Mercurial > web-octave
annotate pages/NEWS-4.2.md @ 271:3ce19581b946
LICENSE: Add "GPL-3.0-or-later" for code
| author | Kai Torben Ohlhus <k.ohlhus@gmail.com> |
|---|---|
| date | Mon, 21 Feb 2022 17:32:38 +0900 |
| parents | e69093ab4992 |
| children |
| rev | line source |
|---|---|
| 215 | 1 --- |
| 2 layout: page | |
| 3 title: GNU Octave Version 4.2 | |
| 4 permalink: NEWS-4.2.html | |
| 5 --- | |
| 6 | |
| 7 ## Summary of important user-visible changes | |
| 8 | |
| 9 November 13, 2016 | |
| 10 | |
| 11 {% include release_news_select.md %} | |
| 12 | |
|
224
e69093ab4992
Improve Release Notes display.
Kai T. Ohlhus <k.ohlhus@gmail.com>
parents:
216
diff
changeset
|
13 {::options parse_block_html="true" /} |
|
e69093ab4992
Improve Release Notes display.
Kai T. Ohlhus <k.ohlhus@gmail.com>
parents:
216
diff
changeset
|
14 <div class="panel callout"> |
|
e69093ab4992
Improve Release Notes display.
Kai T. Ohlhus <k.ohlhus@gmail.com>
parents:
216
diff
changeset
|
15 * TOC |
|
e69093ab4992
Improve Release Notes display.
Kai T. Ohlhus <k.ohlhus@gmail.com>
parents:
216
diff
changeset
|
16 {:toc} |
|
e69093ab4992
Improve Release Notes display.
Kai T. Ohlhus <k.ohlhus@gmail.com>
parents:
216
diff
changeset
|
17 </div> |
|
e69093ab4992
Improve Release Notes display.
Kai T. Ohlhus <k.ohlhus@gmail.com>
parents:
216
diff
changeset
|
18 {::options parse_block_html="false" /} |
|
e69093ab4992
Improve Release Notes display.
Kai T. Ohlhus <k.ohlhus@gmail.com>
parents:
216
diff
changeset
|
19 |
|
e69093ab4992
Improve Release Notes display.
Kai T. Ohlhus <k.ohlhus@gmail.com>
parents:
216
diff
changeset
|
20 |
| 215 | 21 <pre> |
| 22 ** The parser has been extended to accept, but ignore, underscore | |
| 23 characters in numbers. This facilitates writing more legible code | |
| 24 by using '_' as a thousands separator or to group nibbles into bytes | |
| 25 in hex constants. | |
| 26 | |
| 27 Examples: 1_000_000 == 1e6 or 0xDE_AD_BE_EF | |
| 28 | |
| 29 ** The parser has been extended to understand binary numbers which | |
| 30 begin with the prefix '0b' or '0B'. The value returned is Octave's | |
| 31 default numeric class of double, not at unsigned integer class. | |
| 32 Therefore numbers greater than flintmax, i.e., 2^53, will lose some | |
| 33 precision. | |
| 34 | |
| 35 Examples: 0b101 == 5 or 0B1100_0001 == 0xC1 | |
| 36 | |
| 37 ** gnuplot 4.4 is now the minimum version supported by Octave. | |
| 38 | |
| 39 ** The default set of colors used to plot lines has been updated to be | |
| 40 compatible with Matlab's new default color scheme. The line plot | |
| 41 color scheme can be set with the axes property "ColorOrder". | |
| 42 | |
| 43 ** The default colormap is now set to "viridis" which is also the | |
| 44 default colormap in matplotlib. This new colormap fixes some of the | |
| 45 main issues with the old default colormap "jet" such as its bad | |
| 46 "luminance profile" and is also more similar to Matlab's new default | |
| 47 colormap "parula". | |
| 48 | |
| 49 ** The colormap function no longer supports the input argument "list" | |
| 50 to show built-in colormaps. Use "help colormap" to find the | |
| 51 built-in colormaps. | |
| 52 | |
| 53 ** The graphics command "hold on" now ensures that each new plot added | |
| 54 to an existing plot has a different color or linestyle according to | |
| 55 the "ColorOrder" and/or "LineStyleOrder" properties. This is | |
| 56 equivalent to the old command "hold all" and was made for Matlab | |
| 57 compatibility. Existing code *may* produce differently colored | |
| 58 plots if it did not specify the color for a plot and relied on each | |
| 59 new plot having the default first color in the "ColorOrder" | |
| 60 property. | |
| 61 | |
| 62 ** When starting, Octave now looks in the function path for a file | |
| 63 startup.m and executes any commands found there. This change was | |
| 64 made to accommodate Matlab users. Octave has it's own configuration | |
| 65 system based on the file .octaverc which is preferred. | |
| 66 | |
| 67 ** Octal ('\NNN') and hex ('\xNN') escape sequences in single quoted | |
| 68 strings are now interpreted by the function do_string_escapes(). | |
| 69 The *printf family of functions now supports octal and hex escape | |
| 70 sequences in single-quoted strings for Matlab compatibility. | |
| 71 | |
| 72 ** Special octal and hex escape sequences for the pattern and | |
