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annotate NEWS @ 8755:59c0fde890a0
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| author | Jaroslav Hajek <highegg@gmail.com> |
|---|---|
| date | Mon, 16 Feb 2009 10:53:46 +0100 |
| parents | 5a7494ee68a3 |
| children | 949708f930d0 |
| rev | line source |
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1 Summary of important user-visible changes for version 3.2: |
| 5913 | 2 --------------------------------------------------------- |
| 2452 | 3 |
| 8737 | 4 ** Compatibility with Matlab graphics has been improved. |
| 6329 | 5 |
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6 The hggroup object and associated listener callback functions have |
| 8737 | 7 been added allowing the inclusion of group objects. Data sources |
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8 have been added to these group objects such that |
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9 |
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10 x = 0:0.1:10; |
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11 y = sin (x); |
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12 plot (x, y, "ydatasource", "y"); |
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13 for i = 1 : 100 |
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14 pause(0.1) |
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15 y = sin (x + 0.1 * i); |
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16 refreshdata(); |
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17 endfor |
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18 |
| 8737 | 19 works as expected. This capability has be used to introduce |
| 20 stem-series, bar-series, etc. objects for better Matlab | |
| 21 compatibility. | |
| 22 | |
| 23 ** New graphics functions: | |
| 24 | |
| 8747 | 25 addlistener diffuse ezsurfc plotmatrix |
| 26 addproperty ezcontour findall refresh | |
| 27 allchild ezcontourf gcbf refreshdata | |
| 28 available_backends ezmesh gcbo specular | |
| 29 backend ezmeshc ginput surfl | |
| 30 cla ezplot gtext waitforbuttonpress | |
| 31 clabel ezplot3 intwarning | |
| 32 comet ezpolar ishghandle | |
| 33 dellistener ezsurf linkprop | |
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34 |
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35 ** Improvements to the debugger. |
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36 |
| 8737 | 37 The interactive debugging features have been improved. Stopping |
| 38 on statements with dbstop should work correctly now. Stepping | |
| 39 into and over functions, and stepping one statement at a time | |
| 40 (with dbstep) now works. Moving up and down the call stack with | |
| 41 dbup and dbdown now works. The dbstack function is now available | |
| 42 to print the current function call stack. The new dbquit function | |
| 43 is available to exit the debugging mode. | |
| 44 | |
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45 ** Improved traceback error messages. |
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46 |
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47 Traceback error messages are much more concise and easier to |
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48 understand. They now display information about the function call |
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49 stack instead of the stack of all statements that were active at |
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50 the point of the error. |
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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 |
| 8737 | 77 ** Improvements to fsolve. |
| 78 | |
| 79 The fsolve function now accepts an option structure argument (see | |
| 80 also the optimset function). The INFO values returned from fsolve | |
| 81 have changed to be compatible with Matlab's fsolve function. | |
| 8755 | 82 Additionally, fsolve is now able to solve overdetermined systems, |
| 83 complex-differentiable complex systems, systems with a sparse | |
| 84 jacobian and can work in single precision if given single precision | |
| 85 inputs. It can also be called recursively. | |
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86 |
| 8737 | 87 ** Object Oriented Programming. |
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88 |
| 8737 | 89 Octave now includes OOP features and the user can create their own |
| 90 class objects and overloaded functions and operators. For | |
