Mercurial > hg > octave-jordi
annotate NEWS @ 10054:8f7f325fa678
update NEWS
| author | Jaroslav Hajek <highegg@gmail.com> |
|---|---|
| date | Mon, 04 Jan 2010 12:32:07 +0100 |
| parents | cee6c63cff32 |
| children | a8de53a88e07 |
| rev | line source |
|---|---|
| 9352 | 1 Summary of important user-visible changes for version 3.3: |
| 2 --------------------------------------------------------- | |
| 3 | |
|
9799
cfd0aa788ae1
remove reference blas and lapack sources
John W. Eaton <jwe@octave.org>
parents:
9745
diff
changeset
|
4 ** BLAS and LAPACK libraries are now required to build Octave. The |
|
cfd0aa788ae1
remove reference blas and lapack sources
John W. Eaton <jwe@octave.org>
parents:
9745
diff
changeset
|
5 subset of the reference BLAS and LAPACK libraries has been removed |
|
cfd0aa788ae1
remove reference blas and lapack sources
John W. Eaton <jwe@octave.org>
parents:
9745
diff
changeset
|
6 from the Octave sources. |
|
cfd0aa788ae1
remove reference blas and lapack sources
John W. Eaton <jwe@octave.org>
parents:
9745
diff
changeset
|
7 |
| 9352 | 8 ** The `lookup' function was extended to be more useful for general-purpose |
| 9 binary searching. Using this improvement, the ismember function was | |
|
9407
0951174cbb03
remove experimental stuff from lookup, simplify
Jaroslav Hajek <highegg@gmail.com>
parents:
9365
diff
changeset
|
10 rewritten for significantly better performance. |
| 9352 | 11 |
| 12 ** Real, integer and logical matrices, when used in indexing, will now | |
| 13 cache the internal index_vector value (zero-based indices) when | |
| 14 successfully used as indices, eliminating the conversion penalty for | |
| 15 subsequent indexing by the same matrix. In particular, this means it is | |
| 16 no longer needed to avoid repeated indexing by logical arrays using | |
| 17 `find' for performance reasons. | |
| 18 | |
| 9888 | 19 ** Logical matrices are now treated more efficiently when used as indices. |
| 20 Octave will keep the index as a logical mask unless the ratio of true | |
| 21 elements is small enough, using a specialized code. Previously, all logical | |
| 22 matrices were always first converted to index vectors. This results in | |
| 23 savings in both memory and computing time. | |
| 24 | |
| 9480 | 25 ** sub2ind and ind2sub were reimplemented as compiled functions for better |
| 26 performance. These functions are now faster, can deliver more economized | |
| 27 results for ranges, and can reuse the index cache mechanism described in | |
| 28 previous paragraph. | |
| 29 | |
| 9449 | 30 ** The built-in function equivalents to associative operators (plus, times, |
| 31 mtimes, and, or) have been extended to accept multiple arguments. This | |
| 32 is especially useful for summing (multiplying, etc.) lists of objects | |
| 33 (of possibly distinct types): | |
| 9408 | 34 |
| 9449 | 35 matrix_sum = plus (matrix_list{:}); |
| 36 | |
| 9880 | 37 ** An FTP object type based on libcurl has been implemented. These objects |
| 38 allow ftp connections, downloads and uploads to be managed. An example of | |
| 39 its use might be | |
| 40 | |
| 41 fp = ftp ("ftp.octave.org); | |
| 42 cd (fp, "gnu/octave"); | |
| 43 mget (fp, "octave-3.2.3.tar.bz2"); | |
| 44 close (fp); | |
| 45 | |
| 9449 | 46 ** The default behavior of assert (observed, expected) has been relaxed |
| 47 to employ less strict checking that does not require the internals | |
| 48 of the values to match. This avoids previously valid tests from | |
| 49 breaking due to new internal classes introduced in future Octave | |
| 50 versions. | |
| 51 | |
| 52 For instance, all of these assertions were true in Octave 3.0.x | |
| 53 but false in 3.2.x due to new optimizations and improvements: | |
| 54 | |
| 55 assert (2*linspace (1, 5, 5), 2*(1:5)) | |
| 56 assert (zeros (0, 0), []) | |
| 57 assert (2*ones (1, 5), (2) (ones (1,5))) | |
| 9462 | 58 |
| 9873 | 59 ** The behavior of library functions ismatrix, issquare and issymmetric has |
| 60 been changed for better consistency. | |
| 61 | |
| 62 * ismatrix now returns true for all numeric and logical 2d or Nd matrices. | |
| 63 Previously, ismatrix returned false if the first or second dimension was | |
| 64 zero. Hence, `ismatrix ([])' was false, while `ismatrix (zeros (1,2,0))' | |
| 65 was true. | |
| 66 | |
| 67 * issquare now returns a logical scalar, and is equivalent to the expression | |
| 68 `ismatrix (x) && ndims (x) == 2 && rows (x) == columns (x)'. The dimension | |
| 69 is no longer returned. As a result, `issquare ([])' now yields true. | |
| 70 | |
| 71 * issymmetric now checks for symmetry instead of hermitianness. For the latter, | |
| 72 ishermitian was created. Also, logical scalar is returned rather than the | |