| 73 replacement strings in regular expressions are now interpreted for | |
| 74 Matlab compatibility. | |
| 75 | |
| 76 octal: '\oNNN' or '\o{NNN}' | |
| 77 hex : '\xNN' or '\x{NN}' | |
| 78 | |
| 79 ** Unknown escape sequences in the replacement string for regexprep are | |
| 80 now substituted with their unescaped version and no warning is | |
| 81 emitted. This change was made for Matlab compatibility. | |
| 82 | |
| 83 Example: regexprep ('a', 'a', 'x\yz') | |
| 84 => 'xyz' | |
| 85 | |
| 86 ** mkfifo now interprets the MODE argument as an octal, not decimal, | |
| 87 integer. This is consistent with the equivalent shell command. | |
| 88 | |
| 89 ** linspace now returns an empty matrix if the number of requested | |
| 90 points is 0 or a negative number. This change was made to be | |
| 91 compatible with Matlab releases newer than 2011. In addition, | |
| 92 Octave no longer supports matrix inputs for A or B. | |
| 93 | |
| 94 ** The cov function now returns the complex conjugate of the result | |
| 95 from previous versions of Octave. This change was made for | |
| 96 compatibility with Matlab. | |
| 97 | |
| 98 ** condest now works with a normest1 compatible syntax. | |
| 99 | |
| 100 ** The griddata function no longer plots the interpolated mesh if no | |
| 101 output argument is requested, instead the vector or array of | |
| 102 interpolated values is always returned for Matlab compatibility. | |
| 103 | |
| 104 ** The new function "light" and the corresponding graphics object | |
| 105 provide light and shadow effects for patch and surface objects. | |
| 106 | |
| 107 ** The surfnorm function now returns unnormalized (magnitude != 1) | |
| 108 normal vectors for compatibility with Matlab. | |
| 109 | |
| 110 ** The normal vectors returned from isonormals have been reversed to | |
| 111 point towards smaller values for compatibility with Matlab. | |
| 112 | |
| 113 ** The quadl function now uses an absolute, rather than relative, | |
| 114 tolerance for Matlab compatibility. The default tolerance is 1e-6 | |
| 115 which may result in lower precision results than previous versions | |
| 116 of Octave which used eps as the relative tolerance. The quadl | |
| 117 function has also been extended to return a second output with the | |
| 118 total number of function evaluations. | |
| 119 | |
| 120 ** The textscan function is now built-in and is much faster and much | |
| 121 more Matlab-compatible than the previous m-file version. | |
| 122 | |
| 123 ** Dialog boxes--errordlg, helpdlg, inputdlg, listdlg, msgbox, | |
| 124 questdlg, and warndlg--now exclusively use Qt for rendering. | |
| 125 Java based versions have been removed. | |
| 126 | |
| 127 ** The axes properties "TitleFontSizeMultiplier" and "TitleFontWeight" | |
| 128 are now implemented which control the default appearance of text | |
| 129 created with title(). | |
| 130 The axes property "LabelFontSizeMultiplier" is now implemented | |
| 131 which controls the default appearance of text created with | |
| 132 xlabel(), ylabel(), or zlabel(). | |
| 133 | |
| 134 ** The graphics property "box" for axes now defaults to "off". | |
| 135 To obtain equivalent plots to previous versions of Octave use | |
| 136 set (0, "DefaultAxesBox", "on"); | |
| 137 in your .octaverc file. | |
| 138 | |
| 139 ** The graphics property "boxstyle" has been implemented. The default | |
| 140 is "back" which draws only the back planes in a 3-D view. If the | |
| 141 option is "full" then all planes are drawn. | |
| 142 | |
| 143 ** The graphics property "erasemode" has been hidden, and will | |
| 144 eventually be removed. This property has also been removed | |
| 145 from Matlab, and was never implemented in Octave. | |
| 146 | |
| 147 ** The graphics property "graphicssmoothing" for figures now controls | |
| 148 whether anti-aliasing will be used for lines. The default is "on". | |
| 149 | |
| 150 ** The value "zero" for the axes properties "xaxislocation" and | |
| 151 "yaxislocation" has been deprecated and will be removed from | |
| 152 Octave 4.6. Use "origin" instead. | |
| 153 | |
| 154 ** The publish function allows easy publication of Octave script files | |
| 155 in HTML or other formats, including figures and output created by | |
| 156 this script. It comes with its counterpart grabcode, which lets one | |
