, making operations that preserve the fields |
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338 faster. Economized storage is now used for scalar structs (just |
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339 like most other scalars), making their usage more |
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340 memory-efficient. Certain array-like operations on structs |
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341 (concatenation, uniform cellfun, num2cell) have gained a |
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342 significant speed-up. Additionally, the octave_scalar_map class |
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343 now provides a simpler interface to work with scalar structs within |
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344 a C++ DLD function. |
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346 ** Two new formats are available for displaying numbers: |
| 11111 | 347 |
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348 format short eng |
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349 format long eng |
| 11111 | 350 |
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351 Both display numbers in engineering notation, i.e., mantissa + |
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352 exponent where the exponent is a multiple of 3. |
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353 |
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354 ** The following functions are new in Octave 3.4: |
| 10829 | 355 |
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356 accumdim erfcx nfields pqpnonneg uigetdir |
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357 bitpack fileread nth_element quadcc uigetfile |
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358 bitunpack fminbnd onCleanup randi uiputfile |
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359 blkmm fskipl pbaspect repelems uimenu |
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360 cbrt ifelse pie3 reset whitebg |
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361 curl ishermitian powerset rsf2csf |
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362 chop isindex ppder saveas |
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363 daspect luupdate ppint strread |
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364 divergence merge ppjumps textread |
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365 |
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366 ** Using the image function to view images with external programs such |
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367 as display, xv, and xloadimage is no longer supported. The |
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368 image_viewer function has also been removed. |
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369 |
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370 ** The behavior of struct assignments to non-struct values has been |
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371 changed. Previously, it was possible to overwrite an arbitrary |
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372 value: |
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373 |
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374 a = 1; |
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375 a.x = 2; |
| 10873 | 376 |
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377 This is no longer possible unless a is an empty matrix or cell |
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378 array. |
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379 |
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380 ** The dlmread function has been extended to allow specifying a custom |
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381 value for empty fields. |
| 10829 | 382 |
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383 ** The dlmread and dlmwrite functions have been modified to accept |
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384 file IDs (as returned by fopen) in addition to file names. |
| 11111 | 385 |
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386 ** Octave can now optimize away the interpreter overhead of an |
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387 anonymous function handle, if the function simply calls another |
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388 function or handle with some of its parameters bound to certain |
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389 values. Example: |
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390 |
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391 f = @(x) sum (x, 1); |
| 10966 | 392 |
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393 When f is called, the call is forwarded to @sum with the constant 1 |
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394 appended, and the anonymous function call does not occur on the |
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395 call stack. |
| 10829 | 396 |
| 12424 | 397 ** For compatibility with Matlab, mu2lin (x) is now equivalent to |
| 398 mu2lin (x, 0). | |
| 399 | |
| 400 ** The new function `history_control' may be used to control the way | |
| 401 command lines are added to the history list when Octave is using | |
| 402 readline for command-line editing. For example | |
| 403 | |
| 404 history_control ("ignoredups") | |
| 405 | |
| 406 tells Octave to avoid adding duplicate lines to the history list. | |
| 407 | |
| 408 ** Octave now uses the gnulib library for improved portability and to | |
| 409 avoid bugs in operating system functions. | |
| 410 | |
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411 ** Deprecated functions. |
