Mercurial > octave-libgccjit
annotate NEWS @ 13919:8cb79741769d
doc: Update NEWS file with more 3.6.0 features
* NEWS: Update file with more 3.6.0 features
author | Rik <octave@nomad.inbox5.com> |
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date | Tue, 22 Nov 2011 20:10:22 -0800 |
parents | 40e32fe44aaa |
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1 Summary of important user-visible changes for version 3.6: |
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2 --------------------------------------------------------- |
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3 |
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4 ** The PCRE library is now required to build Octave. |
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5 |
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6 ** Octave now features a profiler, thanks to the work of Daniel Kraft |
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7 under the Google Summer of Code mentorship program. The manual has |
13262 | 8 been updated to reflect this addition. The new user-visible |
9 functions are profexplore, profile, and profshow. | |
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10 |
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11 ** Overhaul of statistical distribution functions |
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12 |
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13 Functions now return "single" outputs for inputs of class "single". |
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14 |
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15 75% reduction in memory usage through use of logical indexing. |
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16 |
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17 Random sample functions now use the same syntax as rand() and accept |
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18 a comma separated list of dimensions or a dimension vector. |
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19 |
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20 Functions have been made Matlab-compatible with regard to special |
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21 cases (probability on boundaries, probabilities for values outside |
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22 distribution, etc.). This may cause subtle changes to existing |
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23 scripts. |
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24 |
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25 negative binomial function has been extended to real, non-integer inputs. |
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26 discrete_inv() now returns v(1) for 0 instead of NaN. |
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27 nbincdf() recoded to use closed form solution with betainc(). |
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28 |
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29 ** strread, textscan, and textread have been completely revamped. |
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30 |
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31 They now support nearly all Matlab functionality including: |
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32 |
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33 * ML-compatible whitespace and delimiter defaults |
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34 |
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35 * ML-compatible options: 'whitespace', treatasempty', |
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36 format string repeat count, user-specified comment style, uneven-length |
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37 output arrays, %n and %u conversion specifiers (provisionally) |
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38 |
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39 ** All .m string functions have been modified for better performance or greater |
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40 Matlab compatibility. Performance gains of 15X-30X have been demonstrated. |
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41 Operations on cell array of strings no longer pay quite as high a penalty |
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42 as those on 2-D character arrays. |
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43 |
13262 | 44 deblank: Now requires character or cellstr input. |
45 strtrim: Now requires character or cellstr input. | |
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46 No longer trims nulls ("\0") from string for ML compatibility. |
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47 strmatch: Follows documentation precisely and ignores trailing spaces |
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48 in pattern and in string. Note that Matlab documents this |
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49 behavior but the implementation does *not* always follow it. |
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50 substr: Now possible to specify a negative LEN option which extracts |
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51 to within LEN of the end of the string. |
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52 strtok: Now accepts cellstr input. |
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53 base2dec, bin2dec, hex2dec: Now accept cellstr inputs. |
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54 dec2base, dec2bin, dec2hex: Now accept cellstr inputs. |
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55 index, rindex: Now accept 2-D character array input. |
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56 strsplit: Now accepts 2-D character array input. |
13262 | 57 |
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58 ** Geometry functions derived from Qhull (convhull, delaunay, voronoi) |
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59 have been revamped. The options passed to the underlying qhull command |
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60 have been changed for better results or for Matlab compatibility. |
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61 |
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62 convhull : Default options are "Qt" for 2D, 3D, 4D inputs |
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63 Default options are "Qt Qx" for 5D and higher |
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64 delaunay : Default options are "Qt Qbb Qc Qz" for 2D and 3D inputs |
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65 Default options are "Qt Qbb Qc Qx" for 4D and higher |
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66 voronoi : No default arguments |
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67 |
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68 ** Date/Time functions updated. |
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69 Millisecond support with FFF format string now supported. |
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70 |
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71 datestr : Numerical formats 21, 22, 29 changed to match Matlab. |
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72 Now accepts cellstr inputs. |
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73 |
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74 ** Octave warning IDs updated |
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75 "associativity-change": removed |
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76 "complex-cmp-ops" : removed |
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77 "empty-list-elements" : removed |
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78 "fortran-indexing" : removed |
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79 "precedence-change" : removed |
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80 "string-concat" : renamed to "mixed-string-concat" |
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81 |
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82 ** Matlab-compatible preference functions added: |
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84 addpref getpref ispref rmpref setpref |
