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annotate NEWS @ 9365:3cf6a0f9a7a7
NEWS update
| author | Jaroslav Hajek <highegg@gmail.com> |
|---|---|
| date | Fri, 19 Jun 2009 07:47:01 +0200 |
| parents | b59cc3252a51 |
| children | 0951174cbb03 |
| rev | line source |
|---|---|
| 9352 | 1 Summary of important user-visible changes for version 3.3: |
| 2 --------------------------------------------------------- | |
| 3 | |
| 4 ** The `lookup' function was extended to be more useful for general-purpose | |
| 5 binary searching. Using this improvement, the ismember function was | |
| 9365 | 6 rewritten for significantly better performance. The underlying algorithm |
| 7 of lookup was also improved and is now much faster in certain important | |
| 8 cases. | |
| 9352 | 9 |
| 10 ** Real, integer and logical matrices, when used in indexing, will now | |
| 11 cache the internal index_vector value (zero-based indices) when | |
| 12 successfully used as indices, eliminating the conversion penalty for | |
| 13 subsequent indexing by the same matrix. In particular, this means it is | |
| 14 no longer needed to avoid repeated indexing by logical arrays using | |
| 15 `find' for performance reasons. | |
| 16 | |
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17 Summary of important user-visible changes for version 3.2: |
| 5913 | 18 --------------------------------------------------------- |
| 2452 | 19 |
| 8737 | 20 ** Compatibility with Matlab graphics has been improved. |
| 6329 | 21 |
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22 The hggroup object and associated listener callback functions have |
| 8737 | 23 been added allowing the inclusion of group objects. Data sources |
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24 have been added to these group objects such that |
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25 |
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26 x = 0:0.1:10; |
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27 y = sin (x); |
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28 plot (x, y, "ydatasource", "y"); |
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29 for i = 1 : 100 |
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30 pause(0.1) |
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31 y = sin (x + 0.1 * i); |
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32 refreshdata(); |
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33 endfor |
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34 |
| 8737 | 35 works as expected. This capability has be used to introduce |
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36 stem-series, bar-series, etc., objects for better Matlab |
| 8737 | 37 compatibility. |
| 38 | |
| 39 ** New graphics functions: | |
| 40 | |
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41 addlistener ezcontour gcbo refresh |
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42 addproperty ezcontourf ginput refreshdata |
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43 allchild ezmesh gtext specular |
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44 available_backends ezmeshc intwarning surfl |
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45 backend ezplot ishghandle trisurf |
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46 cla ezplot3 isocolors waitforbuttonpress |
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47 clabel ezpolar isonormals |
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48 comet ezsurf isosurface |
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49 dellistener findall linkprop |
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50 diffuse gcbf plotmatrix |
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51 |
| 8737 | 52 ** New experimental OpenGL/FLTK based plotting system. |
| 53 | |
| 54 An experimental plotting system based on OpenGL and the FLTK | |
| 55 toolkit is now part of Octave. This backend is disabled by | |
| 56 default. You can switch to using it with the command | |
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57 |
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58 backend ("fltk") |
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59 |
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60 for all future figures or for a particular figure with the command |
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61 |
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62 backend (h, "fltk") |
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63 |
| 8737 | 64 where "h" is a valid figure handle. Please note that this backend |
| 65 does not yet support text objects. Obviously, this is a necessary | |
| 66 feature before it can be considered usable. We are looking for | |
| 67 volunteers to help implement this missing feature. | |
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68 |
| 8737 | 69 ** Functions providing direct access to gnuplot have been removed. |
| 70 | |
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71 The functions __gnuplot_plot__, __gnuplot_set__, __gnuplot_raw__, |
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72 __gnuplot_show__, __gnuplot_replot__, __gnuplot_splot__, |
| 8737 | 73 __gnuplot_save_data__ and __gnuplot_send_inline_data__ have been |
