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annotate NEWS @ 8738:c32e710407ee
NEWS: another update
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Fri, 13 Feb 2009 15:36:43 -0500 |
| parents | ae51dc447bab |
| children | 86cfcf133a19 |
| 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 | |
| 25 addlistener dellistener ezsurf ishghandle | |
| 26 addproperty ezcontour ezsurfc linkprop | |
| 27 allchild ezcontourf findall plotmatrix | |
| 28 available_backends ezmesh gcbf refresh | |
| 29 backend ezmeshc gcbo refreshdata | |
| 30 cla ezplot ginput surfl | |
| 31 clabel ezplot3 gtext waitforbuttonpress | |
| 32 comet ezpolar intwarning | |
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33 |
| 8737 | 34 ** Improvements to the debugger. |
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35 |
| 8737 | 36 The interactive debugging features have been improved. Stopping |
| 37 on statements with dbstop should work correctly now. Stepping | |
| 38 into and over functions, and stepping one statement at a time | |
| 39 (with dbstep) now works. Moving up and down the call stack with | |
| 40 dbup and dbdown now works. The dbstack function is now available | |
| 41 to print the current function call stack. The new dbquit function | |
| 42 is available to exit the debugging mode. | |
| 43 | |
| 44 ** New experimental OpenGL/FLTK based plotting system. | |
| 45 | |
| 46 An experimental plotting system based on OpenGL and the FLTK | |
| 47 toolkit is now part of Octave. This backend is disabled by | |
| 48 default. You can switch to using it with the command | |
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49 |
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50 backend ("fltk") |
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51 |
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52 for all future figures or for a particular figure with the command |
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53 |
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54 backend (h, "fltk") |
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55 |
| 8737 | 56 where "h" is a valid figure handle. Please note that this backend |
| 57 does not yet support text objects. Obviously, this is a necessary | |
| 58 feature before it can be considered usable. We are looking for | |
| 59 volunteers to help implement this missing feature. | |
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60 |
| 8737 | 61 ** Functions providing direct access to gnuplot have been removed. |
| 62 | |
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63 The functions __gnuplot_plot__, __gnuplot_set__, __gnuplot_raw__, |
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64 __gnuplot_show__, __gnuplot_replot__, __gnuplot_splot__, |
| 8737 | 65 __gnuplot_save_data__ and __gnuplot_send_inline_data__ have been |
| 66 removed from Octave. These function were incompatible with the | |
| 67 high level graphics handle code. | |
| 6329 | 68 |
| 8737 | 69 ** Improvements to fsolve. |
| 70 | |
| 71 The fsolve function now accepts an option structure argument (see | |
| 72 also the optimset function). The INFO values returned from fsolve | |
| 73 have changed to be compatible with Matlab's fsolve function. | |
| 8396 | 74 Additionally, fsolve is now able to solve overdetermined systems. |
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75 |
| 8737 | 76 ** Object Oriented Programming. |
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77 |
| 8737 | 78 Octave now includes OOP features and the user can create their own |
| 79 class objects and overloaded functions and operators. For | |
| 80 example, all methods of a class called "myclass" will be found in | |
| 81 a directory "@myclass" on the users path. The class specific | |
| 82 versions of functions and operators take precedence over the | |
| 83 generic versions of these functions. | |
| 84 | |
| 85 New functions related to OOP include | |
| 7189 | 86 |
| 8737 | 87 class inferiorto isobject loadobj methods superiorto |
| 88 | |
| 89 See the Octave manual for more details. | |
| 7038 | 90 |
| 8737 | 91 ** Block comments. |
| 92 | |
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93 Commented code can be between matching "%{" and "%}" markers, even |
| 8737 | 94 if the commented code spans several line. This allows blocks code |
| 95 to be commented, without needing to comment each line. For | |
| 96 example, | |
| 5814 | 97 |
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98 function y = func (x) |
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99 y = 2 * x; |
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100 %{ |
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101 y += 1; |
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102 %} |
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103 endfunction |
| 5814 | 104 |
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parents:
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105 the line "y += 1;" will not be executed. |
| 8737 | 106 |
| 107 ** The Control, Finance and Quaternion functions have been removed. | |
| 108 | |
| 109 These functions are now available as separate packages from | |
| 110 | |
| 111 http://octave.sourceforge.net/packages.html | |
| 2452 | 112 |
| 8737 | 113 and can be reinstalled using the Octave package manager (see |
| 114 the pkg function). | |
| 115 | |
| 116 ** Special treatment in the parser of expressions like "a' * b". | |
| 2452 | 117 |
| 8737 | 118 In these cases the transpose is no longer explicitly formed and |
| 119 BLAS libraries are called with the transpose flagged, | |
| 120 significantly improving performance for these kinds of | |