| 73 dimension, so `issymmetric ([])' is now true. | |
| 74 | |
| 75 | |
| 9462 | 76 ** Function handles are now aware of overloaded functions. If a function |
| 77 is overloaded, the handle determines at the time of its reference which | |
| 78 function to call. A non-overloaded version does not need to exist. | |
| 9408 | 79 |
| 9547 | 80 ** The operation-assignment operators +=, -=, *= and /= now behave more |
| 81 efficiently in certain cases. For instance, if m is a matrix and s | |
| 82 a scalar, then the statement | |
| 83 | |
| 84 m += s; | |
| 85 | |
| 86 will operate on m's data in-place if it is not shared by another variable, | |
| 87 usually increasing both time and memory efficiency. | |
| 88 | |
| 9558 | 89 Only selected common combinations are affected, namely: |
| 9547 | 90 |
| 91 matrix += matrix | |
| 92 matrix -= matrix | |
| 9558 | 93 matrix .*= matrix |
| 94 matrix ./= matrix | |
| 95 | |
| 9547 | 96 matrix += scalar |
| 97 matrix -= scalar | |
| 98 matrix *= scalar | |
| 99 matrix /= scalar | |
| 9558 | 100 |
| 9552 | 101 logical matrix |= logical matrix |
| 102 logical matrix &= logical matrix | |
| 9547 | 103 |
| 9888 | 104 where matrix and scalar belong to the same class. The left-hand side must be |
| 105 a simple variable reference. | |
| 106 | |
| 107 Moreover, when unary operators occur in expressions, Octave will also try to do | |
| 108 the operation in-place if it's argument is a temporary expresssion. | |
| 9589 | 109 |
| 110 ** The effect of comparison operators (<,>,<=,>=) when applied to complex numbers | |
| 111 has changed to be consistent with the strict ordering defined by max, min and sort. | |
| 112 More specifically, complex numbers are compared by lexicographical comparison of | |
| 113 the pairs [abs(z), arg(z)]. Previously, only real parts were compared; this can be | |
| 114 trivially achieved by wrapping the operands in real(). | |
| 9547 | 115 |
| 9826 | 116 ** The automatic simplification of complex computation results has changed. Octave will |
| 117 now simplify any complex number with a zero imaginary part or any complex matrix | |
| 118 with all elements having zero imaginary part to a real value. Previously, this was done | |
| 119 only for positive zeros. | |
| 120 Note that the behavior of the `complex' function is unchanged and it still | |
| 121 produces a complex value even if the imaginary part is zero. | |
| 122 | |
| 9595 | 123 ** As a side effect of code refactoring in liboctave, the binary logical operations |
| 124 are now more easily amenable to compiler optimizations and are thus significantly | |
| 125 faster. | |
| 126 | |
| 127 ** Octave now allows user-defined subsasgn methods to optimize out redundant copies. | |
| 128 For more information, see the manual. | |
| 129 | |
| 9664 | 130 ** More efficient matrix division handling. Octave is now able to handle the expressions |
| 131 | |
| 132 M' \ v | |
| 133 M.' \ v | |
| 134 v / M | |
| 135 | |
| 136 (M is a matrix and v is a vector) more efficiently in certain cases. | |
| 137 In particular, if M is triangular, all three expressions will be handled by a single call to | |
| 138 xTRTRS, with appropriate flags. Previously, all three expressions required a physical transpose | |
| 139 of M. | |
| 140 | |
| 141 ** More efficient handling of certain mixed real-complex matrix operations. | |
| 142 For instance, if RM is a real matrix and CM a complex matrix, | |
| 143 | |
| 144 RM * CM | |
| 145 | |
| 146 can now be evaluated either as | |
| 147 | |
| 148 complex (RM * real (CM), RM * imag (CM)) | |
| 149 | |
| 150 or as | |
| 151 | |
| 152 complex (RM) * CM, | |
| 153 | |
| 154 depending on the dimensions. The 1st form requires more temporaries and copying, | |
| 155 but halves the count of FLOPs, which normally brings better performance if | |
| 156 RM has enough rows. Previously, the 2nd form was always used. | |
| 157 | |
| 158 Matrix division is similarly affected. | |
| 159 | |
| 9717 | 160 ** More efficient handling of triangular matrix factors returned from factorizations. |
| 161 The functions for computing QR, LU and Cholesky factorizations will now automatically | |
| 162 return the triangular matrix factors with proper internal matrix_type set, so that it | |
| 163 won't need to be computed when the matrix is used for division. | |
| 164 | |
| 9722 | 165 ** The built-in "sum" function now handles the non-native summation (i.e. double precision |
| 166 sum of single or integer inputs) more efficiently, avoiding a temporary conversion of | |
| 167 the whole input array to doubles. Further, "sum" can now accept an "extra" option argument, | |