| 74 removed from Octave. These function were incompatible with the | |
| 75 high level graphics handle code. | |
| 6329 | 76 |
| 8885 | 77 ** The Control, Finance and Quaternion functions have been removed. |
| 78 | |
| 79 These functions are now available as separate packages from | |
| 80 | |
| 81 http://octave.sourceforge.net/packages.html | |
| 82 | |
| 83 and can be reinstalled using the Octave package manager (see | |
| 84 the pkg function). | |
| 85 | |
| 86 ** Specific sparse matrix functions removed. | |
| 87 | |
| 88 The following functions, which handled only sparse matrices have | |
| 89 been removed. Instead of calling these functions directly, you | |
| 90 should use the corresponding function without the "sp" prefix. | |
| 8737 | 91 |
| 8885 | 92 spatan2 spcumsum spkron spprod |
| 93 spchol spdet splchol spqr | |
| 94 spchol2inv spdiag splu spsum | |
| 95 spcholinv spfind spmax spsumsqk | |
| 96 spcumprod spinv spmin | |
| 97 | |
| 98 ** Improvements to the debugger. | |
| 99 | |
| 100 The interactive debugging features have been improved. Stopping | |
| 101 on statements with dbstop should work correctly now. Stepping | |
| 102 into and over functions, and stepping one statement at a time | |
| 103 (with dbstep) now works. Moving up and down the call stack with | |
| 104 dbup and dbdown now works. The dbstack function is now available | |
| 105 to print the current function call stack. The new dbquit function | |
| 106 is available to exit the debugging mode. | |
| 107 | |
| 108 ** Improved traceback error messages. | |
| 109 | |
| 110 Traceback error messages are much more concise and easier to | |
| 111 understand. They now display information about the function call | |
| 112 stack instead of the stack of all statements that were active at | |
| 113 the point of the error. | |
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114 |
| 8737 | 115 ** Object Oriented Programming. |
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116 |
| 8737 | 117 Octave now includes OOP features and the user can create their own |
| 118 class objects and overloaded functions and operators. For | |
| 119 example, all methods of a class called "myclass" will be found in | |
| 120 a directory "@myclass" on the users path. The class specific | |
| 121 versions of functions and operators take precedence over the | |
| 122 generic versions of these functions. | |
| 123 | |
| 124 New functions related to OOP include | |
| 7189 | 125 |
| 8737 | 126 class inferiorto isobject loadobj methods superiorto |
| 127 | |
| 128 See the Octave manual for more details. | |
| 7038 | 129 |
| 8747 | 130 ** Parsing of Command-style Functions. |
| 131 | |
| 132 Octave now parses command-style functions without needing to first | |
| 133 declare them with "mark_as_command". The rules for recognizing a | |
| 134 command-style function calls are | |
| 135 | |
| 136 * A command must appear as the first word in a statement, | |
| 137 followed by a space. | |
| 138 | |
| 139 * The first character after the space must not be '=' or '(' | |
| 140 | |
| 141 * The next token after the space must not look like a binary | |
| 142 operator. | |
| 143 | |
| 144 These rules should be mostly compatible with the way Matlab parses | |
| 145 command-style function calls and allow users to define commands in | |
| 146 .m files without having to mark them as commands. | |
| 147 | |
| 148 Note that previous versions of Octave allowed expressions like | |
| 149 | |
| 150 x = load -text foo.dat | |
| 151 | |
| 152 but an expression like this will now generate a parse error. In | |
| 153 order to assign the value returned by a function to a variable, | |
| 154 you must use the normal function call syntax: | |
| 155 | |
| 156 x = load ("-text", "foo.dat"); | |
| 157 | |
| 8737 | 158 ** Block comments. |
| 159 | |
| 8747 | 160 Commented code can be between matching "#{" and "#}" or "%{" and |
| 161 "%}" markers, even if the commented code spans several line. This | |
| 162 allows blocks code to be commented, without needing to comment | |
| 163 each line. For example, | |
| 5814 | 164 |
| 8747 | 165 function [s, t] = func (x, y) |
| 166 s = 2 * x; | |
| 167 #{ | |
| 168 s *= y; | |
| 169 t = y + x; | |
| 170 #} | |
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171 endfunction |
| 5814 | 172 |
| 8747 | 173 the lines "s *= y;" and "t = y + x" will not be executed. |
| 8737 | 174 |
| 175 ** Special treatment in the parser of expressions like "a' * b". | |
| 2452 | 176 |
| 8737 | 177 In these cases the transpose is no longer explicitly formed and |
| 178 BLAS libraries are called with the transpose flagged, | |
| 179 significantly improving performance for these kinds of | |
| 180 operations. | |
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181 |
| 8737 | 182 ** Single Precision data type. |
| 2452 | 183 |
| 8737 | 184 Octave now includes a single precision data type. Single |
| 185 precision variables can be created with the "single" command, or | |
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186 from functions like ones, eye, etc. For example, |
| 5995 | 187 |
| 8737 | 188 single (1) |
| 189 ones (2, 2, "single") | |
| 190 zeros (2, 2, "single") | |
| 191 eye (2, 2, "single") | |
| 192 Inf (2, 2, "single") | |
| 193 NaN (2, 2, "single") | |