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412 |
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413 The following functions were deprecated in Octave 3.0 and have been |
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414 removed from Octave 3.4. |
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415 |
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416 beta_cdf geometric_pdf pascal_pdf |
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417 beta_inv geometric_rnd pascal_rnd |
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418 beta_pdf hypergeometric_cdf poisson_cdf |
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419 beta_rnd hypergeometric_inv poisson_inv |
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420 binomial_cdf hypergeometric_pdf poisson_pdf |
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421 binomial_inv hypergeometric_rnd poisson_rnd |
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422 binomial_pdf intersection polyinteg |
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423 binomial_rnd is_bool setstr |
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424 chisquare_cdf is_complex struct_contains |
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425 chisquare_inv is_list struct_elements |
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426 chisquare_pdf is_matrix t_cdf |
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427 chisquare_rnd is_scalar t_inv |
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428 clearplot is_square t_pdf |
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429 clg is_stream t_rnd |
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430 com2str is_struct uniform_cdf |
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431 exponential_cdf is_symmetric uniform_inv |
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432 exponential_inv is_vector uniform_pdf |
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433 exponential_pdf isstr uniform_rnd |
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434 exponential_rnd lognormal_cdf weibcdf |
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435 f_cdf lognormal_inv weibinv |
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436 f_inv lognormal_pdf weibpdf |
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437 f_pdf lognormal_rnd weibrnd |
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438 f_rnd meshdom weibull_cdf |
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439 gamma_cdf normal_cdf weibull_inv |
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440 gamma_inv normal_inv weibull_pdf |
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441 gamma_pdf normal_pdf weibull_rnd |
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442 gamma_rnd normal_rnd wiener_rnd |
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443 geometric_cdf pascal_cdf |
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444 geometric_inv pascal_inv |
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445 |
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446 The following functions were deprecated in Octave 3.2 and will |
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447 be removed from Octave 3.6 (or whatever version is the second major |
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448 release after 3.2): |
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449 |
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450 create_set spcholinv splu |
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451 dmult spcumprod spmax |
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452 iscommand spcumsum spmin |
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453 israwcommand spdet spprod |
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454 lchol spdiag spqr |
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455 loadimage spfind spsum |
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456 mark_as_command sphcat spsumsq |
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457 mark_as_rawcommand spinv spvcat |
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458 spatan2 spkron str2mat |
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459 spchol splchol unmark_command |
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460 spchol2inv split unmark_rawcommand |
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461 |
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462 The following functions have been deprecated in Octave 3.4 and will |
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463 be removed from Octave 3.8 (or whatever version is the second major |
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464 release after 3.4): |
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465 |
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466 autocor cellidx fstat is_global replot values |
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467 autocov cquad gammai krylovb saveimage |
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468 betai dispatch glpkmex perror strerror |
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469 |
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470 Summary of important user-visible changes for version 3.2: |
| 5913 | 471 --------------------------------------------------------- |
| 2452 | 472 |
| 8737 | 473 ** Compatibility with Matlab graphics has been improved. |
| 6329 | 474 |
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475 The hggroup object and associated listener callback functions have |
| 8737 | 476 been added allowing the inclusion of group objects. Data sources |
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477 have been added to these group objects such that |