| 168 using a compensated summation algorithm rather than a straightforward sum, which significantly | |
| 169 improves precision if lots of cancellation occurs in the summation. | |
| 9717 | 170 |
| 9745 | 171 ** The built-in "bsxfun" function now uses optimized code for certain cases where built-in |
| 172 operator handles are passed in. Namely, the optimizations concern the operators | |
| 9830 | 173 plus, minus, times, ldivide, rdivide, power, and, or (for logical arrays), the relational |
| 9745 | 174 operators eq, ne, lt, le, gt, ge, and the functions min and max. |
| 9830 | 175 Optimizations only apply when both operands are of the same built-in class. Mixed real/complex |
| 176 and single/double operations will first convert both operands to a common type. | |
| 9745 | 177 |
| 10054 | 178 ** "strfind" and "strrep" now have compiled implementations, facilitating significantly |
| 179 more efficient searching and replacing in strings, especially with longer patterns. | |
| 180 The code of "strcat" has been vectorized and is now much more efficient | |
| 181 when lots of strings are concatenated. | |
| 182 | |
|
7990
86dae6e5b83c
Initial update of NEWS for 3.2 release
David Bateman <dbateman@free.fr>
parents:
7279
diff
changeset
|
183 Summary of important user-visible changes for version 3.2: |
| 5913 | 184 --------------------------------------------------------- |
| 2452 | 185 |
| 8737 | 186 ** Compatibility with Matlab graphics has been improved. |
| 6329 | 187 |
|
8070
3b53b25e2550
Add data sources and line series
David Bateman <dbateman@free.fr>
parents:
8014
diff
changeset
|
188 The hggroup object and associated listener callback functions have |
| 8737 | 189 been added allowing the inclusion of group objects. Data sources |
|
8070
3b53b25e2550
Add data sources and line series
David Bateman <dbateman@free.fr>
parents:
8014
diff
changeset
|
190 have been added to these group objects such that |
|
3b53b25e2550
Add data sources and line series
David Bateman <dbateman@free.fr>
parents:
8014
diff
changeset
|
191 |
|
3b53b25e2550
Add data sources and line series
David Bateman <dbateman@free.fr>
parents:
8014
diff
changeset
|
192 x = 0:0.1:10; |
|
3b53b25e2550
Add data sources and line series
David Bateman <dbateman@free.fr>
parents:
8014
diff
changeset
|
193 y = sin (x); |
|
3b53b25e2550
Add data sources and line series
David Bateman <dbateman@free.fr>
parents:
8014
diff
changeset
|
194 plot (x, y, "ydatasource", "y"); |
|
3b53b25e2550
Add data sources and line series
David Bateman <dbateman@free.fr>
parents:
8014
diff
changeset
|
195 for i = 1 : 100 |
|
3b53b25e2550
Add data sources and line series
David Bateman <dbateman@free.fr>
parents:
8014
diff
changeset
|
196 pause(0.1) |
|
3b53b25e2550
Add data sources and line series
David Bateman <dbateman@free.fr>
parents:
8014
diff
changeset
|
197 y = sin (x + 0.1 * i); |
|
3b53b25e2550
Add data sources and line series
David Bateman <dbateman@free.fr>
parents:
8014
diff
changeset
|
198 refreshdata(); |
|
3b53b25e2550
Add data sources and line series
David Bateman <dbateman@free.fr>
parents:
8014
diff
changeset
|
199 endfor |
|
3b53b25e2550
Add data sources and line series
David Bateman <dbateman@free.fr>
parents:
8014
diff
changeset
|
200 |
| 8737 | 201 works as expected. This capability has be used to introduce |
|
9031
1052a66078cf
Documentation cleanup of top-level Octave directory (READMEs, INSTALL)
Rik <rdrider0-list@yahoo.com>
parents:
8932
diff
changeset
|
202 stem-series, bar-series, etc., objects for better Matlab |
| 8737 | 203 compatibility. |
| 204 | |
| 205 ** New graphics functions: | |
| 206 | |
|
9110
22ae6b3411a7
Add isocolor, isonormals and isosurface functions (For Martin Helm). Add 3D filled triangular patches and the trisurf function
David Bateman <dbateman@free.fr>
parents:
9042
diff
changeset
|
207 addlistener ezcontour gcbo refresh |
|
22ae6b3411a7
Add isocolor, isonormals and isosurface functions (For Martin Helm). Add 3D filled triangular patches and the trisurf function
David Bateman <dbateman@free.fr>
parents:
9042
diff
changeset
|
208 addproperty ezcontourf ginput refreshdata |
|
22ae6b3411a7
Add isocolor, isonormals and isosurface functions (For Martin Helm). Add 3D filled triangular patches and the trisurf function
David Bateman <dbateman@free.fr>
parents:
9042
diff
changeset
|
209 allchild ezmesh gtext specular |
|
22ae6b3411a7
Add isocolor, isonormals and isosurface functions (For Martin Helm). Add 3D filled triangular patches and the trisurf function
David Bateman <dbateman@free.fr>
parents:
9042
diff
changeset
|
210 available_backends ezmeshc intwarning surfl |
|
22ae6b3411a7
Add isocolor, isonormals and isosurface functions (For Martin Helm). Add 3D filled triangular patches and the trisurf function