| 194 NA (2, 2, "single") | |
| 7279 | 195 |
| 8737 | 196 all create single precision variables. For compatibility with |
| 197 Matlab, mixed double/single precision operators and functions | |
| 198 return single precision types. | |
| 199 | |
| 200 As a consequence of this addition to Octave the internal | |
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201 representation of the double precision NA value has changed, and |
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202 so users that make use of data generated by Octave with R or |
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203 visa-versa are warned that compatibility might not be assured. |
| 7279 | 204 |
| 8737 | 205 ** Improved array indexing. |
| 206 | |
| 207 The underlying code used for indexing of arrays has been | |
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208 completely rewritten and indexing is now significantly faster. |
| 8737 | 209 |
| 8755 | 210 ** Improved memory management. |
| 211 | |
| 212 Octave will now attempt to share data in some cases where previously | |
| 213 a copy would be made, such as certain array slicing operations or | |
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214 conversions between cells, structs and cs-lists. This usually reduces |
| 8755 | 215 both time and memory consumption. |
| 9128 | 216 Also, Octave will now attempt to detect and optimize usage of a vector |
| 217 as a stack, when elements are being repeatedly inserted at/removed from | |
| 218 the end of the vector. | |
| 8755 | 219 |
| 8738 | 220 ** Improved performance for reduction operations. |
| 221 | |
| 8755 | 222 The performance of the sum, prod, sumsq, cumsum, cumprod, any, all, |
| 223 max and min functions has been significantly improved. | |
| 8738 | 224 |
| 9006 | 225 ** Sorting and searching. |
| 226 | |
| 227 The performance of sort has been improved, especially when sorting | |
| 228 indices are requested. An efficient built-in issorted implementation | |
| 229 was added. sortrows now uses a more efficient algorithm, especially | |
| 230 in the homegeneous case. lookup is now a built-in function performing | |
| 231 a binary search, optimized for long runs of close elements. Lookup | |
| 232 also works with cell arrays of strings. | |
| 233 | |
| 234 ** Range arithmetics | |
| 235 | |
| 236 For some operations on ranges, Octave will attempt to keep the result as a | |
| 237 range. These include negation, adding a scalar, subtracting a scalar, and | |
| 238 multiplying by a scalar. Ranges with zero increment are allowed and can be | |
| 239 constructed using the built-in function `ones'. | |
| 240 | |
| 241 ** Various performance improvements. | |
| 242 | |
| 243 Performance of a number of other built-in operations and functions was | |
| 244 improved, including: | |
| 245 | |
| 246 * logical operations | |
| 247 * comparison operators | |
| 248 * element-wise power | |
| 249 * accumarray | |
| 250 * cellfun | |
| 251 * isnan | |
| 252 * isinf | |
| 253 * isfinite | |
| 254 * nchoosek | |
| 255 * repmat | |
| 256 * strcmp | |
| 257 | |
| 8737 | 258 ** 64-bit integer arithmetic. |
| 259 | |
| 260 Arithmetic with 64-bit integers (int64 and uint64 types) is fully | |
| 261 supported, with saturation semantics like the other integer types. | |
| 262 Performance of most integer arithmetic operations has been | |
| 263 improved by using integer arithmetic directly. Previously, Octave | |
| 264 performed integer math with saturation semantics by converting the | |
| 265 operands to double precision, performing the operation, and then | |
| 266 converting the result back to an integer value, truncating if | |
| 267 necessary. | |
| 268 | |
| 8885 | 269 ** Diagonal and permutation matrices. |
| 270 | |
| 271 The interpreter can now treat diagonal and permutation matrices as | |
| 272 special objects that store only the non-zero elements, rather than | |
| 273 general full matrices. Therefore, it is now possible to construct | |
| 274 and use these matrices in linear algebra without suffering a | |
| 275 performance penalty due to storing large numbers of zero elements. | |
| 276 | |
| 277 ** Improvements to fsolve. | |
| 278 | |
| 279 The fsolve function now accepts an option structure argument (see | |
| 280 also the optimset function). The INFO values returned from fsolve | |
| 281 have changed to be compatible with Matlab's fsolve function. | |
| 282 Additionally, fsolve is now able to solve overdetermined systems, | |
| 283 complex-differentiable complex systems, systems with a sparse | |
| 284 jacobian and can work in single precision if given single precision | |
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285 inputs. It can also be called recursively. |
| 8885 | 286 |
| 8737 | 287 ** Improvements to the norm function. |
| 288 | |
| 289 The norm function is now able to compute row or column norms of a | |
| 290 matrix in a single call, as well as general matrix p-norms. | |
| 291 | |
| 292 ** New functions for computing some eigenvalues or singular values. | |
| 293 | |
| 294 The eigs and svds functions have been included in Octave. These | |
| 295 functions require the ARPACK library (now distributed under a | |
| 296 GPL-compatible license). | |
| 297 | |
| 298 ** New QR and Cholesky factorization updating functions. | |
