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comparison pages/NEWS-3.2.md @ 215:dedb85c54245
Reorganize homepage.
| author | Kai T. Ohlhus <k.ohlhus@gmail.com> |
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| date | Thu, 10 Sep 2020 17:47:36 +0900 |
| parents | |
| children | c8126c010d67 |
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| 1 --- | |
| 2 layout: page | |
| 3 title: GNU Octave Version 3.2 | |
| 4 menu: false | |
| 5 permalink: NEWS-3.2.html | |
| 6 --- | |
| 7 | |
| 8 ## Summary of important user-visible changes | |
| 9 | |
| 10 June 5, 2009 | |
| 11 | |
| 12 {% include release_news_select.md %} | |
| 13 | |
| 14 <pre> | |
| 15 ** Compatibility with Matlab graphics has been improved. | |
| 16 | |
| 17 The hggroup object and associated listener callback functions have | |
| 18 been added allowing the inclusion of group objects. Data sources | |
| 19 have been added to these group objects such that | |
| 20 | |
| 21 x = 0:0.1:10; | |
| 22 y = sin (x); | |
| 23 plot (x, y, "ydatasource", "y"); | |
| 24 for i = 1 : 100 | |
| 25 pause(0.1) | |
| 26 y = sin (x + 0.1 * i); | |
| 27 refreshdata(); | |
| 28 endfor | |
| 29 | |
| 30 works as expected. This capability has be used to introduce | |
| 31 stem-series, bar-series, etc., objects for better Matlab | |
| 32 compatibility. | |
| 33 | |
| 34 ** New graphics functions: | |
| 35 | |
| 36 addlistener ezcontour gcbo refresh | |
| 37 addproperty ezcontourf ginput refreshdata | |
| 38 allchild ezmesh gtext specular | |
| 39 available_backends ezmeshc intwarning surfl | |
| 40 backend ezplot ishghandle trisurf | |
| 41 cla ezplot3 isocolors waitforbuttonpress | |
| 42 clabel ezpolar isonormals | |
| 43 comet ezsurf isosurface | |
| 44 dellistener findall linkprop | |
| 45 diffuse gcbf plotmatrix | |
| 46 | |
| 47 ** New experimental OpenGL/FLTK based plotting system. | |
| 48 | |
| 49 An experimental plotting system based on OpenGL and the FLTK | |
| 50 toolkit is now part of Octave. This backend is disabled by | |
| 51 default. You can switch to using it with the command | |
| 52 | |
| 53 backend ("fltk") | |
| 54 | |
| 55 for all future figures or for a particular figure with the command | |
| 56 | |
| 57 backend (h, "fltk") | |
| 58 | |
| 59 where "h" is a valid figure handle. Please note that this backend | |
| 60 does not yet support text objects. Obviously, this is a necessary | |
| 61 feature before it can be considered usable. We are looking for | |
| 62 volunteers to help implement this missing feature. | |
| 63 | |
| 64 ** Functions providing direct access to gnuplot have been removed. | |
| 65 | |
| 66 The functions __gnuplot_plot__, __gnuplot_set__, __gnuplot_raw__, | |
| 67 __gnuplot_show__, __gnuplot_replot__, __gnuplot_splot__, | |
| 68 __gnuplot_save_data__ and __gnuplot_send_inline_data__ have been | |
| 69 removed from Octave. These function were incompatible with the | |
| 70 high level graphics handle code. | |
| 71 | |
| 72 ** The Control, Finance and Quaternion functions have been removed. | |
| 73 | |
| 74 These functions are now available as separate packages from | |
| 75 | |
| 76 http://octave.sourceforge.net/packages.html | |
| 77 | |
| 78 and can be reinstalled using the Octave package manager (see | |
| 79 the pkg function). | |
| 80 | |
| 81 ** Specific sparse matrix functions removed. | |
| 82 | |
| 83 The following functions, which handled only sparse matrices have | |
| 84 been removed. Instead of calling these functions directly, you | |
| 85 should use the corresponding function without the "sp" prefix. | |
| 86 | |
| 87 spatan2 spcumsum spkron spprod | |
| 88 spchol spdet splchol spqr | |
| 89 spchol2inv spdiag splu spsum | |
| 90 spcholinv spfind spmax spsumsqk | |
| 91 spcumprod spinv spmin | |
| 92 | |
| 93 ** Improvements to the debugger. | |
| 94 | |
| 95 The interactive debugging features have been improved. Stopping | |
| 96 on statements with dbstop should work correctly now. Stepping | |
| 97 into and over functions, and stepping one statement at a time | |
| 98 (with dbstep) now works. Moving up and down the call stack with | |
| 99 dbup and dbdown now works. The dbstack function is now available | |
| 100 to print the current function call stack. The new dbquit function | |
| 101 is available to exit the debugging mode. | |