David Bateman <dbateman@free.fr>
parents:
9042
diff
changeset
|
211 backend ezplot ishghandle trisurf |
|
22ae6b3411a7
Add isocolor, isonormals and isosurface functions (For Martin Helm). Add 3D filled triangular patches and the trisurf function
David Bateman <dbateman@free.fr>
parents:
9042
diff
changeset
|
212 cla ezplot3 isocolors waitforbuttonpress |
|
22ae6b3411a7
Add isocolor, isonormals and isosurface functions (For Martin Helm). Add 3D filled triangular patches and the trisurf function
David Bateman <dbateman@free.fr>
parents:
9042
diff
changeset
|
213 clabel ezpolar isonormals |
|
22ae6b3411a7
Add isocolor, isonormals and isosurface functions (For Martin Helm). Add 3D filled triangular patches and the trisurf function
David Bateman <dbateman@free.fr>
parents:
9042
diff
changeset
|
214 comet ezsurf isosurface |
|
22ae6b3411a7
Add isocolor, isonormals and isosurface functions (For Martin Helm). Add 3D filled triangular patches and the trisurf function
David Bateman <dbateman@free.fr>
parents:
9042
diff
changeset
|
215 dellistener findall linkprop |
|
22ae6b3411a7
Add isocolor, isonormals and isosurface functions (For Martin Helm). Add 3D filled triangular patches and the trisurf function
David Bateman <dbateman@free.fr>
parents:
9042
diff
changeset
|
216 diffuse gcbf plotmatrix |
|
8070
3b53b25e2550
Add data sources and line series
David Bateman <dbateman@free.fr>
parents:
8014
diff
changeset
|
217 |
| 8737 | 218 ** New experimental OpenGL/FLTK based plotting system. |
| 219 | |
| 220 An experimental plotting system based on OpenGL and the FLTK | |
| 221 toolkit is now part of Octave. This backend is disabled by | |
| 222 default. You can switch to using it with the command | |
|
8070
3b53b25e2550
Add data sources and line series
David Bateman <dbateman@free.fr>
parents:
8014
diff
changeset
|
223 |
|
3b53b25e2550
Add data sources and line series
David Bateman <dbateman@free.fr>
parents:
8014
diff
changeset
|
224 backend ("fltk") |
|
3b53b25e2550
Add data sources and line series
David Bateman <dbateman@free.fr>
parents:
8014
diff
changeset
|
225 |
|
3b53b25e2550
Add data sources and line series
David Bateman <dbateman@free.fr>
parents:
8014
diff
changeset
|
226 for all future figures or for a particular figure with the command |
|
3b53b25e2550
Add data sources and line series
David Bateman <dbateman@free.fr>
parents:
8014
diff
changeset
|
227 |
|
3b53b25e2550
Add data sources and line series
David Bateman <dbateman@free.fr>
parents:
8014
diff
changeset
|
228 backend (h, "fltk") |
|
3b53b25e2550
Add data sources and line series
David Bateman <dbateman@free.fr>
parents:
8014
diff
changeset
|
229 |
| 8737 | 230 where "h" is a valid figure handle. Please note that this backend |
| 231 does not yet support text objects. Obviously, this is a necessary | |
| 232 feature before it can be considered usable. We are looking for | |
| 233 volunteers to help implement this missing feature. | |
|
8070
3b53b25e2550
Add data sources and line series
David Bateman <dbateman@free.fr>
parents:
8014
diff
changeset
|
234 |
| 8737 | 235 ** Functions providing direct access to gnuplot have been removed. |
| 236 | |
|
7990
86dae6e5b83c
Initial update of NEWS for 3.2 release
David Bateman <dbateman@free.fr>
parents:
7279
diff
changeset
|
237 The functions __gnuplot_plot__, __gnuplot_set__, __gnuplot_raw__, |
|
86dae6e5b83c
Initial update of NEWS for 3.2 release
David Bateman <dbateman@free.fr>
parents:
7279
diff
changeset
|
238 __gnuplot_show__, __gnuplot_replot__, __gnuplot_splot__, |
| 8737 | 239 __gnuplot_save_data__ and __gnuplot_send_inline_data__ have been |
| 240 removed from Octave. These function were incompatible with the | |
| 241 high level graphics handle code. | |
| 6329 | 242 |
| 8885 | 243 ** The Control, Finance and Quaternion functions have been removed. |
| 244 | |
| 245 These functions are now available as separate packages from | |
| 246 | |
| 247 http://octave.sourceforge.net/packages.html | |
| 248 | |
| 249 and can be reinstalled using the Octave package manager (see | |
| 250 the pkg function). | |
| 251 | |
| 252 ** Specific sparse matrix functions removed. | |
| 253 | |
| 254 The following functions, which handled only sparse matrices have | |
| 255 been removed. Instead of calling these functions directly, you | |
| 256 should use the corresponding function without the "sp" prefix. | |
| 8737 | 257 |
| 8885 | 258 spatan2 spcumsum spkron spprod |
| 259 spchol spdet splchol spqr | |
| 260 spchol2inv spdiag splu spsum | |
| 261 spcholinv spfind spmax spsumsqk | |
| 262 spcumprod spinv spmin | |
| 263 | |
| 264 ** Improvements to the debugger. | |
| 265 | |
| 266 The interactive debugging features have been improved. Stopping | |