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86 ** New keyword parfor |
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87 parfor (parallel for loop) is now recognized as a valid keyword. |
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88 Implementation, however, is still mapped to an ordinary for loop. |
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89 |
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90 ** Other new functions added in 3.6.0: |
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91 |
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92 is_dq_string nthargout usejava |
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93 is_sq_string python waitbar |
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94 narginchk recycle zscore |
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95 |
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96 ** Deprecated functions. |
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97 |
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98 The following functions were deprecated in Octave 3.2 and have been |
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99 removed from Octave 3.6. |
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100 |
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101 create_set spcholinv splu |
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102 dmult spcumprod spmax |
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103 iscommand spcumsum spmin |
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104 israwcommand spdet spprod |
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105 lchol spdiag spqr |
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106 loadimage spfind spsum |
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107 mark_as_command sphcat spsumsq |
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108 mark_as_rawcommand spinv spvcat |
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109 spatan2 spkron str2mat |
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110 spchol splchol unmark_command |
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111 spchol2inv split unmark_rawcommand |
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112 |
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113 The following functions have been deprecated in Octave 3.6 and will |
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114 be removed from Octave 3.10 (or whatever version is the second major |
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115 release after 3.6): |
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116 |
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117 cut is_duplicate_entry |
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118 cor polyderiv |
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119 corrcoef studentize |
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120 __error_text__ sylvester_matrix |
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121 error_text |
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122 |
13251 | 123 Summary of important user-visible changes for version 3.4.3: |
124 ----------------------------------------------------------- | |
125 | |
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126 ** Octave 3.4.3 is a bug fixing release. |
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127 |
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128 Summary of important user-visible changes for version 3.4.2: |
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129 ----------------------------------------------------------- |
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130 |
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131 ** Octave 3.4.2 fixes some minor installation problems that affected |
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132 version 3.4.1. |
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133 |
12709 | 134 Summary of important user-visible changes for version 3.4.1: |
135 ----------------------------------------------------------- | |
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136 |
12709 | 137 ** Octave 3.4.1 is primarily a bug fixing release. |
138 | |
139 ** IMPORTANT note about binary incompatibility in this release: | |
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140 |
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141 Binary compatibility for all 3.4.x releases was originally planned, |
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142 but this is impossible for the 3.4.1 release due to a bug in the way |
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143 shared libraries were built in Octave 3.4.0. Because of this bug, |
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144 .oct files built for Octave 3.4.0 must be recompiled before they |
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145 will work with Octave 3.4.1. |
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146 |
12709 | 147 Given that there would be binary incompatibilities with shared |
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148 libraries going from Octave 3.4.0 to 3.4.1, the following |
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149 incompatible changes were also made in this release: |
12709 | 150 |
151 * The Perl Compatible Regular Expression (PCRE) library is now | |
152 required to build Octave. | |
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153 |
12712 | 154 * Octave's libraries and .oct files are now installed in |
155 subdirectories of $libdir instead of $libexecdir. | |
156 | |
12709 | 157 Any future Octave 3.4.x release versions should remain binary |
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158 compatible with Octave 3.4.1 as proper library versioning is now |
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159 being used as recommended by the libtool manual. |
12709 | 160 |
161 ** The following functions have been deprecated in Octave 3.4.1 and will | |
162 be removed from Octave 3.8 (or whatever version is the second major | |
163 release after 3.4): | |
164 | |
165 cquad is_duplicate_entry perror strerror | |
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166 |
12709 | 167 ** The following functions are new in 3.4.1: |
168 | |
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169 colstyle gmres iscolumn isrow mgorth nproc rectangle |
12709 | 170 |
171 ** The get_forge_pkg function is now private. | |
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172 |
12709 | 173 ** The rectangle_lw, rectangle_sw, triangle_lw, and triangle_sw |
174 functions are now private. | |
175 | |
176 ** The logistic_regression_derivatives and logistic_regression_likelihood | |
177 functions are now private. | |
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178 |
12739 | 179 ** ChangeLog files in the Octave sources are no longer maintained |
180 by hand. Instead, there is a single ChangeLog file generated from | |
181 the Mercurial version control commit messages. Older ChangeLog | |
182 information can be found in the etc/OLD-ChangeLogs directory in the | |
183 source distribution. | |
184 | |
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185 Summary of important user-visible changes for version 3.4: |
9352 | 186 --------------------------------------------------------- |
187 | |
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188 ** BLAS and LAPACK libraries are now required to build Octave. The |
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189 subset of the reference BLAS and LAPACK libraries has been removed |
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190 from the Octave sources. |
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191 |
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192 ** The ARPACK library is now distributed with Octave so it no longer |
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193 needs to be available as an external dependency when building |
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194 Octave. |
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195 |
10118 | 196 ** The `lookup' function was extended to be more useful for |