| 102 | |
| 103 ** Improved traceback error messages. | |
| 104 | |
| 105 Traceback error messages are much more concise and easier to | |
| 106 understand. They now display information about the function call | |
| 107 stack instead of the stack of all statements that were active at | |
| 108 the point of the error. | |
| 109 | |
| 110 ** Object Oriented Programming. | |
| 111 | |
| 112 Octave now includes OOP features and the user can create their own | |
| 113 class objects and overloaded functions and operators. For | |
| 114 example, all methods of a class called "myclass" will be found in | |
| 115 a directory "@myclass" on the users path. The class specific | |
| 116 versions of functions and operators take precedence over the | |
| 117 generic versions of these functions. | |
| 118 | |
| 119 New functions related to OOP include | |
| 120 | |
| 121 class inferiorto isobject loadobj methods superiorto | |
| 122 | |
| 123 See the Octave manual for more details. | |
| 124 | |
| 125 ** Parsing of Command-style Functions. | |
| 126 | |
| 127 Octave now parses command-style functions without needing to first | |
| 128 declare them with "mark_as_command". The rules for recognizing a | |
| 129 command-style function calls are | |
| 130 | |
| 131 * A command must appear as the first word in a statement, | |
| 132 followed by a space. | |
| 133 | |
| 134 * The first character after the space must not be '=' or '(' | |
| 135 | |
| 136 * The next token after the space must not look like a binary | |
| 137 operator. | |
| 138 | |
| 139 These rules should be mostly compatible with the way Matlab parses | |
| 140 command-style function calls and allow users to define commands in | |
| 141 .m files without having to mark them as commands. | |
| 142 | |
| 143 Note that previous versions of Octave allowed expressions like | |
| 144 | |
| 145 x = load -text foo.dat | |
| 146 | |
| 147 but an expression like this will now generate a parse error. In | |
| 148 order to assign the value returned by a function to a variable, | |
| 149 you must use the normal function call syntax: | |
| 150 | |
| 151 x = load ("-text", "foo.dat"); | |
| 152 | |
| 153 ** Block comments. | |
| 154 | |
| 155 Commented code can be between matching "#{" and "#}" or "%{" and | |
| 156 "%}" markers, even if the commented code spans several line. This | |
| 157 allows blocks code to be commented, without needing to comment | |
| 158 each line. For example, | |
| 159 | |
| 160 function [s, t] = func (x, y) | |
| 161 s = 2 * x; | |
| 162 #{ | |
| 163 s *= y; | |
| 164 t = y + x; | |
| 165 #} | |
| 166 endfunction | |
| 167 | |
| 168 the lines "s *= y;" and "t = y + x" will not be executed. | |
| 169 | |
| 170 ** Special treatment in the parser of expressions like "a' * b". | |
| 171 | |
| 172 In these cases the transpose is no longer explicitly formed and | |
| 173 BLAS libraries are called with the transpose flagged, | |
| 174 significantly improving performance for these kinds of | |
| 175 operations. | |
| 176 | |
| 177 ** Single Precision data type. | |
| 178 | |
| 179 Octave now includes a single precision data type. Single | |
| 180 precision variables can be created with the "single" command, or | |
| 181 from functions like ones, eye, etc. For example, | |
| 182 | |
| 183 single (1) | |
| 184 ones (2, 2, "single") | |
| 185 zeros (2, 2, "single") | |
| 186 eye (2, 2, "single") | |
| 187 Inf (2, 2, "single") | |
| 188 NaN (2, 2, "single") | |
| 189 NA (2, 2, "single") | |
| 190 | |
| 191 all create single precision variables. For compatibility with | |
| 192 Matlab, mixed double/single precision operators and functions | |
| 193 return single precision types. | |
| 194 | |
| 195 As a consequence of this addition to Octave the internal | |
| 196 representation of the double precision NA value has changed, and | |
| 197 so users that make use of data generated by Octave with R or | |
| 198 visa-versa are warned that compatibility might not be assured. | |
| 199 | |
| 200 ** Improved array indexing. | |
| 201 | |
| 202 The underlying code used for indexing of arrays has been | |
| 203 completely rewritten and indexing is now significantly faster. | |
| 204 | |
| 205 ** Improved memory management. | |
| 206 | |
| 207 Octave will now attempt to share data in some cases where previously | |