| 157 literally grab the HTML published code from a remote website, for | |
| 158 example. | |
| 159 | |
| 160 ** The value of the MEX variable TrapFlag now defaults to 0, which will | |
| 161 cause Octave to abort execution of a MEX file and return to the | |
| 162 prompt if an error is encountered in mexCallMATLAB. | |
| 163 | |
| 164 ** The MEX API now includes the function mexCallMATLABWithTrap. This | |
| 165 function will not abort if an error occurs during mexCallMATLAB, but | |
| 166 instead will return execution to the MEX function for error | |
| 167 handling. | |
| 168 | |
| 169 ** The MEX API functions for input validation that begin with "mxIs" | |
| 170 (e.g., mxIsDouble, mxIsEmpty, etc.) now return type bool rather than | |
| 171 type int. | |
| 172 | |
| 173 ** The functions mxAssert and mxAssertS for checking assertions have | |
| 174 been added. In order to avoid a performance penalty they are only | |
| 175 compiled in to debug versions of a MEX file, i.e., that are produced | |
| 176 when the '-g' option is given to mex or mkoctfile. | |
| 177 | |
| 178 ** Other new MEX API functions include mexEvalStringWithTrap, | |
| 179 mxIsScalar, mxCreateUninitNumericArray, mxCreateUninitNumericMatrix. | |
| 180 | |
| 181 ** Other new functions added in 4.2: | |
| 182 | |
| 183 audioformats | |
| 184 camlight | |
| 185 condeig | |
| 186 deg2rad | |
| 187 dialog | |
| 188 evalc | |
| 189 hash | |
| 190 im2double | |
| 191 isocaps | |
| 192 lighting | |
| 193 localfunctions | |
| 194 material | |
| 195 normest1 | |
| 196 ode23 | |
| 197 ode45 | |
| 198 odeget | |
| 199 odeplot | |
| 200 odeset | |
| 201 padecoef | |
| 202 profexport | |
| 203 psi | |
| 204 rad2deg | |
| 205 reducepatch | |
| 206 reducevolume | |
| 207 smooth3 | |
| 208 uibuttongroup | |
| 209 | |
| 210 ** Deprecated functions. | |
| 211 | |
| 212 The following functions have been deprecated in Octave 4.2 and will | |
| 213 be removed from Octave 4.6 (or whatever version is the second major | |
| 214 release after 4.2): | |
| 215 | |
| 216 Function | Replacement | |
| 217 ---------------------|------------------ | |
| 218 bitmax | flintmax | |
| 219 mahalanobis | mahal in Octave-Forge statistics pkg | |
| 220 md5sum | hash | |
| 221 octve_config_info | __octave_config_info__ | |
| 222 onenormest | normest1 | |
| 223 sleep | pause | |
| 224 usleep | pause | |
| 225 wavread | audioread | |
| 226 wavwrite | audiowrite | |
| 227 | |
| 228 ** The following functions were deprecated in Octave 3.8 and have been | |
| 229 removed from Octave 4.2. | |
| 230 | |
| 231 default_save_options java_new | |
| 232 gen_doc_cache java_unsigned_conversion | |
| 233 interp1q javafields | |
| 234 isequalwithequalnans javamethods | |
| 235 java_convert_matrix re_read_readline_init_file | |
| 236 java_debug read_readline_init_file | |
| 237 java_invoke saving_history | |
| 238 | |
| 239 ** The global error_state variable in Octave's C++ API has been | |
| 240 deprecated and will be removed in a future version. Now the error | |
| 241 and print_usage functions throw an exception | |
| 242 (octave::execution_exception) after displaying the error message. | |
| 243 This makes the error and print_usage functions in C++ work more like | |
| 244 the corresponding functions in the scripting language. | |
| 245 | |
| 246 ** The default error handlers in liboctave have been updated to use | |
| 247 exceptions. After displaying an error message they no longer return | |
| 248 control to the calling program. The error handler function can be | |
| 249 customized through the global variables | |
| 250 "current_liboctave_error_handler" and | |
| 251 "current_liboctave_error_with_id_handler". If a programmer has | |
| 252 installed their own custom error handling routines when directly | |
| 253 linking with liboctave then these must be updated to throw an | |
| 254 exception and not return to the calling program. | |
| 255 | |
| 256 ** The system for common errors and warnings has been renamed from | |
| 257 gripe_XXX to either err_XXX if error is called or warn_XXX if | |
| 258 warning is called. The gripe_XXX functions are deprecated and will | |
| 259 be removed in version 4.6. | |
| 260 | |
| 261 ** New configure option, --enable-address-sanitizer-flags, to build | |
| 262 Octave with memory allocator checks (similar to those in valgrind) | |
| 263 built in. | |
| 264 </pre> |