197 general-purpose binary searching. Using this improvement, the | |
198 ismember function was rewritten for significantly better | |
199 performance. | |
9352 | 200 |
201 ** Real, integer and logical matrices, when used in indexing, will now | |
202 cache the internal index_vector value (zero-based indices) when | |
203 successfully used as indices, eliminating the conversion penalty for | |
10118 | 204 subsequent indexing by the same matrix. In particular, this means it |
205 is no longer needed to avoid repeated indexing by logical arrays | |
206 using find for performance reasons. | |
9888 | 207 |
10118 | 208 ** Logical matrices are now treated more efficiently when used as |
209 indices. Octave will keep the index as a logical mask unless the | |
210 ratio of true elements is small enough, using a specialized | |
211 code. Previously, all logical matrices were always first converted | |
212 to index vectors. This results in savings in both memory and | |
213 computing time. | |
9480 | 214 |
10118 | 215 ** The `sub2ind' and `ind2sub' functions were reimplemented as compiled |
216 functions for better performance. These functions are now faster, | |
217 can deliver more economized results for ranges, and can reuse the | |
218 index cache mechanism described in previous paragraph. | |
219 | |
220 ** The built-in function equivalents to associative operators (`plus', | |
221 `times', `mtimes', `and', and `or') have been extended to accept | |
222 multiple arguments. This is especially useful for summing | |
223 (multiplying, etc.) lists of objects (of possibly distinct types): | |
9408 | 224 |
9449 | 225 matrix_sum = plus (matrix_list{:}); |
226 | |
10118 | 227 ** An FTP object type based on libcurl has been implemented. These |
228 objects allow ftp connections, downloads and uploads to be | |
229 managed. For example, | |
9880 | 230 |
10118 | 231 fp = ftp ("ftp.octave.org); |
232 cd (fp, "gnu/octave"); | |
233 mget (fp, "octave-3.2.3.tar.bz2"); | |
234 close (fp); | |
9880 | 235 |
10118 | 236 ** The default behavior of `assert (observed, expected)' has been |
237 relaxed to employ less strict checking that does not require the | |
238 internals of the values to match. This avoids previously valid | |
239 tests from breaking due to new internal classes introduced in future | |
240 Octave versions. | |
9449 | 241 |
242 For instance, all of these assertions were true in Octave 3.0.x | |
243 but false in 3.2.x due to new optimizations and improvements: | |
244 | |
245 assert (2*linspace (1, 5, 5), 2*(1:5)) | |
246 assert (zeros (0, 0), []) | |
247 assert (2*ones (1, 5), (2) (ones (1,5))) | |
9462 | 248 |
10118 | 249 ** The behavior of library functions `ismatrix', `issquare', and |
250 `issymmetric' has been changed for better consistency. | |
9873 | 251 |
10292 | 252 * The `ismatrix' function now returns true for all numeric, |
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253 logical and character 2-D or N-D matrices. Previously, `ismatrix' |
10292 | 254 returned false if the first or second dimension was zero. |
255 Hence, `ismatrix ([])' was false, | |
256 while `ismatrix (zeros (1,2,0))' was true. | |
9873 | 257 |
10118 | 258 * The `issquare' function now returns a logical scalar, and is |
259 equivalent to the expression | |
260 | |
261 ismatrix (x) && ndims (x) == 2 && rows (x) == columns (x) | |
262 | |
263 The dimension is no longer returned. As a result, `issquare ([])' | |
264 now yields true. | |
9873 | 265 |
10118 | 266 * The `issymmetric' function now checks for symmetry instead of |
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267 Hermitianness. For the latter, ishermitian was created. Also, |
10118 | 268 logical scalar is returned rather than the dimension, so |
269 `issymmetric ([])' is now true. | |
9873 | 270 |
10118 | 271 ** Function handles are now aware of overloaded functions. If a |
272 function is overloaded, the handle determines at the time of its | |
273 reference which function to call. A non-overloaded version does not | |
274 need to exist. | |
9873 | 275 |
10118 | 276 ** Overloading functions for built-in classes (double, int8, cell, |
277 etc.) is now compatible with Matlab. | |
9408 | 278 |
10323 | 279 ** Function handles can now be compared with the == and != operators, |
280 as well as the `isequal' function. | |
281 | |
10118 | 282 ** Performance of concatenation (using []) and the functions `cat', |
283 `horzcat', and `vertcat' has been improved for multidimensional | |
284 arrays. | |
10117 | 285 |
9547 | 286 ** The operation-assignment operators +=, -=, *= and /= now behave more |
10118 | 287 efficiently in certain cases. For instance, if M is a matrix and S a |
288 scalar, then the statement | |
9547 | 289 |
10118 | 290 M += S; |
9547 | 291 |
10118 | 292 will operate on M's data in-place if it is not shared by another |
293 variable, usually increasing both time and memory efficiency. | |
9547 | 294 |
9558 | 295 Only selected common combinations are affected, namely: |
9547 | 296 |
297 matrix += matrix | |
298 matrix -= matrix | |
9558 | 299 matrix .*= matrix |
300 matrix ./= matrix | |
301 | |
9547 | 302 matrix += scalar |
303 matrix -= scalar | |
304 matrix *= scalar | |
305 matrix /= scalar | |
9558 | 306 |
9552 | 307 logical matrix |= logical matrix |
308 logical matrix &= logical matrix | |
9547 | 309 |
10118 | 310 where matrix and scalar belong to the same class. The left-hand |
311 side must be a simple variable reference. | |
9888 | 312 |
10118 | 313 Moreover, when unary operators occur in expressions, Octave will |
314 also try to do the operation in-place if it's argument is a | |
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315 temporary expression. |
9589 | 316 |
10118 | 317 ** The effect of comparison operators (<, >, <=, and >=) applied to |
318 complex numbers has changed to be consistent with the strict | |
319 ordering defined by the `max', `min', and `sort' functions. More | |
320 specifically, complex numbers are compared by lexicographical | |
321 comparison of the pairs `[abs(z), arg(z)]'. Previously, only real | |
322 parts were compared; this can be trivially achieved by wrapping the | |
323 operands in real(). | |
9547 | 324 |
10118 | 325 ** The automatic simplification of complex computation results has |
326 changed. Octave will now simplify any complex number with a zero | |
327 imaginary part or any complex matrix with all elements having zero | |
328 imaginary part to a real value. Previously, this was done only for | |
329 positive zeros. Note that the behavior of the complex function is | |
330 unchanged and it still produces a complex value even if the | |
331 imaginary part is zero. | |
9826 | 332 |
10118 | 333 ** As a side effect of code refactoring in liboctave, the binary |
334 logical operations are now more easily amenable to compiler | |
335 optimizations and are thus significantly faster. | |
9595 | 336 |
10118 | 337 ** Octave now allows user-defined `subsasgn' methods to optimize out |
338 redundant copies. For more information, see the manual. | |
9595 | 339 |
10453 | 340 ** More efficient matrix division handling. Octave is now able to |
10118 | 341 handle the expressions |
9664 | 342 |
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343 M' \ V |
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344 M.' \ V |
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345 V / M |
9664 | 346 |
10118 | 347 (M is a matrix and V is a vector) more efficiently in certain cases. |
348 In particular, if M is triangular, all three expressions will be | |
349 handled by a single call to xTRTRS (from LAPACK), with appropriate | |
10453 | 350 flags. Previously, all three expressions required a physical |
10118 | 351 transpose of M. |
9664 | 352 |
10118 | 353 ** More efficient handling of certain mixed real-complex matrix |
354 operations. For instance, if RM is a real matrix and CM a complex | |
355 matrix, | |
9664 | 356 |
10118 | 357 RM * CM |
9664 | 358 |
359 can now be evaluated either as | |
360 | |
361 complex (RM * real (CM), RM * imag (CM)) | |
362 | |
363 or as | |
364 | |
365 complex (RM) * CM, | |
366 | |
10453 | 367 depending on the dimensions. The first form requires more |
368 temporaries and copying, but halves the FLOP count, which normally | |