| 91 example, all methods of a class called "myclass" will be found in | |
| 92 a directory "@myclass" on the users path. The class specific | |
| 93 versions of functions and operators take precedence over the | |
| 94 generic versions of these functions. | |
| 95 | |
| 96 New functions related to OOP include | |
| 7189 | 97 |
| 8737 | 98 class inferiorto isobject loadobj methods superiorto |
| 99 | |
| 100 See the Octave manual for more details. | |
| 7038 | 101 |
| 8747 | 102 ** Parsing of Command-style Functions. |
| 103 | |
| 104 Octave now parses command-style functions without needing to first | |
| 105 declare them with "mark_as_command". The rules for recognizing a | |
| 106 command-style function calls are | |
| 107 | |
| 108 * A command must appear as the first word in a statement, | |
| 109 followed by a space. | |
| 110 | |
| 111 * The first character after the space must not be '=' or '(' | |
| 112 | |
| 113 * The next token after the space must not look like a binary | |
| 114 operator. | |
| 115 | |
| 116 These rules should be mostly compatible with the way Matlab parses | |
| 117 command-style function calls and allow users to define commands in | |
| 118 .m files without having to mark them as commands. | |
| 119 | |
| 120 Note that previous versions of Octave allowed expressions like | |
| 121 | |
| 122 x = load -text foo.dat | |
| 123 | |
| 124 but an expression like this will now generate a parse error. In | |
| 125 order to assign the value returned by a function to a variable, | |
| 126 you must use the normal function call syntax: | |
| 127 | |
| 128 x = load ("-text", "foo.dat"); | |
| 129 | |
| 8737 | 130 ** Block comments. |
| 131 | |
| 8747 | 132 Commented code can be between matching "#{" and "#}" or "%{" and |
| 133 "%}" markers, even if the commented code spans several line. This | |
| 134 allows blocks code to be commented, without needing to comment | |
| 135 each line. For example, | |
| 5814 | 136 |
| 8747 | 137 function [s, t] = func (x, y) |
| 138 s = 2 * x; | |
| 139 #{ | |
| 140 s *= y; | |
| 141 t = y + x; | |
| 142 #} | |
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143 endfunction |
| 5814 | 144 |
| 8747 | 145 the lines "s *= y;" and "t = y + x" will not be executed. |
| 8737 | 146 |
| 147 ** The Control, Finance and Quaternion functions have been removed. | |
| 148 | |
| 149 These functions are now available as separate packages from | |
| 150 | |
| 151 http://octave.sourceforge.net/packages.html | |
| 2452 | 152 |
| 8737 | 153 and can be reinstalled using the Octave package manager (see |
| 154 the pkg function). | |
| 155 | |
| 156 ** Special treatment in the parser of expressions like "a' * b". | |
| 2452 | 157 |
| 8737 | 158 In these cases the transpose is no longer explicitly formed and |
| 159 BLAS libraries are called with the transpose flagged, | |
| 160 significantly improving performance for these kinds of | |
| 161 operations. | |
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162 |
| 8737 | 163 ** Single Precision data type. |
| 2452 | 164 |
| 8737 | 165 Octave now includes a single precision data type. Single |
| 166 precision variables can be created with the "single" command, or | |
| 167 from function like ones, etc. For example | |
| 5995 | 168 |
| 8737 | 169 single (1) |
| 170 ones (2, 2, "single") | |
| 171 zeros (2, 2, "single") | |
| 172 eye (2, 2, "single") | |
| 173 Inf (2, 2, "single") | |
| 174 NaN (2, 2, "single") | |
| 175 NA (2, 2, "single") | |
| 7279 | 176 |
| 8737 | 177 all create single precision variables. For compatibility with |
| 178 Matlab, mixed double/single precision operators and functions | |
| 179 return single precision types. | |
| 180 | |
| 181 As a consequence of this addition to Octave the internal | |
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182 representation of the double precision NA value has changed, and |
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183 so users that make use of data generated by Octave with R or |
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184 visa-versa are warned that compatibility might not be assured. |
| 7279 | 185 |
| 8737 | 186 ** Improved array indexing. |
| 187 | |
| 188 The underlying code used for indexing of arrays has been | |
| 189 completely rewritten and so the indexing of arrays is now | |
| 190 significantly faster. | |
| 191 | |
| 8755 | 192 ** Improved memory management. |
| 193 | |