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478 |
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479 x = 0:0.1:10; |
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480 y = sin (x); |
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481 plot (x, y, "ydatasource", "y"); |
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482 for i = 1 : 100 |
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483 pause(0.1) |
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484 y = sin (x + 0.1 * i); |
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485 refreshdata(); |
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486 endfor |
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487 |
| 8737 | 488 works as expected. This capability has be used to introduce |
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489 stem-series, bar-series, etc., objects for better Matlab |
| 8737 | 490 compatibility. |
| 491 | |
| 492 ** New graphics functions: | |
| 493 | |
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494 addlistener ezcontour gcbo refresh |
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495 addproperty ezcontourf ginput refreshdata |
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496 allchild ezmesh gtext specular |
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497 available_graphics_toolkits ezmeshc intwarning surfl |
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498 graphics_toolkit ezplot ishghandle trisurf |
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499 cla ezplot3 isocolors waitforbuttonpress |
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500 clabel ezpolar isonormals |
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501 comet ezsurf isosurface |
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502 dellistener findall linkprop |
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503 diffuse gcbf plotmatrix |
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504 |
| 8737 | 505 ** New experimental OpenGL/FLTK based plotting system. |
| 506 | |
| 507 An experimental plotting system based on OpenGL and the FLTK | |
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508 toolkit is now part of Octave. This graphics toolkit is disabled by |
| 8737 | 509 default. You can switch to using it with the command |
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510 |
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511 graphics_toolkit ("fltk") |
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512 |
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513 for all future figures or for a particular figure with the command |
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514 |
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515 graphics_toolkit (h, "fltk") |
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516 |
| 11139 | 517 where "h" is a valid figure handle. |
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518 |
| 8737 | 519 ** Functions providing direct access to gnuplot have been removed. |
| 520 | |
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521 The functions __gnuplot_plot__, __gnuplot_set__, __gnuplot_raw__, |
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522 __gnuplot_show__, __gnuplot_replot__, __gnuplot_splot__, |
| 8737 | 523 __gnuplot_save_data__ and __gnuplot_send_inline_data__ have been |
| 524 removed from Octave. These function were incompatible with the | |
| 525 high level graphics handle code. | |
| 6329 | 526 |
| 8885 | 527 ** The Control, Finance and Quaternion functions have been removed. |
| 528 | |
| 529 These functions are now available as separate packages from | |
| 530 | |
| 531 http://octave.sourceforge.net/packages.html | |
| 532 | |
| 533 and can be reinstalled using the Octave package manager (see | |
| 534 the pkg function). | |
| 535 | |
| 536 ** Specific sparse matrix functions removed. | |
| 537 | |
| 538 The following functions, which handled only sparse matrices have | |
| 539 been removed. Instead of calling these functions directly, you | |
| 540 should use the corresponding function without the "sp" prefix. | |
| 8737 | 541 |
| 8885 | 542 spatan2 spcumsum spkron spprod |
| 543 spchol spdet splchol spqr | |
| 544 spchol2inv spdiag splu spsum | |
| 545 spcholinv spfind spmax spsumsqk | |
| 546 spcumprod spinv spmin | |
| 547 | |
| 548 ** Improvements to the debugger. | |
| 549 | |
| 550 The interactive debugging features have been improved. Stopping | |
| 551 on statements with dbstop should work correctly now. Stepping | |
| 552 into and over functions, and stepping one statement at a time | |
| 553 (with dbstep) now works. Moving up and down the call stack with | |
| 554 dbup and dbdown now works. The dbstack function is now available | |
| 555 to print the current function call stack. The new dbquit function | |
| 556 is available to exit the debugging mode. | |
| 557 | |
| 558 ** Improved traceback error messages. | |
| 559 | |
| 560 Traceback error messages are much more concise and easier to | |
| 561 understand. They now display information about the function call | |
| 562 stack instead of the stack of all statements that were active at | |
| 563 the point of the error. | |
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564 |
| 8737 | 565 ** Object Oriented Programming. |
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566 |
| 8737 | 567 Octave now includes OOP features and the user can create their own |
| 568 class objects and overloaded functions and operators. For | |
| 569 example, all methods of a class called "myclass" will be found in | |
| 570 a directory "@myclass" on the users path. The class specific | |