369 brings better performance if RM has enough rows. Previously, the | |
370 second form was always used. | |
9664 | 371 |
11111 | 372 Matrix division is similarly affected. |
9664 | 373 |
10118 | 374 ** More efficient handling of triangular matrix factors returned from |
375 factorizations. The functions for computing QR, LU and Cholesky | |
376 factorizations will now automatically return the triangular matrix | |
377 factors with proper internal matrix_type set, so that it won't need | |
378 to be computed when the matrix is used for division. | |
9717 | 379 |
10118 | 380 ** The built-in `sum' function now handles the non-native summation |
381 (i.e., double precision sum of single or integer inputs) more | |
382 efficiently, avoiding a temporary conversion of the whole input | |
383 array to doubles. Further, `sum' can now accept an extra option | |
384 argument, using a compensated summation algorithm rather than a | |
385 straightforward sum, which significantly improves precision if lots | |
386 of cancellation occurs in the summation. | |
9717 | 387 |
10118 | 388 ** The built-in `bsxfun' function now uses optimized code for certain |
389 cases where built-in operator handles are passed in. Namely, the | |
390 optimizations concern the operators `plus', `minus', `times', | |
391 `ldivide', `rdivide', `power', `and', `or' (for logical arrays), | |
392 the relational operators `eq', `ne', `lt', `le', `gt', `ge', and the | |
393 functions `min' and `max'. Optimizations only apply when both | |
394 operands are of the same built-in class. Mixed real/complex and | |
395 single/double operations will first convert both operands to a | |
396 common type. | |
9745 | 397 |
10118 | 398 ** The `strfind' and `strrep' functions now have compiled |
399 implementations, facilitating significantly more efficient searching | |
400 and replacing in strings, especially with longer patterns. The code | |
401 of `strcat' has been vectorized and is now much more efficient when | |
402 many strings are concatenated. The `strcmpi' and `strncmpi' | |
403 functions are now built-in functions, providing better performance. | |
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404 |
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405 ** 'str2double' now has a compiled implementation and the API conforms |
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406 to Matlab. The additional Octave-specific features of returning a |
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407 boolean matrix indicating which elements were successfully converted |
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408 has been removed. |
10208 | 409 |
10453 | 410 ** Matlab-style ignoring input and output function arguments using |
11111 | 411 tilde (~) is now supported. Ignored output arguments may be |
412 detected from a function using the built-in function `isargout'. | |
413 For more details, consult the manual. | |
10886 | 414 |
10453 | 415 ** The list datatype, deprecated since the introduction of cells, has |
416 been removed. | |
10276 | 417 |
10453 | 418 ** The accumarray function has been optimized and is now significantly |
419 faster in certain important cases. | |
10054 | 420 |
10292 | 421 ** The behavior of isreal and isnumeric functions was changed to be more |
422 Matlab-compatible. | |
423 | |
10406 | 424 ** The integer math & conversion warnings (Octave:int-convert-nan, |
425 Octave:int-convert-non-int-val, Octave:int-convert-overflow, | |
11111 | 426 Octave:int-math-overflow) have been removed. |
10406 | 427 |
10453 | 428 ** rem and mod are now built-in functions. They also handle integer |
429 types efficiently using integer arithmetic. | |
10437 | 430 |
10536 | 431 ** Sparse indexing and indexed assignment has been mostly rewritten. |
432 Since Octave uses compressed column storage for sparse matrices, | |
433 major attention is devoted to operations manipulating whole columns. | |
434 Such operations are now significantly faster, as well as some other | |
435 important cases. | |
436 | |
437 Further, it is now possible to pre-allocate a sparse matrix and | |
438 subsequently fill it by assignments, provided they meet certain | |
439 conditions. For more information, consult the `spalloc' function, | |
440 which is no longer a mere dummy. Consequently, nzmax and nnz are no | |
11111 | 441 longer always equal in Octave. Octave may also produce a matrix |
442 with nnz < nzmax as a result of other operations, so you should | |
443 consistently use nnz unless you really want to use nzmax (i.e. the | |
444 space allocated for nonzero elements). | |
10536 | 445 |
446 Sparse concatenation is also affected, and concatenating sparse | |
447 matrices, especially larger collections, is now significantly more | |
11111 | 448 efficient. This applies to both the [] operator and the |
10536 | 449 cat/vertcat/horzcat functions. |
450 | |
11111 | 451 ** It is now possible to optionally employ the xGESDD LAPACK drivers |
452 for computing the singular value decomposition using svd(), instead | |
453 of the default xGESVD, using the configuration pseudo-variable | |
454 svd_driver. The xGESDD driver can be up to 6x times faster when | |
455 singular vectors are requested, but is reported to be somewhat less | |
10639 | 456 robust on highly ill-conditioned matrices. |
457 | |
458 ** Configuration pseudo-variables, such as page_screen_output or | |
459 confirm_recursive_rmdir (or the above mentioned svd_driver), now | |
460 accept a "local" option as second argument, requesting the change | |
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461 to be undone when the current function returns: |
10639 | 462 |
463 function [status, msg] = rm_rf (dir) | |
464 confirm_recursive_rmdir (false, "local"); | |
465 [status, msg] = rmdir (dir, "s"); | |
466 ... | |
467 endfunction | |
468 | |
469 Upon return, confirm_recursive_rmdir will be restored to the value | |
470 it had on entry to the function, even if there were subsequent | |
471 changes to the variable in function rm_rf or any of the functions | |
472 it calls. | |
473 | |
11111 | 474 ** pkg now accepts a -forge option for downloading and installing |
475 packages from Octave Forge automatically. For example, | |
10774 | 476 |
477 pkg install -forge general | |
478 | |
11111 | 479 will automatically download the latest release of the general |
480 package and attempt to install it. No automatic resolving of | |
481 dependencies is provided. Further, | |
10639 | 482 |
10774 | 483 pkg list -forge |
484 | |
485 can be used to list all available packages. | |
486 | |
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487 ** The internal data representation of structs has been completely |
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488 rewritten to make certain optimizations feasible. The field data |
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489 can now be shared between structs with equal keys but different |
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490 dimensions or values, making operations that preserve the fields |
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491 faster. Economized storage is now used for scalar structs (just |
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492 like most other scalars), making their usage more |
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493 memory-efficient. Certain array-like operations on structs |
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494 (concatenation, uniform cellfun, num2cell) have gained a |
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495 significant speed-up. Additionally, the octave_scalar_map class |
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496 now provides a simpler interface to work with scalar structs within |
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497 a C++ DLD function. |
10639 | 498 |
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499 ** Two new formats are available for displaying numbers: |
11111 | 500 |
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501 format short eng |
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502 format long eng |
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504 Both display numbers in engineering notation, i.e., mantissa + |