| 267 on statements with dbstop should work correctly now. Stepping | |
| 268 into and over functions, and stepping one statement at a time | |
| 269 (with dbstep) now works. Moving up and down the call stack with | |
| 270 dbup and dbdown now works. The dbstack function is now available | |
| 271 to print the current function call stack. The new dbquit function | |
| 272 is available to exit the debugging mode. | |
| 273 | |
| 274 ** Improved traceback error messages. | |
| 275 | |
| 276 Traceback error messages are much more concise and easier to | |
| 277 understand. They now display information about the function call | |
| 278 stack instead of the stack of all statements that were active at | |
| 279 the point of the error. | |
|
8014
44d206ae68c9
improve fsolve compatibility
John W. Eaton <jwe@octave.org>
parents:
7990
diff
changeset
|
280 |
| 8737 | 281 ** Object Oriented Programming. |
|
8405
d79dfbff2f9d
document new norm features in NEWS
Jaroslav Hajek <highegg@gmail.com>
parents:
8396
diff
changeset
|
282 |
| 8737 | 283 Octave now includes OOP features and the user can create their own |
| 284 class objects and overloaded functions and operators. For | |
| 285 example, all methods of a class called "myclass" will be found in | |
| 286 a directory "@myclass" on the users path. The class specific | |
| 287 versions of functions and operators take precedence over the | |
| 288 generic versions of these functions. | |
| 289 | |
| 290 New functions related to OOP include | |
| 7189 | 291 |
| 8737 | 292 class inferiorto isobject loadobj methods superiorto |
| 293 | |
| 294 See the Octave manual for more details. | |
| 7038 | 295 |
| 8747 | 296 ** Parsing of Command-style Functions. |
| 297 | |
| 298 Octave now parses command-style functions without needing to first | |
| 299 declare them with "mark_as_command". The rules for recognizing a | |
| 300 command-style function calls are | |
| 301 | |
| 302 * A command must appear as the first word in a statement, | |
| 303 followed by a space. | |
| 304 | |
| 305 * The first character after the space must not be '=' or '(' | |
| 306 | |
| 307 * The next token after the space must not look like a binary | |
| 308 operator. | |
| 309 | |
| 310 These rules should be mostly compatible with the way Matlab parses | |
| 311 command-style function calls and allow users to define commands in | |
| 312 .m files without having to mark them as commands. | |
| 313 | |
| 314 Note that previous versions of Octave allowed expressions like | |
| 315 | |
| 316 x = load -text foo.dat | |
| 317 | |
| 318 but an expression like this will now generate a parse error. In | |
| 319 order to assign the value returned by a function to a variable, | |
| 320 you must use the normal function call syntax: | |
| 321 | |
| 322 x = load ("-text", "foo.dat"); | |
| 323 | |
| 8737 | 324 ** Block comments. |
| 325 | |
| 8747 | 326 Commented code can be between matching "#{" and "#}" or "%{" and |
| 327 "%}" markers, even if the commented code spans several line. This | |
| 328 allows blocks code to be commented, without needing to comment | |
| 329 each line. For example, | |
| 5814 | 330 |
| 8747 | 331 function [s, t] = func (x, y) |
| 332 s = 2 * x; | |
| 333 #{ | |
| 334 s *= y; | |
| 335 t = y + x; | |
| 336 #} | |
|
7990
86dae6e5b83c
Initial update of NEWS for 3.2 release
David Bateman <dbateman@free.fr>
parents:
7279
diff
changeset
|
337 endfunction |
| 5814 | 338 |
| 8747 | 339 the lines "s *= y;" and "t = y + x" will not be executed. |
| 8737 | 340 |
| 341 ** Special treatment in the parser of expressions like "a' * b". | |
| 2452 | 342 |
| 8737 | 343 In these cases the transpose is no longer explicitly formed and |
| 344 BLAS libraries are called with the transpose flagged, | |
| 345 significantly improving performance for these kinds of | |
| 346 operations. | |
|
8417
654bcfb937bf
Add the eigs and svds functions
David Bateman <dbateman@free.fr>
parents:
8405
diff
changeset
|
347 |
| 8737 | 348 ** Single Precision data type. |
| 2452 | 349 |
| 8737 | 350 Octave now includes a single precision data type. Single |
| 351 precision variables can be created with the "single" command, or | |
|
9034
52515efc50c0
Documentation cleanup on NEWS file
Rik <rdrider0-list@yahoo.com>
parents:
9031
diff
changeset
|
352 from functions like ones, eye, etc. For example, |
| 5995 | 353 |
| 8737 | 354 single (1) |
| 355 ones (2, 2, "single") | |
| 356 zeros (2, 2, "single") | |
| 357 eye (2, 2, "single") | |
| 358 Inf (2, 2, "single") | |
| 359 NaN (2, 2, "single") | |
| 360 NA (2, 2, "single") | |
| 7279 | 361 |
| 8737 | 362 all create single precision variables. For compatibility with |
| 363 Matlab, mixed double/single precision operators and functions | |