| 571 versions of functions and operators take precedence over the | |
| 572 generic versions of these functions. | |
| 573 | |
| 574 New functions related to OOP include | |
| 7189 | 575 |
| 8737 | 576 class inferiorto isobject loadobj methods superiorto |
| 577 | |
| 578 See the Octave manual for more details. | |
| 7038 | 579 |
| 8747 | 580 ** Parsing of Command-style Functions. |
| 581 | |
| 582 Octave now parses command-style functions without needing to first | |
| 583 declare them with "mark_as_command". The rules for recognizing a | |
| 584 command-style function calls are | |
| 585 | |
| 586 * A command must appear as the first word in a statement, | |
| 587 followed by a space. | |
| 588 | |
| 589 * The first character after the space must not be '=' or '(' | |
| 590 | |
| 591 * The next token after the space must not look like a binary | |
| 592 operator. | |
| 593 | |
| 594 These rules should be mostly compatible with the way Matlab parses | |
| 595 command-style function calls and allow users to define commands in | |
| 596 .m files without having to mark them as commands. | |
| 597 | |
| 598 Note that previous versions of Octave allowed expressions like | |
| 599 | |
| 600 x = load -text foo.dat | |
| 601 | |
| 602 but an expression like this will now generate a parse error. In | |
| 603 order to assign the value returned by a function to a variable, | |
| 604 you must use the normal function call syntax: | |
| 605 | |
| 606 x = load ("-text", "foo.dat"); | |
| 607 | |
| 8737 | 608 ** Block comments. |
| 609 | |
| 8747 | 610 Commented code can be between matching "#{" and "#}" or "%{" and |
| 611 "%}" markers, even if the commented code spans several line. This | |
| 612 allows blocks code to be commented, without needing to comment | |
| 613 each line. For example, | |
| 5814 | 614 |
| 8747 | 615 function [s, t] = func (x, y) |
| 616 s = 2 * x; | |
| 617 #{ | |
| 618 s *= y; | |
| 619 t = y + x; | |
| 620 #} | |
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621 endfunction |
| 5814 | 622 |
| 8747 | 623 the lines "s *= y;" and "t = y + x" will not be executed. |
| 8737 | 624 |
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625 ** If any subfunction in a file ends with "end" or "endfunction", then |
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626 they all must end that way. Previously, Octave accepted |
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627 |
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628 function main () |
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629 ... |
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630 # no endfunction here. |
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631 function sub () |
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632 ... |
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633 endfunction |
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634 |
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635 but this is no longer allowed. |
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636 |
| 8737 | 637 ** Special treatment in the parser of expressions like "a' * b". |
| 2452 | 638 |
| 8737 | 639 In these cases the transpose is no longer explicitly formed and |
| 640 BLAS libraries are called with the transpose flagged, | |
| 641 significantly improving performance for these kinds of | |
| 642 operations. | |
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643 |
| 8737 | 644 ** Single Precision data type. |
| 2452 | 645 |
| 8737 | 646 Octave now includes a single precision data type. Single |
| 647 precision variables can be created with the "single" command, or | |
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648 from functions like ones, eye, etc. For example, |
| 5995 | 649 |
| 8737 | 650 single (1) |
| 651 ones (2, 2, "single") | |
| 652 zeros (2, 2, "single") | |
| 653 eye (2, 2, "single") | |
| 654 Inf (2, 2, "single") | |
| 655 NaN (2, 2, "single") | |
| 656 NA (2, 2, "single") | |
| 7279 | 657 |
| 8737 | 658 all create single precision variables. For compatibility with |
| 659 Matlab, mixed double/single precision operators and functions | |
| 660 return single precision types. | |
| 661 | |
| 662 As a consequence of this addition to Octave the internal | |
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663 representation of the double precision NA value has changed, and |
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664 so users that make use of data generated by Octave with R or |
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665 visa-versa are warned that compatibility might not be assured. |
| 7279 | 666 |
| 8737 | 667 ** Improved array indexing. |
| 668 | |
| 669 The underlying code used for indexing of arrays has been | |
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670 completely rewritten and indexing is now significantly faster. |
| 8737 | 671 |
| 8755 | 672 ** Improved memory management. |
| 673 | |
| 674 Octave will now attempt to share data in some cases where previously | |
| 675 a copy would be made, such as certain array slicing operations or | |
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676 conversions between cells, structs and cs-lists. This usually reduces |
| 8755 | 677 both time and memory consumption. |
| 9128 | 678 Also, Octave will now attempt to detect and optimize usage of a vector |
| 679 as a stack, when elements are being repeatedly inserted at/removed from | |
| 680 the end of the vector. | |
| 8755 | 681 |
| 8738 | 682 ** Improved performance for reduction operations. |
| 683 | |
| 8755 | 684 The performance of the sum, prod, sumsq, cumsum, cumprod, any, all, |
| 685 max and min functions has been significantly improved. | |
| 8738 | 686 |