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505 exponent where the exponent is a multiple of 3. |
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506 |
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507 ** The following functions are new in Octave 3.4: |
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508 accumdim erfcx nfields pqpnonneg uigetdir |
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509 bitpack fileread nth_element quadcc uigetfile |
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510 bitunpack fminbnd onCleanup randi uiputfile |
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511 blkmm fskipl pbaspect repelems uimenu |
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512 cbrt ifelse pie3 reset whitebg |
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513 curl ishermitian powerset rsf2csf |
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514 chop isindex ppder saveas |
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515 daspect luupdate ppint strread |
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516 divergence merge ppjumps textread |
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517 |
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518 ** Using the image function to view images with external programs such |
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519 as display, xv, and xloadimage is no longer supported. The |
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520 image_viewer function has also been removed. |
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521 |
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522 ** The behavior of struct assignments to non-struct values has been |
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523 changed. Previously, it was possible to overwrite an arbitrary |
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524 value: |
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525 |
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526 a = 1; |
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527 a.x = 2; |
10873 | 528 |
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529 This is no longer possible unless a is an empty matrix or cell |
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530 array. |
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531 |
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532 ** The dlmread function has been extended to allow specifying a custom |
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533 value for empty fields. |
10829 | 534 |
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535 ** The dlmread and dlmwrite functions have been modified to accept |
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536 file IDs (as returned by fopen) in addition to file names. |
11111 | 537 |
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538 ** Octave can now optimize away the interpreter overhead of an |
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539 anonymous function handle, if the function simply calls another |
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540 function or handle with some of its parameters bound to certain |
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541 values. Example: |
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542 |
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543 f = @(x) sum (x, 1); |
10966 | 544 |
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545 When f is called, the call is forwarded to @sum with the constant 1 |
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546 appended, and the anonymous function call does not occur on the |
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547 call stack. |
10829 | 548 |
12424 | 549 ** For compatibility with Matlab, mu2lin (x) is now equivalent to |
550 mu2lin (x, 0). | |
551 | |
552 ** The new function `history_control' may be used to control the way | |
553 command lines are added to the history list when Octave is using | |
554 readline for command-line editing. For example | |
555 | |
556 history_control ("ignoredups") | |
557 | |
558 tells Octave to avoid adding duplicate lines to the history list. | |
559 | |
560 ** Octave now uses the gnulib library for improved portability and to | |
561 avoid bugs in operating system functions. | |
562 | |
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563 ** Deprecated functions. |
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564 |
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565 The following functions were deprecated in Octave 3.0 and have been |
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566 removed from Octave 3.4. |
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567 |
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568 beta_cdf geometric_pdf pascal_pdf |
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569 beta_inv geometric_rnd pascal_rnd |
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570 beta_pdf hypergeometric_cdf poisson_cdf |
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571 beta_rnd hypergeometric_inv poisson_inv |
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572 binomial_cdf hypergeometric_pdf poisson_pdf |
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573 binomial_inv hypergeometric_rnd poisson_rnd |
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574 binomial_pdf intersection polyinteg |
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575 binomial_rnd is_bool setstr |
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576 chisquare_cdf is_complex struct_contains |
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577 chisquare_inv is_list struct_elements |
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578 chisquare_pdf is_matrix t_cdf |
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579 chisquare_rnd is_scalar t_inv |
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580 clearplot is_square t_pdf |
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581 clg is_stream t_rnd |
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582 com2str is_struct uniform_cdf |
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583 exponential_cdf is_symmetric uniform_inv |
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584 exponential_inv is_vector uniform_pdf |
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585 exponential_pdf isstr uniform_rnd |
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586 exponential_rnd lognormal_cdf weibcdf |
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587 f_cdf lognormal_inv weibinv |
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588 f_inv lognormal_pdf weibpdf |
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589 f_pdf lognormal_rnd weibrnd |
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590 f_rnd meshdom weibull_cdf |
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591 gamma_cdf normal_cdf weibull_inv |
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592 gamma_inv normal_inv weibull_pdf |
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593 gamma_pdf normal_pdf weibull_rnd |
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594 gamma_rnd normal_rnd wiener_rnd |
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595 geometric_cdf pascal_cdf |
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596 geometric_inv pascal_inv |
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597 |
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598 The following functions were deprecated in Octave 3.2 and will |
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599 be removed from Octave 3.6 (or whatever version is the second major |
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600 release after 3.2): |
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601 |
11390
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602 create_set spcholinv splu |
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603 dmult spcumprod spmax |
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604 iscommand spcumsum spmin |
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605 israwcommand spdet spprod |