| 364 return single precision types. | |
| 365 | |
| 366 As a consequence of this addition to Octave the internal | |
|
7990
86dae6e5b83c
Initial update of NEWS for 3.2 release
David Bateman <dbateman@free.fr>
parents:
7279
diff
changeset
|
367 representation of the double precision NA value has changed, and |
|
86dae6e5b83c
Initial update of NEWS for 3.2 release
David Bateman <dbateman@free.fr>
parents:
7279
diff
changeset
|
368 so users that make use of data generated by Octave with R or |
|
86dae6e5b83c
Initial update of NEWS for 3.2 release
David Bateman <dbateman@free.fr>
parents:
7279
diff
changeset
|
369 visa-versa are warned that compatibility might not be assured. |
| 7279 | 370 |
| 8737 | 371 ** Improved array indexing. |
| 372 | |
| 373 The underlying code used for indexing of arrays has been | |
|
9034
52515efc50c0
Documentation cleanup on NEWS file
Rik <rdrider0-list@yahoo.com>
parents:
9031
diff
changeset
|
374 completely rewritten and indexing is now significantly faster. |
| 8737 | 375 |
| 8755 | 376 ** Improved memory management. |
| 377 | |
| 378 Octave will now attempt to share data in some cases where previously | |
| 379 a copy would be made, such as certain array slicing operations or | |
|
9031
1052a66078cf
Documentation cleanup of top-level Octave directory (READMEs, INSTALL)
Rik <rdrider0-list@yahoo.com>
parents:
8932
diff
changeset
|
380 conversions between cells, structs and cs-lists. This usually reduces |
| 8755 | 381 both time and memory consumption. |
| 9128 | 382 Also, Octave will now attempt to detect and optimize usage of a vector |
| 383 as a stack, when elements are being repeatedly inserted at/removed from | |
| 384 the end of the vector. | |
| 8755 | 385 |
| 8738 | 386 ** Improved performance for reduction operations. |
| 387 | |
| 8755 | 388 The performance of the sum, prod, sumsq, cumsum, cumprod, any, all, |
| 389 max and min functions has been significantly improved. | |
| 8738 | 390 |
| 9006 | 391 ** Sorting and searching. |
| 392 | |
| 393 The performance of sort has been improved, especially when sorting | |
| 394 indices are requested. An efficient built-in issorted implementation | |
| 395 was added. sortrows now uses a more efficient algorithm, especially | |
| 396 in the homegeneous case. lookup is now a built-in function performing | |
| 397 a binary search, optimized for long runs of close elements. Lookup | |
| 398 also works with cell arrays of strings. | |
| 399 | |
| 400 ** Range arithmetics | |
| 401 | |
| 402 For some operations on ranges, Octave will attempt to keep the result as a | |
| 403 range. These include negation, adding a scalar, subtracting a scalar, and | |
| 404 multiplying by a scalar. Ranges with zero increment are allowed and can be | |
| 405 constructed using the built-in function `ones'. | |
| 406 | |
| 407 ** Various performance improvements. | |
| 408 | |
| 409 Performance of a number of other built-in operations and functions was | |
| 410 improved, including: | |
| 411 | |
| 412 * logical operations | |
| 413 * comparison operators | |
| 414 * element-wise power | |
| 415 * accumarray | |
| 416 * cellfun | |
| 417 * isnan | |
| 418 * isinf | |
| 419 * isfinite | |
| 420 * nchoosek | |
| 421 * repmat | |
| 422 * strcmp | |
| 423 | |
| 8737 | 424 ** 64-bit integer arithmetic. |
| 425 | |
| 426 Arithmetic with 64-bit integers (int64 and uint64 types) is fully | |
| 427 supported, with saturation semantics like the other integer types. | |
| 428 Performance of most integer arithmetic operations has been | |
| 429 improved by using integer arithmetic directly. Previously, Octave | |
| 430 performed integer math with saturation semantics by converting the | |
| 431 operands to double precision, performing the operation, and then | |
| 432 converting the result back to an integer value, truncating if | |
| 433 necessary. | |
| 434 | |
| 8885 | 435 ** Diagonal and permutation matrices. |
| 436 | |
| 437 The interpreter can now treat diagonal and permutation matrices as | |
| 438 special objects that store only the non-zero elements, rather than | |
| 439 general full matrices. Therefore, it is now possible to construct | |
| 440 and use these matrices in linear algebra without suffering a | |
| 441 performance penalty due to storing large numbers of zero elements. | |
| 442 | |
| 443 ** Improvements to fsolve. | |
| 444 | |
| 445 The fsolve function now accepts an option structure argument (see | |
| 446 also the optimset function). The INFO values returned from fsolve | |
| 447 have changed to be compatible with Matlab's fsolve function. | |
| 448 Additionally, fsolve is now able to solve overdetermined systems, | |