| 9006 | 687 ** Sorting and searching. |
| 688 | |
| 689 The performance of sort has been improved, especially when sorting | |
| 10453 | 690 indices are requested. An efficient built-in issorted |
| 691 implementation was added. The sortrows function now uses a more | |
| 692 efficient algorithm, especially in the homegeneous case. The lookup | |
| 693 function is now a built-in function performing a binary search, | |
| 694 optimized for long runs of close elements. Lookup also works with | |
| 695 cell arrays of strings. | |
| 9006 | 696 |
| 697 ** Range arithmetics | |
| 698 | |
| 10453 | 699 For some operations on ranges, Octave will attempt to keep the |
| 700 result as a range. These include negation, adding a scalar, | |
| 701 subtracting a scalar, and multiplying by a scalar. Ranges with zero | |
| 702 increment are allowed and can be constructed using the built-in | |
| 703 function `ones'. | |
| 9006 | 704 |
| 705 ** Various performance improvements. | |
| 706 | |
| 10453 | 707 Performance of a number of other built-in operations and functions |
| 708 was improved, including: | |
| 9006 | 709 |
| 710 * logical operations | |
| 711 * comparison operators | |
| 712 * element-wise power | |
| 713 * accumarray | |
| 714 * cellfun | |
| 715 * isnan | |
| 716 * isinf | |
| 717 * isfinite | |
| 718 * nchoosek | |
| 719 * repmat | |
| 720 * strcmp | |
| 721 | |
| 8737 | 722 ** 64-bit integer arithmetic. |
| 723 | |
| 724 Arithmetic with 64-bit integers (int64 and uint64 types) is fully | |
| 725 supported, with saturation semantics like the other integer types. | |
| 726 Performance of most integer arithmetic operations has been | |
| 727 improved by using integer arithmetic directly. Previously, Octave | |
| 728 performed integer math with saturation semantics by converting the | |
| 729 operands to double precision, performing the operation, and then | |
| 730 converting the result back to an integer value, truncating if | |
| 731 necessary. | |
| 732 | |
| 8885 | 733 ** Diagonal and permutation matrices. |
| 734 | |
| 735 The interpreter can now treat diagonal and permutation matrices as | |
| 736 special objects that store only the non-zero elements, rather than | |
| 737 general full matrices. Therefore, it is now possible to construct | |
| 738 and use these matrices in linear algebra without suffering a | |
| 739 performance penalty due to storing large numbers of zero elements. | |
| 740 | |
| 741 ** Improvements to fsolve. | |
| 742 | |
| 743 The fsolve function now accepts an option structure argument (see | |
| 744 also the optimset function). The INFO values returned from fsolve | |
| 745 have changed to be compatible with Matlab's fsolve function. | |
| 746 Additionally, fsolve is now able to solve overdetermined systems, | |
| 747 complex-differentiable complex systems, systems with a sparse | |
| 748 jacobian and can work in single precision if given single precision | |
|
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749 inputs. It can also be called recursively. |
| 8885 | 750 |
| 8737 | 751 ** Improvements to the norm function. |
| 752 | |
| 753 The norm function is now able to compute row or column norms of a | |
| 754 matrix in a single call, as well as general matrix p-norms. | |
| 755 | |
| 756 ** New functions for computing some eigenvalues or singular values. | |
| 757 | |
| 758 The eigs and svds functions have been included in Octave. These | |
| 759 functions require the ARPACK library (now distributed under a | |
| 760 GPL-compatible license). | |
| 761 | |
| 762 ** New QR and Cholesky factorization updating functions. | |
|
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763 |
| 8737 | 764 choldelete cholshift qrdelete qrshift |
| 765 cholinsert cholupdate qrinsert qrupdate | |
| 766 | |
| 767 ** New quadrature functions. | |
| 768 | |
| 769 dblquad quadgk quadv triplequad | |
| 770 | |
| 8885 | 771 ** New functions for reading and writing images. |
| 772 | |
| 773 The imwrite and imread functions have been included in Octave. | |
| 774 These functions require the GraphicsMagick library. The new | |
| 775 function imfinfo provides information about an image file (size, | |
| 776 type, colors, etc.) | |
| 777 | |
|
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778 ** The input_event_hook function has been replaced by the pair of |
|
1500d0197484
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779 functions add_input_event_hook and remove_input_event_hook so that |
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780 more than one hook function may be installed at a time. |
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|
781 |
| 8737 | 782 ** Other miscellaneous new functions. |
|
8370
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|
783 |
|
8932
2d0f8692a82e
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784 addtodate hypot reallog |
|
2d0f8692a82e
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|
785 bicgstab idivide realpow |
| 9006 | 786 cellslices info realsqrt |
| 787 cgs interp1q rectint | |
| 788 command_line_path isdebugmode regexptranslate | |
| 789 contrast isfloat restoredefaultpath | |
| 790 convn isstrprop roundb | |
| 791 cummin log1p rundemos | |
| 792 cummax lsqnonneg runlength | |
| 793 datetick matlabroot saveobj | |
| 794 display namelengthmax spaugment | |
| 795 expm1 nargoutchk strchr | |
| 796 filemarker pathdef strvcat | |
| 797 fstat perl subspace | |
| 798 full prctile symvar | |
| 799 fzero quantile treelayout | |
| 800 genvarname re_read_readline_init_file validatestring | |
| 801 histc | |
|
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802 |
| 8885 | 803 ** Changes to strcat. |
| 804 | |
| 805 The strcat function is now compatible with Matlab's strcat | |