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606 lchol spdiag spqr |
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607 loadimage spfind spsum |
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608 mark_as_command sphcat spsumsq |
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609 mark_as_rawcommand spinv spvcat |
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610 spatan2 spkron str2mat |
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611 spchol splchol unmark_command |
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612 spchol2inv split unmark_rawcommand |
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613 |
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614 The following functions have been deprecated in Octave 3.4 and will |
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615 be removed from Octave 3.8 (or whatever version is the second major |
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616 release after 3.4): |
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617 |
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618 autocor cellidx gammai krylovb saveimage |
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619 autocov dispatch glpkmex perror strerror |
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620 betai fstat is_global replot values |
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621 |
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622 Summary of important user-visible changes for version 3.2: |
5913 | 623 --------------------------------------------------------- |
2452 | 624 |
8737 | 625 ** Compatibility with Matlab graphics has been improved. |
6329 | 626 |
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627 The hggroup object and associated listener callback functions have |
8737 | 628 been added allowing the inclusion of group objects. Data sources |
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629 have been added to these group objects such that |
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630 |
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631 x = 0:0.1:10; |
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632 y = sin (x); |
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633 plot (x, y, "ydatasource", "y"); |
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634 for i = 1 : 100 |
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635 pause(0.1) |
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636 y = sin (x + 0.1 * i); |
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637 refreshdata(); |
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638 endfor |
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639 |
8737 | 640 works as expected. This capability has be used to introduce |
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641 stem-series, bar-series, etc., objects for better Matlab |
8737 | 642 compatibility. |
643 | |
644 ** New graphics functions: | |
645 | |
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646 addlistener ezcontour gcbo refresh |
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647 addproperty ezcontourf ginput refreshdata |
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648 allchild ezmesh gtext specular |
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649 available_graphics_toolkits ezmeshc intwarning surfl |
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650 graphics_toolkit ezplot ishghandle trisurf |
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651 cla ezplot3 isocolors waitforbuttonpress |
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652 clabel ezpolar isonormals |
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653 comet ezsurf isosurface |
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654 dellistener findall linkprop |
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655 diffuse gcbf plotmatrix |
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656 |
8737 | 657 ** New experimental OpenGL/FLTK based plotting system. |
658 | |
659 An experimental plotting system based on OpenGL and the FLTK | |
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660 toolkit is now part of Octave. This graphics toolkit is disabled by |
8737 | 661 default. You can switch to using it with the command |
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662 |
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663 graphics_toolkit ("fltk") |
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664 |
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665 for all future figures or for a particular figure with the command |
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666 |
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667 graphics_toolkit (h, "fltk") |
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668 |
11139 | 669 where "h" is a valid figure handle. |
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670 |
8737 | 671 ** Functions providing direct access to gnuplot have been removed. |
672 | |
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673 The functions __gnuplot_plot__, __gnuplot_set__, __gnuplot_raw__, |
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674 __gnuplot_show__, __gnuplot_replot__, __gnuplot_splot__, |
8737 | 675 __gnuplot_save_data__ and __gnuplot_send_inline_data__ have been |
676 removed from Octave. These function were incompatible with the | |
677 high level graphics handle code. | |
6329 | 678 |
8885 | 679 ** The Control, Finance and Quaternion functions have been removed. |
680 | |
681 These functions are now available as separate packages from | |
682 | |
683 http://octave.sourceforge.net/packages.html | |
684 | |
685 and can be reinstalled using the Octave package manager (see | |
686 the pkg function). | |
687 | |
688 ** Specific sparse matrix functions removed. | |
689 | |
690 The following functions, which handled only sparse matrices have | |
691 been removed. Instead of calling these functions directly, you | |
692 should use the corresponding function without the "sp" prefix. | |
8737 | 693 |
8885 | 694 spatan2 spcumsum spkron spprod |
695 spchol spdet splchol spqr | |
696 spchol2inv spdiag splu spsum | |
697 spcholinv spfind spmax spsumsqk | |
698 spcumprod spinv spmin | |
699 | |
700 ** Improvements to the debugger. | |
701 | |
702 The interactive debugging features have been improved. Stopping | |
703 on statements with dbstop should work correctly now. Stepping | |
704 into and over functions, and stepping one statement at a time | |
705 (with dbstep) now works. Moving up and down the call stack with | |
706 dbup and dbdown now works. The dbstack function is now available | |
707 to print the current function call stack. The new dbquit function | |
708 is available to exit the debugging mode. | |
709 | |
710 ** Improved traceback error messages. | |
711 | |
712 Traceback error messages are much more concise and easier to | |
713 understand. They now display information about the function call | |
714 stack instead of the stack of all statements that were active at | |
715 the point of the error. | |
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716 |
8737 | 717 ** Object Oriented Programming. |
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718 |
8737 | 719 Octave now includes OOP features and the user can create their own |
720 class objects and overloaded functions and operators. For | |
721 example, all methods of a class called "myclass" will be found in | |
722 a directory "@myclass" on the users path. The class specific | |
723 versions of functions and operators take precedence over the | |
724 generic versions of these functions. | |
725 | |
726 New functions related to OOP include | |
7189 | 727 |
8737 | 728 class inferiorto isobject loadobj methods superiorto |
729 | |
730 See the Octave manual for more details. | |
7038 | 731 |
8747 | 732 ** Parsing of Command-style Functions. |
733 | |
734 Octave now parses command-style functions without needing to first | |
735 declare them with "mark_as_command". The rules for recognizing a | |
736 command-style function calls are | |
737 | |
738 * A command must appear as the first word in a statement, | |
739 followed by a space. | |
740 | |