| 208 a copy would be made, such as certain array slicing operations or | |
| 209 conversions between cells, structs and cs-lists. This usually reduces | |
| 210 both time and memory consumption. | |
| 211 Also, Octave will now attempt to detect and optimize usage of a vector | |
| 212 as a stack, when elements are being repeatedly inserted at/removed from | |
| 213 the end of the vector. | |
| 214 | |
| 215 ** Improved performance for reduction operations. | |
| 216 | |
| 217 The performance of the sum, prod, sumsq, cumsum, cumprod, any, all, | |
| 218 max and min functions has been significantly improved. | |
| 219 | |
| 220 ** Sorting and searching. | |
| 221 | |
| 222 The performance of sort has been improved, especially when sorting | |
| 223 indices are requested. An efficient built-in issorted implementation | |
| 224 was added. sortrows now uses a more efficient algorithm, especially | |
| 225 in the homegeneous case. lookup is now a built-in function performing | |
| 226 a binary search, optimized for long runs of close elements. Lookup | |
| 227 also works with cell arrays of strings. | |
| 228 | |
| 229 ** Range arithmetics | |
| 230 | |
| 231 For some operations on ranges, Octave will attempt to keep the result as a | |
| 232 range. These include negation, adding a scalar, subtracting a scalar, and | |
| 233 multiplying by a scalar. Ranges with zero increment are allowed and can be | |
| 234 constructed using the built-in function `ones'. | |
| 235 | |
| 236 ** Various performance improvements. | |
| 237 | |
| 238 Performance of a number of other built-in operations and functions was | |
| 239 improved, including: | |
| 240 | |
| 241 * logical operations | |
| 242 * comparison operators | |
| 243 * element-wise power | |
| 244 * accumarray | |
| 245 * cellfun | |
| 246 * isnan | |
| 247 * isinf | |
| 248 * isfinite | |
| 249 * nchoosek | |
| 250 * repmat | |
| 251 * strcmp | |
| 252 | |
| 253 ** 64-bit integer arithmetic. | |
| 254 | |
| 255 Arithmetic with 64-bit integers (int64 and uint64 types) is fully | |
| 256 supported, with saturation semantics like the other integer types. | |
| 257 Performance of most integer arithmetic operations has been | |
| 258 improved by using integer arithmetic directly. Previously, Octave | |
| 259 performed integer math with saturation semantics by converting the | |
| 260 operands to double precision, performing the operation, and then | |
| 261 converting the result back to an integer value, truncating if | |
| 262 necessary. | |
| 263 | |
| 264 ** Diagonal and permutation matrices. | |
| 265 | |
| 266 The interpreter can now treat diagonal and permutation matrices as | |
| 267 special objects that store only the non-zero elements, rather than | |
| 268 general full matrices. Therefore, it is now possible to construct | |
| 269 and use these matrices in linear algebra without suffering a | |
| 270 performance penalty due to storing large numbers of zero elements. | |
| 271 | |
| 272 ** Improvements to fsolve. | |
| 273 | |
| 274 The fsolve function now accepts an option structure argument (see | |
| 275 also the optimset function). The INFO values returned from fsolve | |
| 276 have changed to be compatible with Matlab's fsolve function. | |
| 277 Additionally, fsolve is now able to solve overdetermined systems, | |
| 278 complex-differentiable complex systems, systems with a sparse | |
| 279 jacobian and can work in single precision if given single precision | |
| 280 inputs. It can also be called recursively. | |
| 281 | |
| 282 ** Improvements to the norm function. | |
| 283 | |
| 284 The norm function is now able to compute row or column norms of a | |
| 285 matrix in a single call, as well as general matrix p-norms. | |
| 286 | |
| 287 ** New functions for computing some eigenvalues or singular values. | |
| 288 | |
| 289 The eigs and svds functions have been included in Octave. These | |
| 290 functions require the ARPACK library (now distributed under a | |
| 291 GPL-compatible license). | |
| 292 | |
| 293 ** New QR and Cholesky factorization updating functions. | |
| 294 | |
| 295 choldelete cholshift qrdelete qrshift | |
| 296 cholinsert cholupdate qrinsert qrupdate | |
| 297 | |
| 298 ** New quadrature functions. | |
| 299 | |
| 300 dblquad quadgk quadv triplequad | |