| 121 operations. | |
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122 |
| 8737 | 123 ** Single Precision data type. |
| 2452 | 124 |
| 8737 | 125 Octave now includes a single precision data type. Single |
| 126 precision variables can be created with the "single" command, or | |
| 127 from function like ones, etc. For example | |
| 5995 | 128 |
| 8737 | 129 single (1) |
| 130 ones (2, 2, "single") | |
| 131 zeros (2, 2, "single") | |
| 132 eye (2, 2, "single") | |
| 133 Inf (2, 2, "single") | |
| 134 NaN (2, 2, "single") | |
| 135 NA (2, 2, "single") | |
| 7279 | 136 |
| 8737 | 137 all create single precision variables. For compatibility with |
| 138 Matlab, mixed double/single precision operators and functions | |
| 139 return single precision types. | |
| 140 | |
| 141 As a consequence of this addition to Octave the internal | |
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142 representation of the double precision NA value has changed, and |
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143 so users that make use of data generated by Octave with R or |
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144 visa-versa are warned that compatibility might not be assured. |
| 7279 | 145 |
| 8737 | 146 ** Improved array indexing. |
| 147 | |
| 148 The underlying code used for indexing of arrays has been | |
| 149 completely rewritten and so the indexing of arrays is now | |
| 150 significantly faster. | |
| 151 | |
| 8738 | 152 ** Improved performance for reduction operations. |
| 153 | |
| 154 The performance of the sum, prod, sumsq, cumsum, and cumprod | |
| 155 functions has been significantly improved. | |
| 156 | |
| 8737 | 157 ** Diagonal and permutation matrices. |
| 158 | |
| 159 The interpreter can now treat diagonal and permutation matrices as | |
| 160 special objects that store only the non-zero elements, rather than | |
| 161 general full matrices. Therefore, it is now possible to construct | |
| 162 and use these matrices in linear algebra without suffering a | |
| 163 performance penalty due to storing large numbers of zero elements. | |
| 164 | |
| 165 ** 64-bit integer arithmetic. | |
| 166 | |
| 167 Arithmetic with 64-bit integers (int64 and uint64 types) is fully | |
| 168 supported, with saturation semantics like the other integer types. | |
| 169 Performance of most integer arithmetic operations has been | |
| 170 improved by using integer arithmetic directly. Previously, Octave | |
| 171 performed integer math with saturation semantics by converting the | |
| 172 operands to double precision, performing the operation, and then | |
| 173 converting the result back to an integer value, truncating if | |
| 174 necessary. | |
| 175 | |
| 176 ** Improvements to the norm function. | |
| 177 | |
| 178 The norm function is now able to compute row or column norms of a | |
| 179 matrix in a single call, as well as general matrix p-norms. | |
| 180 | |
| 181 ** New functions for reading and writing images. | |
| 182 | |
| 183 The imwrite and imread function have been included in Octave. | |
| 184 These functions require the GraphicsMagick library. The new | |
| 185 function imfinfo provides information about an image file (size, | |
| 186 type, colors, etc.) | |
| 187 | |
| 188 ** New functions for computing some eigenvalues or singular values. | |
| 189 | |
| 190 The eigs and svds functions have been included in Octave. These | |
| 191 functions require the ARPACK library (now distributed under a | |
| 192 GPL-compatible license). | |
| 193 | |
| 194 ** Changes to strcat. | |
| 8292 | 195 |
| 8737 | 196 The strcat function is now compatible with Matlab's strcat |
| 197 function, which removes trailing whitespace when concatenating | |
| 198 character strings. For example | |
| 199 | |
| 200 strcat ('foo ', 'bar') | |
| 201 ==> 'foobar' | |
| 202 | |
| 203 The new function cstrcat provides the previous behavior of | |
| 204 Octave's strcat. | |
| 205 | |
| 206 ** Specific sparse matrix functions removed. | |
| 207 | |
| 208 The following functions, which handled only sparse matrices have | |
| 209 been removed. Instead of calling these functions directly, you | |
| 210 should use the corresponding function without the "sp" prefix. | |
| 211 | |
| 212 spatan2 spcumsum spkron spprod | |
| 213 spchol spdet splchol spqr | |
| 214 spchol2inv spdiag splu spsum | |
| 215 spcholinv spfind spmax spsumsqk | |
| 216 spcumprod spinv spmin | |
| 217 | |
| 218 ** New QR and Cholesky factorization updating functions. | |
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219 |
| 8737 | 220 choldelete cholshift qrdelete qrshift |
| 221 cholinsert cholupdate qrinsert qrupdate | |
| 222 | |
| 223 ** New quadrature functions. | |
| 224 | |
| 225 dblquad quadgk quadv triplequad | |
| 226 | |
| 227 ** Other miscellaneous new functions. | |
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228 |
| 8737 | 229 addtodate interp1q rectint |
| 230 bicgstab isdebugmode regexptranslate | |
| 231 cgs isfloat restoredefaultpath | |
| 232 command_line_path isstrprop roundb | |
| 233 contrast log1p rundemos | |
| 234 convn lsqnonneg runlength | |
| 235 datetick matlabroot saveobj | |
| 236 display namelengthmax spaugment | |
| 237 expm1 nargoutchk strchr | |
| 238 filemarker pathdef strvcat | |
| 239 fstat perl subspace | |
| 240 full prctile symvar | |
| 241 fzero quantile treelayout | |
| 242 genvarname re_read_readline_init_file validatestring | |
| 243 hypot reallog which | |
| 244 idivide realpow | |
| 245 info realsqrt | |
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246 |
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247 See NEWS.3 for old news. |