741 * The first character after the space must not be '=' or '(' | |
742 | |
743 * The next token after the space must not look like a binary | |
744 operator. | |
745 | |
746 These rules should be mostly compatible with the way Matlab parses | |
747 command-style function calls and allow users to define commands in | |
748 .m files without having to mark them as commands. | |
749 | |
750 Note that previous versions of Octave allowed expressions like | |
751 | |
752 x = load -text foo.dat | |
753 | |
754 but an expression like this will now generate a parse error. In | |
755 order to assign the value returned by a function to a variable, | |
756 you must use the normal function call syntax: | |
757 | |
758 x = load ("-text", "foo.dat"); | |
759 | |
8737 | 760 ** Block comments. |
761 | |
8747 | 762 Commented code can be between matching "#{" and "#}" or "%{" and |
763 "%}" markers, even if the commented code spans several line. This | |
764 allows blocks code to be commented, without needing to comment | |
765 each line. For example, | |
5814 | 766 |
8747 | 767 function [s, t] = func (x, y) |
768 s = 2 * x; | |
769 #{ | |
770 s *= y; | |
771 t = y + x; | |
772 #} | |
7990
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773 endfunction |
5814 | 774 |
8747 | 775 the lines "s *= y;" and "t = y + x" will not be executed. |
8737 | 776 |
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777 ** If any subfunction in a file ends with "end" or "endfunction", then |
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778 they all must end that way. Previously, Octave accepted |
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779 |
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780 function main () |
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781 ... |
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782 # no endfunction here. |
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783 function sub () |
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784 ... |
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785 endfunction |
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786 |
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|
787 but this is no longer allowed. |
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|
788 |
8737 | 789 ** Special treatment in the parser of expressions like "a' * b". |
2452 | 790 |
8737 | 791 In these cases the transpose is no longer explicitly formed and |
792 BLAS libraries are called with the transpose flagged, | |
793 significantly improving performance for these kinds of | |
794 operations. | |
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795 |
8737 | 796 ** Single Precision data type. |
2452 | 797 |
8737 | 798 Octave now includes a single precision data type. Single |
799 precision variables can be created with the "single" command, or | |
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800 from functions like ones, eye, etc. For example, |
5995 | 801 |
8737 | 802 single (1) |
803 ones (2, 2, "single") | |
804 zeros (2, 2, "single") | |
805 eye (2, 2, "single") | |
806 Inf (2, 2, "single") | |
807 NaN (2, 2, "single") | |
808 NA (2, 2, "single") | |
7279 | 809 |
8737 | 810 all create single precision variables. For compatibility with |
811 Matlab, mixed double/single precision operators and functions | |
812 return single precision types. | |
813 | |
814 As a consequence of this addition to Octave the internal | |
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815 representation of the double precision NA value has changed, and |
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816 so users that make use of data generated by Octave with R or |
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|
817 visa-versa are warned that compatibility might not be assured. |
7279 | 818 |
8737 | 819 ** Improved array indexing. |
820 | |
821 The underlying code used for indexing of arrays has been | |
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|
822 completely rewritten and indexing is now significantly faster. |
8737 | 823 |
8755 | 824 ** Improved memory management. |
825 | |
826 Octave will now attempt to share data in some cases where previously | |
827 a copy would be made, such as certain array slicing operations or | |
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828 conversions between cells, structs and cs-lists. This usually reduces |
8755 | 829 both time and memory consumption. |
9128 | 830 Also, Octave will now attempt to detect and optimize usage of a vector |
831 as a stack, when elements are being repeatedly inserted at/removed from | |
832 the end of the vector. | |
8755 | 833 |
8738 | 834 ** Improved performance for reduction operations. |
835 | |
8755 | 836 The performance of the sum, prod, sumsq, cumsum, cumprod, any, all, |
837 max and min functions has been significantly improved. | |
8738 | 838 |
9006 | 839 ** Sorting and searching. |
840 | |
841 The performance of sort has been improved, especially when sorting | |
10453 | 842 indices are requested. An efficient built-in issorted |
843 implementation was added. The sortrows function now uses a more | |
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844 efficient algorithm, especially in the homogeneous case. The lookup |
10453 | 845 function is now a built-in function performing a binary search, |
846 optimized for long runs of close elements. Lookup also works with | |
847 cell arrays of strings. | |
9006 | 848 |
849 ** Range arithmetics | |
850 | |
10453 | 851 For some operations on ranges, Octave will attempt to keep the |
852 result as a range. These include negation, adding a scalar, | |
853 subtracting a scalar, and multiplying by a scalar. Ranges with zero | |
854 increment are allowed and can be constructed using the built-in | |
855 function `ones'. | |
9006 | 856 |
857 ** Various performance improvements. | |
858 | |
10453 | 859 Performance of a number of other built-in operations and functions |
860 was improved, including: | |
9006 | 861 |
862 * logical operations | |
863 * comparison operators | |
864 * element-wise power | |
865 * accumarray | |
866 * cellfun | |
867 * isnan | |
868 * isinf | |
869 * isfinite | |
870 * nchoosek | |
871 * repmat | |
872 * strcmp | |
873 | |
8737 | 874 ** 64-bit integer arithmetic. |
875 | |
876 Arithmetic with 64-bit integers (int64 and uint64 types) is fully | |
877 supported, with saturation semantics like the other integer types. | |
878 Performance of most integer arithmetic operations has been | |
879 improved by using integer arithmetic directly. Previously, Octave | |
880 performed integer math with saturation semantics by converting the | |
881 operands to double precision, performing the operation, and then | |
882 converting the result back to an integer value, truncating if | |
883 necessary. | |
884 | |
8885 | 885 ** Diagonal and permutation matrices. |
886 | |
887 The interpreter can now treat diagonal and permutation matrices as | |
888 special objects that store only the non-zero elements, rather than | |
889 general full matrices. Therefore, it is now possible to construct | |
890 and use these matrices in linear algebra without suffering a | |
891 performance penalty due to storing large numbers of zero elements. | |
892 | |
893 ** Improvements to fsolve. | |
894 | |
895 The fsolve function now accepts an option structure argument (see | |
896 also the optimset function). The INFO values returned from fsolve | |
897 have changed to be compatible with Matlab's fsolve function. | |
898 Additionally, fsolve is now able to solve overdetermined systems, | |
899 complex-differentiable complex systems, systems with a sparse | |
900 jacobian and can work in single precision if given single precision | |
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901 inputs. It can also be called recursively. |
8885 | 902 |
8737 | 903 ** Improvements to the norm function. |
904 | |
905 The norm function is now able to compute row or column norms of a | |
906 matrix in a single call, as well as general matrix p-norms. | |
907 | |
908 ** New functions for computing some eigenvalues or singular values. | |
909 | |
910 The eigs and svds functions have been included in Octave. These | |