| 449 complex-differentiable complex systems, systems with a sparse | |
| 450 jacobian and can work in single precision if given single precision | |
|
9031
1052a66078cf
Documentation cleanup of top-level Octave directory (READMEs, INSTALL)
Rik <rdrider0-list@yahoo.com>
parents:
8932
diff
changeset
|
451 inputs. It can also be called recursively. |
| 8885 | 452 |
| 8737 | 453 ** Improvements to the norm function. |
| 454 | |
| 455 The norm function is now able to compute row or column norms of a | |
| 456 matrix in a single call, as well as general matrix p-norms. | |
| 457 | |
| 458 ** New functions for computing some eigenvalues or singular values. | |
| 459 | |
| 460 The eigs and svds functions have been included in Octave. These | |
| 461 functions require the ARPACK library (now distributed under a | |
| 462 GPL-compatible license). | |
| 463 | |
| 464 ** New QR and Cholesky factorization updating functions. | |
|
8370
34960ba08a81
document more new features in the NEWS file
Jaroslav Hajek <highegg@gmail.com>
parents:
8292
diff
changeset
|
465 |
| 8737 | 466 choldelete cholshift qrdelete qrshift |
| 467 cholinsert cholupdate qrinsert qrupdate | |
| 468 | |
| 469 ** New quadrature functions. | |
| 470 | |
| 471 dblquad quadgk quadv triplequad | |
| 472 | |
| 8885 | 473 ** New functions for reading and writing images. |
| 474 | |
| 475 The imwrite and imread functions have been included in Octave. | |
| 476 These functions require the GraphicsMagick library. The new | |
| 477 function imfinfo provides information about an image file (size, | |
| 478 type, colors, etc.) | |
| 479 | |
|
9215
1500d0197484
allow multiple input event hook functions to be installed simultaneously
John W. Eaton <jwe@octave.org>
parents:
9128
diff
changeset
|
480 ** The input_event_hook function has been replaced by the pair of |
|
1500d0197484
allow multiple input event hook functions to be installed simultaneously
John W. Eaton <jwe@octave.org>
parents:
9128
diff
changeset
|
481 functions add_input_event_hook and remove_input_event_hook so that |
|
1500d0197484
allow multiple input event hook functions to be installed simultaneously
John W. Eaton <jwe@octave.org>
parents:
9128
diff
changeset
|
482 more than one hook function may be installed at a time. |
|
1500d0197484
allow multiple input event hook functions to be installed simultaneously
John W. Eaton <jwe@octave.org>
parents:
9128
diff
changeset
|
483 |
| 8737 | 484 ** Other miscellaneous new functions. |
|
8370
34960ba08a81
document more new features in the NEWS file
Jaroslav Hajek <highegg@gmail.com>
parents:
8292
diff
changeset
|
485 |
|
8932
2d0f8692a82e
Add the 'histc' function
Soren Hauberg <hauberg@gmail.com>
parents:
8888
diff
changeset
|
486 addtodate hypot reallog |
|
2d0f8692a82e
Add the 'histc' function
Soren Hauberg <hauberg@gmail.com>
parents:
8888
diff
changeset
|
487 bicgstab idivide realpow |
| 9006 | 488 cellslices info realsqrt |
| 489 cgs interp1q rectint | |
| 490 command_line_path isdebugmode regexptranslate | |
| 491 contrast isfloat restoredefaultpath | |
| 492 convn isstrprop roundb | |
| 493 cummin log1p rundemos | |
| 494 cummax lsqnonneg runlength | |
| 495 datetick matlabroot saveobj | |
| 496 display namelengthmax spaugment | |
| 497 expm1 nargoutchk strchr | |
| 498 filemarker pathdef strvcat | |
| 499 fstat perl subspace | |
| 500 full prctile symvar | |
| 501 fzero quantile treelayout | |
| 502 genvarname re_read_readline_init_file validatestring | |
| 503 histc | |
|
8370
34960ba08a81
document more new features in the NEWS file
Jaroslav Hajek <highegg@gmail.com>
parents:
8292
diff
changeset
|
504 |
| 8885 | 505 ** Changes to strcat. |
| 506 | |
| 507 The strcat function is now compatible with Matlab's strcat | |
| 508 function, which removes trailing whitespace when concatenating | |
| 509 character strings. For example | |
| 510 | |
| 511 strcat ('foo ', 'bar') | |
| 512 ==> 'foobar' | |
| 513 | |
| 514 The new function cstrcat provides the previous behavior of | |
| 515 Octave's strcat. | |
| 516 | |
| 517 ** Improvements to the help functions. | |
| 518 | |
|
9034
52515efc50c0
Documentation cleanup on NEWS file
Rik <rdrider0-list@yahoo.com>
parents:
9031
diff
changeset
|
519 The help system has been mostly re-implemented in .m files to make |
| 8885 | 520 it easier to modify. Performance of the lookfor function has been |
| 521 greatly improved by caching the help text from all functions that | |
| 522 are distributed with Octave. The pkg function has been modified | |
| 523 to generate cache files for external packages when they are | |
| 524 installed. | |
| 525 | |
|
8888
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
526 ** Deprecated functions. |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