| 806 function, which removes trailing whitespace when concatenating | |
| 807 character strings. For example | |
| 808 | |
| 809 strcat ('foo ', 'bar') | |
| 810 ==> 'foobar' | |
| 811 | |
| 812 The new function cstrcat provides the previous behavior of | |
| 813 Octave's strcat. | |
| 814 | |
| 815 ** Improvements to the help functions. | |
| 816 | |
|
9034
52515efc50c0
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817 The help system has been mostly re-implemented in .m files to make |
| 8885 | 818 it easier to modify. Performance of the lookfor function has been |
| 819 greatly improved by caching the help text from all functions that | |
| 820 are distributed with Octave. The pkg function has been modified | |
| 821 to generate cache files for external packages when they are | |
| 822 installed. | |
| 823 | |
|
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824 ** Deprecated functions. |
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825 |
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826 The following functions were deprecated in Octave 3.0 and will be |
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827 removed from Octave 3.4 (or whatever version is the second major |
|
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828 release after 3.0): |
|
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829 |
|
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830 beta_cdf geometric_pdf pascal_pdf |
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831 beta_inv geometric_rnd pascal_rnd |
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832 beta_pdf hypergeometric_cdf poisson_cdf |
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833 beta_rnd hypergeometric_inv poisson_inv |
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834 binomial_cdf hypergeometric_pdf poisson_pdf |
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835 binomial_inv hypergeometric_rnd poisson_rnd |
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836 binomial_pdf intersection polyinteg |
|
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|
837 binomial_rnd is_bool setstr |
|
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|
838 chisquare_cdf is_complex struct_contains |
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|
839 chisquare_inv is_list struct_elements |
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|
840 chisquare_pdf is_matrix t_cdf |
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841 chisquare_rnd is_scalar t_inv |
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842 clearplot is_square t_pdf |
|
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843 clg is_stream t_rnd |
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|
844 com2str is_struct uniform_cdf |
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|
845 exponential_cdf is_symmetric uniform_inv |
|
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846 exponential_inv is_vector uniform_pdf |
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847 exponential_pdf isstr uniform_rnd |
|
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|
848 exponential_rnd lognormal_cdf weibcdf |
|
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849 f_cdf lognormal_inv weibinv |
|
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850 f_inv lognormal_pdf weibpdf |
|
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|
851 f_pdf lognormal_rnd weibrnd |
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852 f_rnd meshdom weibull_cdf |
|
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853 gamma_cdf normal_cdf weibull_inv |
|
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|
854 gamma_inv normal_inv weibull_pdf |
|
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855 gamma_pdf normal_pdf weibull_rnd |
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|
856 gamma_rnd normal_rnd wiener_rnd |
|
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|
857 geometric_cdf pascal_cdf |
|
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|
858 geometric_inv pascal_inv |
|
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|
859 |
|
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|
860 The following functions are now deprecated in Octave 3.2 and will |
|
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|
861 be removed from Octave 3.6 (or whatever version is the second major |
|
8888
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|
862 release after 3.2): |
|
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|
863 |
|
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|
864 create_set spcholinv spmax |
|
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|
865 dmult spcumprod spmin |
|
0c7b0049c023
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866 iscommand spcumsum spprod |
|
0c7b0049c023
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|
867 israwcommand spdet spqr |
|
0c7b0049c023
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868 lchol spdiag spsum |
|
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869 loadimage spfind spsumsq |
|
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|
870 mark_as_command spinv str2mat |
|
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871 mark_as_rawcommand spkron unmark_command |
|
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|
872 spatan2 splchol unmark_rawcommand |
|
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873 spchol split |
|
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|
874 spchol2inv splu |
|
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|
875 |
|
7990
86dae6e5b83c
Initial update of NEWS for 3.2 release
David Bateman <dbateman@free.fr>
parents:
7279
diff
changeset
|
876 See NEWS.3 for old news. |