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Reorganize homepage.
author Kai T. Ohlhus <k.ohlhus@gmail.com>
date Thu, 10 Sep 2020 17:47:36 +0900
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1 ---
2 layout: page
3 title: GNU Octave Version 3.6
4 menu: false
5 permalink: NEWS-3.6.html
6 ---
7
8 ## Summary of important user-visible changes
9
10 January 15, 2012
11
12 {% include release_news_select.md %}
13
14 <pre>
15 ** The PCRE library is now required to build Octave. If a pre-compiled
16 package does not exist for your system, you can find PCRE sources
17 at http://www.pcre.org
18
19 ** The ARPACK library is no longer distributed with Octave.
20 If you need the eigs or svds functions you must provide an
21 external ARPACK through a package manager or by compiling it
22 yourself. If a pre-compiled package does not exist for your system,
23 you can find the current ARPACK sources at
24 http://forge.scilab.org/index.php/p/arpack-ng
25
26 ** Many of Octave's binary operators (.*, .^, +, -, ...) now perform
27 automatic broadcasting for array operations which allows you to use
28 operator notation instead of calling bsxfun or expanding arrays (and
29 unnecessarily wasting memory) with repmat or similar idioms. For
30 example, to scale the columns of a matrix by the elements of a row
31 vector, you may now write
32
33 rv .* M
34
35 In this expression, the number of elements of rv must match the
36 number of columns of M. The following operators are affected:
37
38 plus + .+
39 minus - .-
40 times .*
41 rdivide ./
42 ldivide .\
43 power .^ .**
44 lt <
45 le <=
46 eq ==
47 gt >
48 ge >=
49 ne != ~=
50 and &
51 or |
52 atan2
53 hypot
54 max
55 min
56 mod
57 rem
58 xor
59
60 additionally, since the A op= B assignment operators are equivalent
61 to A = A op B, the following operators are also affected:
62
63 += -= .+= .-= .*= ./= .\= .^= .**= &= |=
64
65 See the "Broadcasting" section in the new "Vectorization and Faster
66 Code Execution" chapter of the manual for more details.
67
68 ** Octave now features a profiler, thanks to the work of Daniel Kraft
69 under the Google Summer of Code mentorship program. The manual has
70 been updated to reflect this addition. The new user-visible
71 functions are profile, profshow, and profexplore.
72
73 ** Overhaul of statistical distribution functions
74
75 Functions now return "single" outputs for inputs of class "single".
76
77 75% reduction in memory usage through use of logical indexing.
78
79 Random sample functions now use the same syntax as rand and accept
80 a comma separated list of dimensions or a dimension vector.
81
82 Functions have been made Matlab-compatible with regard to special
83 cases (probability on boundaries, probabilities for values outside
84 distribution, etc.). This may cause subtle changes to existing
85 scripts.
86
87 negative binomial function has been extended to real, non-integer
88 inputs. The discrete_inv function now returns v(1) for 0 instead of
89 NaN. The nbincdf function has been recoded to use a closed form
90 solution with betainc.
91
92 ** strread, textscan, and textread have been completely revamped.
93
94 They now support nearly all Matlab functionality including:
95
96 * Matlab-compatible whitespace and delimiter defaults
97
98 * Matlab-compatible options: 'whitespace', treatasempty', format
99 string repeat count, user-specified comment style, uneven-length
100 output arrays, %n and %u conversion specifiers (provisionally)
101
102 ** All .m string functions have been modified for better performance or
103 greater Matlab compatibility. Performance gains of 15X-30X have
104 been demonstrated. Operations on cell array of strings no longer pay
105 quite as high a penalty as those on 2-D character arrays.
106
107 deblank: Now requires character or cellstr input.
108
109 strtrim: Now requires character or cellstr input.
110 No longer trims nulls ("\0") from string for Matlab
111 compatibility.
112
113 strmatch: Follows documentation precisely and ignores trailing spaces
114 in pattern and in string. Note that this is documented
115 Matlab behavior but the implementation apparently does
116 not always follow it.
117
118 substr: Now possible to specify a negative LEN option which
119 extracts to within LEN of the end of the string.
120
121 strtok: Now accepts cellstr input.
122
123 base2dec, bin2dec, hex2dec:
124 Now accept cellstr inputs.
125
126 dec2base, dec2bin, dec2hex:
127 Now accept cellstr inputs.
128
129 index, rindex:
130 Now accept 2-D character array input.
131
132 strsplit: Now accepts 2-D character array input.
133
134 ** Geometry functions derived from Qhull (convhull, delaunay, voronoi)
135 have been revamped. The options passed to the underlying qhull
136 command have been changed for better results or for Matlab
137 compatibility.
138
139 convhull: Default options are "Qt" for 2D, 3D, 4D inputs
140 Default options are "Qt Qx" for 5D and higher
141
142 delaunay: Default options are "Qt Qbb Qc Qz" for 2D and 3D inputs
143 Default options are "Qt Qbb Qc Qx" for 4D and higher
144
145 voronoi: No default arguments
146
147 ** Date/Time functions updated. Millisecond support with FFF format
148 string now supported.
149
150 datestr: Numerical formats 21, 22, 29 changed to match Matlab.
151 Now accepts cellstr input.
152
153 ** The following warning IDs have been removed:
154
155 Octave:associativity-change
156 Octave:complex-cmp-ops
157 Octave:empty-list-elements
158 Octave:fortran-indexing
159 Octave:precedence-change
160
161 ** The warning ID Octave:string-concat has been renamed to
162 Octave:mixed-string-concat.
163
164 ** Octave now includes the following Matlab-compatible preference
165 functions:
166
167 addpref getpref ispref rmpref setpref
168
169 ** The following Matlab-compatible handle graphics functions have been
170 added:
171
172 guidata uipanel uitoolbar
173 guihandles uipushtool uiwait
174 uicontextmenu uiresume waitfor
175 uicontrol uitoggletool
176
177 The uiXXX functions above are experimental.
178
179 Except for uiwait and uiresume, the uiXXX functions are not
180 supported with the FLTK+OpenGL graphics toolkit.
181
182 The gnuplot graphics toolkit does not support any of the uiXXX
183 functions nor the waitfor function.
184
185 ** New keyword parfor (parallel for loop) is now recognized as a valid
186 keyword. Implementation, however, is still mapped to an ordinary
187 for loop.
188
189 ** Other new functions added in 3.6.0:
190
191 bicg nthargout usejava
192 is_dq_string narginchk waitbar
193 is_sq_string python zscore
194 is_function_handle register_graphics_toolkit
195 loaded_graphics_toolkits recycle
196
197 ** Deprecated functions.
198
199 The following functions were deprecated in Octave 3.2 and have been
200 removed from Octave 3.6.
201
202 create_set spcholinv splu
203 dmult spcumprod spmax
204 iscommand spcumsum spmin
205 israwcommand spdet spprod
206 lchol spdiag spqr
207 loadimage spfind spsum
208 mark_as_command sphcat spsumsq
209 mark_as_rawcommand spinv spvcat
210 spatan2 spkron str2mat
211 spchol splchol unmark_command
212 spchol2inv split unmark_rawcommand
213
214 The following functions have been deprecated in Octave 3.6 and will
215 be removed from Octave 3.10 (or whatever version is the second major
216 release after 3.6):
217
218 cut is_duplicate_entry
219 cor polyderiv
220 corrcoef shell_cmd
221 __error_text__ studentize
222 error_text sylvester_matrix
223 </pre>