527 |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
528 The following functions were deprecated in Octave 3.0 and will be |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
529 removed in Octave 3.4 (or whatever version is the second major |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
530 release after 3.0): |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
531 |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
532 beta_cdf geometric_pdf pascal_pdf |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
533 beta_inv geometric_rnd pascal_rnd |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
534 beta_pdf hypergeometric_cdf poisson_cdf |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
535 beta_rnd hypergeometric_inv poisson_inv |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
536 binomial_cdf hypergeometric_pdf poisson_pdf |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
537 binomial_inv hypergeometric_rnd poisson_rnd |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
538 binomial_pdf intersection polyinteg |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
539 binomial_rnd is_bool setstr |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
540 chisquare_cdf is_complex struct_contains |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
541 chisquare_inv is_list struct_elements |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
542 chisquare_pdf is_matrix t_cdf |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
543 chisquare_rnd is_scalar t_inv |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
544 clearplot is_square t_pdf |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
545 clg is_stream t_rnd |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
546 com2str is_struct uniform_cdf |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
547 exponential_cdf is_symmetric uniform_inv |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
548 exponential_inv is_vector uniform_pdf |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
549 exponential_pdf isstr uniform_rnd |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
550 exponential_rnd lognormal_cdf weibcdf |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
551 f_cdf lognormal_inv weibinv |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
552 f_inv lognormal_pdf weibpdf |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
553 f_pdf lognormal_rnd weibrnd |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
554 f_rnd meshdom weibull_cdf |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
555 gamma_cdf normal_cdf weibull_inv |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
556 gamma_inv normal_inv weibull_pdf |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
557 gamma_pdf normal_pdf weibull_rnd |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
558 gamma_rnd normal_rnd wiener_rnd |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
559 geometric_cdf pascal_cdf |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
560 geometric_inv pascal_inv |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
561 |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
562 The following functions are now deprecated in Octave 3.2 and will |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
563 be removed in Octave 3.6 (or whatever version is the second major |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
564 release after 3.2): |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
565 |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
566 create_set spcholinv spmax |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
567 dmult spcumprod spmin |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
568 iscommand spcumsum spprod |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
569 israwcommand spdet spqr |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
570 lchol spdiag spsum |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
571 loadimage spfind spsumsq |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
572 mark_as_command spinv str2mat |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
573 mark_as_rawcommand spkron unmark_command |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
574 spatan2 splchol unmark_rawcommand |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
575 spchol split |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
576 spchol2inv splu |
|
0c7b0049c023
mark create_set as deprecated in 3.2, not 3.0
John W. Eaton <jwe@octave.org>
parents:
8885
diff
changeset
|
577 |
|
7990
86dae6e5b83c
Initial update of NEWS for 3.2 release
David Bateman <dbateman@free.fr>
parents:
7279
diff
changeset
|
578 See NEWS.3 for old news. |