| 194 Octave will now attempt to share data in some cases where previously | |
| 195 a copy would be made, such as certain array slicing operations or | |
| 196 conversions between cells, structs and cs-lists. This usually reduces | |
| 197 both time and memory consumption. | |
| 198 | |
| 8738 | 199 ** Improved performance for reduction operations. |
| 200 | |
| 8755 | 201 The performance of the sum, prod, sumsq, cumsum, cumprod, any, all, |
| 202 max and min functions has been significantly improved. | |
| 8738 | 203 |
| 8737 | 204 ** Diagonal and permutation matrices. |
| 205 | |
| 206 The interpreter can now treat diagonal and permutation matrices as | |
| 207 special objects that store only the non-zero elements, rather than | |
| 208 general full matrices. Therefore, it is now possible to construct | |
| 209 and use these matrices in linear algebra without suffering a | |
| 210 performance penalty due to storing large numbers of zero elements. | |
| 211 | |
| 212 ** 64-bit integer arithmetic. | |
| 213 | |
| 214 Arithmetic with 64-bit integers (int64 and uint64 types) is fully | |
| 215 supported, with saturation semantics like the other integer types. | |
| 216 Performance of most integer arithmetic operations has been | |
| 217 improved by using integer arithmetic directly. Previously, Octave | |
| 218 performed integer math with saturation semantics by converting the | |
| 219 operands to double precision, performing the operation, and then | |
| 220 converting the result back to an integer value, truncating if | |
| 221 necessary. | |
| 222 | |
| 223 ** Improvements to the norm function. | |
| 224 | |
| 225 The norm function is now able to compute row or column norms of a | |
| 226 matrix in a single call, as well as general matrix p-norms. | |
| 227 | |
| 228 ** New functions for reading and writing images. | |
| 229 | |
| 230 The imwrite and imread function have been included in Octave. | |
| 231 These functions require the GraphicsMagick library. The new | |
| 232 function imfinfo provides information about an image file (size, | |
| 233 type, colors, etc.) | |
| 234 | |
| 235 ** New functions for computing some eigenvalues or singular values. | |
| 236 | |
| 237 The eigs and svds functions have been included in Octave. These | |
| 238 functions require the ARPACK library (now distributed under a | |
| 239 GPL-compatible license). | |
| 240 | |
| 241 ** Changes to strcat. | |
| 8292 | 242 |
| 8737 | 243 The strcat function is now compatible with Matlab's strcat |
| 244 function, which removes trailing whitespace when concatenating | |
| 245 character strings. For example | |
| 246 | |
| 247 strcat ('foo ', 'bar') | |
| 248 ==> 'foobar' | |
| 249 | |
| 250 The new function cstrcat provides the previous behavior of | |
| 251 Octave's strcat. | |
| 252 | |
| 253 ** Specific sparse matrix functions removed. | |
| 254 | |
| 255 The following functions, which handled only sparse matrices have | |
| 256 been removed. Instead of calling these functions directly, you | |
| 257 should use the corresponding function without the "sp" prefix. | |
| 258 | |
| 259 spatan2 spcumsum spkron spprod | |
| 260 spchol spdet splchol spqr | |
| 261 spchol2inv spdiag splu spsum | |
| 262 spcholinv spfind spmax spsumsqk | |
| 263 spcumprod spinv spmin | |
| 264 | |
| 265 ** New QR and Cholesky factorization updating functions. | |
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266 |
| 8737 | 267 choldelete cholshift qrdelete qrshift |
| 268 cholinsert cholupdate qrinsert qrupdate | |
| 269 | |
| 270 ** New quadrature functions. | |
| 271 | |
| 272 dblquad quadgk quadv triplequad | |
| 273 | |
| 274 ** Other miscellaneous new functions. | |
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275 |
| 8747 | 276 addtodate info realpow |
| 277 bicgstab interp1q realsqrt | |
| 278 cgs isdebugmode rectint | |
| 279 command_line_path isfloat regexptranslate | |
| 280 contrast isstrprop restoredefaultpath | |
| 281 convn log1p roundb | |
| 282 datetick lsqnonneg rundemos | |
| 283 display matlabroot runlength | |
| 284 expm1 namelengthmax saveobj | |
| 285 filemarker nargoutchk spaugment | |
| 286 fstat pathdef strchr | |
| 287 full perl strvcat | |
| 288 fzero prctile subspace | |
| 289 genvarname quantile symvar | |
| 290 hypot re_read_readline_init_file treelayout | |
| 291 idivide reallog validatestring | |
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292 |
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293 See NEWS.3 for old news. |