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299 |
| 8737 | 300 choldelete cholshift qrdelete qrshift |
| 301 cholinsert cholupdate qrinsert qrupdate | |
| 302 | |
| 303 ** New quadrature functions. | |
| 304 | |
| 305 dblquad quadgk quadv triplequad | |
| 306 | |
| 8885 | 307 ** New functions for reading and writing images. |
| 308 | |
| 309 The imwrite and imread functions have been included in Octave. | |
| 310 These functions require the GraphicsMagick library. The new | |
| 311 function imfinfo provides information about an image file (size, | |
| 312 type, colors, etc.) | |
| 313 | |
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314 ** The input_event_hook function has been replaced by the pair of |
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315 functions add_input_event_hook and remove_input_event_hook so that |
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316 more than one hook function may be installed at a time. |
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317 |
| 8737 | 318 ** Other miscellaneous new functions. |
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319 |
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320 addtodate hypot reallog |
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321 bicgstab idivide realpow |
| 9006 | 322 cellslices info realsqrt |
| 323 cgs interp1q rectint | |
| 324 command_line_path isdebugmode regexptranslate | |
| 325 contrast isfloat restoredefaultpath | |
| 326 convn isstrprop roundb | |
| 327 cummin log1p rundemos | |
| 328 cummax lsqnonneg runlength | |
| 329 datetick matlabroot saveobj | |
| 330 display namelengthmax spaugment | |
| 331 expm1 nargoutchk strchr | |
| 332 filemarker pathdef strvcat | |
| 333 fstat perl subspace | |
| 334 full prctile symvar | |
| 335 fzero quantile treelayout | |
| 336 genvarname re_read_readline_init_file validatestring | |
| 337 histc | |
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338 |
| 8885 | 339 ** Changes to strcat. |
| 340 | |
| 341 The strcat function is now compatible with Matlab's strcat | |
| 342 function, which removes trailing whitespace when concatenating | |
| 343 character strings. For example | |
| 344 | |
| 345 strcat ('foo ', 'bar') | |
| 346 ==> 'foobar' | |
| 347 | |
| 348 The new function cstrcat provides the previous behavior of | |
| 349 Octave's strcat. | |
| 350 | |
| 351 ** Improvements to the help functions. | |
| 352 | |
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Rik <rdrider0-list@yahoo.com>
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353 The help system has been mostly re-implemented in .m files to make |
| 8885 | 354 it easier to modify. Performance of the lookfor function has been |
| 355 greatly improved by caching the help text from all functions that | |
| 356 are distributed with Octave. The pkg function has been modified | |
| 357 to generate cache files for external packages when they are | |
| 358 installed. | |
| 359 | |
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John W. Eaton <jwe@octave.org>
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360 ** Deprecated functions. |
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John W. Eaton <jwe@octave.org>
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361 |
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John W. Eaton <jwe@octave.org>
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362 The following functions were deprecated in Octave 3.0 and will be |
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John W. Eaton <jwe@octave.org>
parents:
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363 removed in Octave 3.4 (or whatever version is the second major |
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John W. Eaton <jwe@octave.org>
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364 release after 3.0): |
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John W. Eaton <jwe@octave.org>
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365 |
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366 beta_cdf geometric_pdf pascal_pdf |
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367 beta_inv geometric_rnd pascal_rnd |
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368 beta_pdf hypergeometric_cdf poisson_cdf |
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John W. Eaton <jwe@octave.org>
parents:
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369 beta_rnd hypergeometric_inv poisson_inv |
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John W. Eaton <jwe@octave.org>
parents:
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370 binomial_cdf hypergeometric_pdf poisson_pdf |
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parents:
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371 binomial_inv hypergeometric_rnd poisson_rnd |
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372 binomial_pdf intersection polyinteg |
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John W. Eaton <jwe@octave.org>
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373 binomial_rnd is_bool setstr |
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374 chisquare_cdf is_complex struct_contains |
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John W. Eaton <jwe@octave.org>