| 301 | |
| 302 ** New functions for reading and writing images. | |
| 303 | |
| 304 The imwrite and imread functions have been included in Octave. | |
| 305 These functions require the GraphicsMagick library. The new | |
| 306 function imfinfo provides information about an image file (size, | |
| 307 type, colors, etc.) | |
| 308 | |
| 309 ** The input_event_hook function has been replaced by the pair of | |
| 310 functions add_input_event_hook and remove_input_event_hook so that | |
| 311 more than one hook function may be installed at a time. | |
| 312 | |
| 313 ** Other miscellaneous new functions. | |
| 314 | |
| 315 addtodate hypot reallog | |
| 316 bicgstab idivide realpow | |
| 317 cellslices info realsqrt | |
| 318 cgs interp1q rectint | |
| 319 command_line_path isdebugmode regexptranslate | |
| 320 contrast isfloat restoredefaultpath | |
| 321 convn isstrprop roundb | |
| 322 cummin log1p rundemos | |
| 323 cummax lsqnonneg runlength | |
| 324 datetick matlabroot saveobj | |
| 325 display namelengthmax spaugment | |
| 326 expm1 nargoutchk strchr | |
| 327 filemarker pathdef strvcat | |
| 328 fstat perl subspace | |
| 329 full prctile symvar | |
| 330 fzero quantile treelayout | |
| 331 genvarname re_read_readline_init_file validatestring | |
| 332 histc | |
| 333 | |
| 334 ** Changes to strcat. | |
| 335 | |
| 336 The strcat function is now compatible with Matlab's strcat | |
| 337 function, which removes trailing whitespace when concatenating | |
| 338 character strings. For example | |
| 339 | |
| 340 strcat ('foo ', 'bar') | |
| 341 ==> 'foobar' | |
| 342 | |
| 343 The new function cstrcat provides the previous behavior of | |
| 344 Octave's strcat. | |
| 345 | |
| 346 ** Improvements to the help functions. | |
| 347 | |
| 348 The help system has been mostly re-implemented in .m files to make | |
| 349 it easier to modify. Performance of the lookfor function has been | |
| 350 greatly improved by caching the help text from all functions that | |
| 351 are distributed with Octave. The pkg function has been modified | |
| 352 to generate cache files for external packages when they are | |
| 353 installed. | |
| 354 | |
| 355 ** Deprecated functions. | |
| 356 | |
| 357 The following functions were deprecated in Octave 3.0 and will be | |
| 358 removed in Octave 3.4 (or whatever version is the second major | |
| 359 release after 3.0): | |
| 360 | |
| 361 beta_cdf geometric_pdf pascal_pdf | |
| 362 beta_inv geometric_rnd pascal_rnd | |
| 363 beta_pdf hypergeometric_cdf poisson_cdf | |
| 364 beta_rnd hypergeometric_inv poisson_inv | |
| 365 binomial_cdf hypergeometric_pdf poisson_pdf | |
| 366 binomial_inv hypergeometric_rnd poisson_rnd | |
| 367 binomial_pdf intersection polyinteg | |
| 368 binomial_rnd is_bool setstr | |
| 369 chisquare_cdf is_complex struct_contains | |
| 370 chisquare_inv is_list struct_elements | |
| 371 chisquare_pdf is_matrix t_cdf | |
| 372 chisquare_rnd is_scalar t_inv | |
| 373 clearplot is_square t_pdf | |
| 374 clg is_stream t_rnd | |
| 375 com2str is_struct uniform_cdf | |
| 376 exponential_cdf is_symmetric uniform_inv | |
| 377 exponential_inv is_vector uniform_pdf | |
| 378 exponential_pdf isstr uniform_rnd | |
| 379 exponential_rnd lognormal_cdf weibcdf | |
| 380 f_cdf lognormal_inv weibinv | |
| 381 f_inv lognormal_pdf weibpdf | |
| 382 f_pdf lognormal_rnd weibrnd | |
| 383 f_rnd meshdom weibull_cdf | |
| 384 gamma_cdf normal_cdf weibull_inv | |
| 385 gamma_inv normal_inv weibull_pdf | |
| 386 gamma_pdf normal_pdf weibull_rnd | |
| 387 gamma_rnd normal_rnd wiener_rnd | |
| 388 geometric_cdf pascal_cdf | |
| 389 geometric_inv pascal_inv | |
| 390 | |
| 391 The following functions are now deprecated in Octave 3.2 and will | |
| 392 be removed in Octave 3.6 (or whatever version is the second major | |
| 393 release after 3.2): | |
| 394 | |
| 395 create_set spcholinv spmax | |
| 396 dmult spcumprod spmin | |
| 397 iscommand spcumsum spprod | |
| 398 israwcommand spdet spqr | |
| 399 lchol spdiag spsum | |
| 400 loadimage spfind spsumsq | |
| 401 mark_as_command spinv str2mat | |
| 402 mark_as_rawcommand spkron unmark_command | |
| 403 spatan2 splchol unmark_rawcommand | |
| 404 spchol split | |
| 405 spchol2inv splu | |
| 406 | |
| 407 See NEWS.3 for old news. | |
| 408 </pre> |