911 functions require the ARPACK library (now distributed under a | |
912 GPL-compatible license). | |
913 | |
914 ** New QR and Cholesky factorization updating functions. | |
8370
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|
915 |
8737 | 916 choldelete cholshift qrdelete qrshift |
917 cholinsert cholupdate qrinsert qrupdate | |
918 | |
919 ** New quadrature functions. | |
920 | |
921 dblquad quadgk quadv triplequad | |
922 | |
8885 | 923 ** New functions for reading and writing images. |
924 | |
925 The imwrite and imread functions have been included in Octave. | |
926 These functions require the GraphicsMagick library. The new | |
927 function imfinfo provides information about an image file (size, | |
928 type, colors, etc.) | |
929 | |
9215
1500d0197484
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|
930 ** The input_event_hook function has been replaced by the pair of |
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|
931 functions add_input_event_hook and remove_input_event_hook so that |
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932 more than one hook function may be installed at a time. |
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933 |
8737 | 934 ** Other miscellaneous new functions. |
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935 |
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diff
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936 addtodate hypot reallog |
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diff
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|
937 bicgstab idivide realpow |
9006 | 938 cellslices info realsqrt |
939 cgs interp1q rectint | |
940 command_line_path isdebugmode regexptranslate | |
941 contrast isfloat restoredefaultpath | |
942 convn isstrprop roundb | |
943 cummin log1p rundemos | |
944 cummax lsqnonneg runlength | |
945 datetick matlabroot saveobj | |
946 display namelengthmax spaugment | |
947 expm1 nargoutchk strchr | |
948 filemarker pathdef strvcat | |
949 fstat perl subspace | |
950 full prctile symvar | |
951 fzero quantile treelayout | |
952 genvarname re_read_readline_init_file validatestring | |
953 histc | |
8370
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954 |
8885 | 955 ** Changes to strcat. |
956 | |
957 The strcat function is now compatible with Matlab's strcat | |
958 function, which removes trailing whitespace when concatenating | |
959 character strings. For example | |
960 | |
961 strcat ('foo ', 'bar') | |
962 ==> 'foobar' | |
963 | |
964 The new function cstrcat provides the previous behavior of | |
965 Octave's strcat. | |
966 | |
967 ** Improvements to the help functions. | |
968 | |
9034
52515efc50c0
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9031
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969 The help system has been mostly re-implemented in .m files to make |
8885 | 970 it easier to modify. Performance of the lookfor function has been |
971 greatly improved by caching the help text from all functions that | |
972 are distributed with Octave. The pkg function has been modified | |
973 to generate cache files for external packages when they are | |
974 installed. | |
975 | |
8888
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976 ** Deprecated functions. |
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977 |
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978 The following functions were deprecated in Octave 3.0 and will be |
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979 removed from Octave 3.4 (or whatever version is the second major |
8888
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980 release after 3.0): |
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981 |
11112
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982 beta_cdf geometric_pdf pascal_pdf |
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983 beta_inv geometric_rnd pascal_rnd |
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984 beta_pdf hypergeometric_cdf poisson_cdf |
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985 beta_rnd hypergeometric_inv poisson_inv |
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986 binomial_cdf hypergeometric_pdf poisson_pdf |
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987 binomial_inv hypergeometric_rnd poisson_rnd |
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|
988 binomial_pdf intersection polyinteg |
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989 binomial_rnd is_bool setstr |
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990 chisquare_cdf is_complex struct_contains |
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991 chisquare_inv is_list struct_elements |
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992 chisquare_pdf is_matrix t_cdf |
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993 chisquare_rnd is_scalar t_inv |
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994 clearplot is_square t_pdf |
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995 clg is_stream t_rnd |
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996 com2str is_struct uniform_cdf |
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997 exponential_cdf is_symmetric uniform_inv |
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998 exponential_inv is_vector uniform_pdf |
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999 exponential_pdf isstr uniform_rnd |
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1000 exponential_rnd lognormal_cdf weibcdf |
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1001 f_cdf lognormal_inv weibinv |
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1002 f_inv lognormal_pdf weibpdf |
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1003 f_pdf lognormal_rnd weibrnd |
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1004 f_rnd meshdom weibull_cdf |
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1005 gamma_cdf normal_cdf weibull_inv |
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1006 gamma_inv normal_inv weibull_pdf |
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1007 gamma_pdf normal_pdf weibull_rnd |
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1008 gamma_rnd normal_rnd wiener_rnd |
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1009 geometric_cdf pascal_cdf |
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1010 geometric_inv pascal_inv |
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1011 |
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|
1012 The following functions are now deprecated in Octave 3.2 and will |
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1013 be removed from Octave 3.6 (or whatever version is the second major |
8888
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|
1014 release after 3.2): |
0c7b0049c023
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1015 |
0c7b0049c023
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|
1016 create_set spcholinv spmax |
0c7b0049c023
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|
1017 dmult spcumprod spmin |
0c7b0049c023
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|
1018 iscommand spcumsum spprod |
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|
1019 israwcommand spdet spqr |
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parents:
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1020 lchol spdiag spsum |
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1021 loadimage spfind spsumsq |
0c7b0049c023
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|
1022 mark_as_command spinv str2mat |
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1023 mark_as_rawcommand spkron unmark_command |
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|
1024 spatan2 splchol unmark_rawcommand |
0c7b0049c023
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|
1025 spchol split |
0c7b0049c023
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changeset
|
1026 spchol2inv splu |
0c7b0049c023
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parents:
8885
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changeset
|
1027 |
7990
86dae6e5b83c
Initial update of NEWS for 3.2 release
David Bateman <dbateman@free.fr>
parents:
7279
diff
changeset
|
1028 See NEWS.3 for old news. |