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375 chisquare_inv is_list struct_elements |
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376 chisquare_pdf is_matrix t_cdf |
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377 chisquare_rnd is_scalar t_inv |
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378 clearplot is_square t_pdf |
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379 clg is_stream t_rnd |
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380 com2str is_struct uniform_cdf |
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381 exponential_cdf is_symmetric uniform_inv |
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382 exponential_inv is_vector uniform_pdf |
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383 exponential_pdf isstr uniform_rnd |
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John W. Eaton <jwe@octave.org>
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384 exponential_rnd lognormal_cdf weibcdf |
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John W. Eaton <jwe@octave.org>
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385 f_cdf lognormal_inv weibinv |
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386 f_inv lognormal_pdf weibpdf |
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John W. Eaton <jwe@octave.org>
parents:
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387 f_pdf lognormal_rnd weibrnd |
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John W. Eaton <jwe@octave.org>
parents:
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388 f_rnd meshdom weibull_cdf |
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John W. Eaton <jwe@octave.org>
parents:
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389 gamma_cdf normal_cdf weibull_inv |
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John W. Eaton <jwe@octave.org>
parents:
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390 gamma_inv normal_inv weibull_pdf |
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John W. Eaton <jwe@octave.org>
parents:
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391 gamma_pdf normal_pdf weibull_rnd |
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John W. Eaton <jwe@octave.org>
parents:
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392 gamma_rnd normal_rnd wiener_rnd |
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John W. Eaton <jwe@octave.org>
parents:
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393 geometric_cdf pascal_cdf |
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John W. Eaton <jwe@octave.org>
parents:
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394 geometric_inv pascal_inv |
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John W. Eaton <jwe@octave.org>
parents:
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395 |
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John W. Eaton <jwe@octave.org>
parents:
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396 The following functions are now deprecated in Octave 3.2 and will |
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John W. Eaton <jwe@octave.org>
parents:
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397 be removed in Octave 3.6 (or whatever version is the second major |
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John W. Eaton <jwe@octave.org>
parents:
8885
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398 release after 3.2): |
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John W. Eaton <jwe@octave.org>
parents:
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399 |
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John W. Eaton <jwe@octave.org>
parents:
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400 create_set spcholinv spmax |
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John W. Eaton <jwe@octave.org>
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401 dmult spcumprod spmin |
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John W. Eaton <jwe@octave.org>
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402 iscommand spcumsum spprod |
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John W. Eaton <jwe@octave.org>
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403 israwcommand spdet spqr |
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John W. Eaton <jwe@octave.org>
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404 lchol spdiag spsum |
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John W. Eaton <jwe@octave.org>
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405 loadimage spfind spsumsq |
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406 mark_as_command spinv str2mat |
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407 mark_as_rawcommand spkron unmark_command |
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408 spatan2 splchol unmark_rawcommand |
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409 spchol split |
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410 spchol2inv splu |
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411 |
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86dae6e5b83c
Initial update of NEWS for 3.2 release
David Bateman <dbateman@free.fr>
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412 See NEWS.3 for old news. |