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* governance.md: improve text
author Kai T. Ohlhus <k.ohlhus@gmail.com>
date Tue, 31 May 2022 01:45:26 +0900
parents fe59d0118a2b
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 ---
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2 layout: page
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3 title: GNU Octave Version 6
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4 permalink: NEWS-6.1.html
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5 ---
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6
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7 ## Summary of important user-visible changes
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8
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9 November 26, 2020
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10
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11 {% include release_news_select.md %}
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12
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13 {::options parse_block_html="true" /}
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14 <div class="panel callout">
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15 * TOC
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16 {:toc}
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17 </div>
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18 {::options parse_block_html="false" /}
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19
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20
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21 ### General improvements
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22
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23 - The `intersect`, `setdiff`, `setxor`, `union`, and `unique` functions
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24 accept a new sorting option `"stable"` which will return output values
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25 in the same order as the input, rather than in ascending order.
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26
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27 - Complex RESTful web services can now be accessed by the `webread` and
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28 `webwrite` functions alongside with the `weboptions` structure. One
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29 major feature is the support for cookies to enable RESTful
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30 communication with the web service.
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31
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32 Additionally, the system web browser can be opened by the `web`
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33 function.
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34
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35 - The `linspace` function now produces symmetrical sequences when the
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36 endpoints are symmetric. This is more intuitive and also compatible
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37 with recent changes made in Matlab R2019b.
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38
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39 - The underlying algorithm of the `rand` function has been changed.
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40 For single precision outputs, the algorithm has been fixed so that it
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41 produces values strictly in the range (0, 1). Previously, it could
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42 occasionally generate the right endpoint value of 1 (See
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43 [bug #41742](https://savannah.gnu.org/bugs/?41742)). In addition,
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44 the new implementation uses a uniform interval between floating
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45 point values in the range (0, 1) rather than targeting a uniform
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46 density (# of random integers / length along real number line).
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47
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48 - Numerical integration has been improved. The `quadv` function has
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49 been re-written so that it can compute integrands of periodic
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50 functions. At the same time, performance is better with ~3.5X fewer
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51 function evaluations required. A bug in `quadgk` that caused complex
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52 path integrals specified with `"Waypoints"` to occasionally be
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53 calculated in the opposite direction was fixed.
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54
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55 - The `edit` function option `"editinplace"` now defaults to `true` and
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56 the option `"home"` now defaults to the empty matrix `[]`. Files will
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57 no longer be copied to the user's HOME directory for editing. The old
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58 behavior can be restored by setting `"editinplace"` to `false` and
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59 `"home"` to `"~/octave"`.
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60
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61 - The `format` command supports two new options: `uppercase` and
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62 `lowercase` (default). With the default, print a lowercase 'e' for
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63 the exponent character in scientific notation and lowercase 'a-f' for
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64 the hex digits representing 10-15. With `uppercase`, print 'E' and
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65 'A-F' instead. The previous uppercase formats, `E` and `G`, no longer
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66 control the case of the output.
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67
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68 Additionally, the `format` command can be called with multiple options
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69 for controlling the format, spacing, and case in arbitrary order.
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70 For example:
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71
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72 format long e uppercase loose
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73
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74 Note, in the case of multiple competing format options the rightmost
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75 one is used, and, in case of an error, the previous format remains
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76 unchanged.
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77
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78 - L-value references (e.g., increment (++), decrement (--), and all
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79 in-place assignment operators (+=, -=, *=, /=, etc.)) are no longer
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80 allowed in anonymous functions.
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81
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82 - New warnings have been added about questionable uses of the colon ':'
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83 range operator. Each has a new warning ID so that it can be disabled
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84 if desired.
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85
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86 - `Octave:colon-complex-argument` : when any arg is complex
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87 - `Octave:colon-nonscalar-argument` : when any arg is non-scalar
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88
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89 &nbsp;
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90
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91 - The `regexp` and related functions now correctly handle and *require*
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92 strings in UTF-8 encoding. As with any other function that requires
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93 strings to be encoded in Octave's native encoding, you can use
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94 `native2unicode` to convert from your preferred locale. For example,
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95 the copyright symbol in UTF-8 is `native2unicode (169, "latin1")`.
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96
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97 - The startup file `octaverc` can now be located in the platform
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98 dependent location for user local configuration files (e.g.,
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99 `${XDG_CONFIG_HOME}/octave/octaverc` on Unix-like operating systems or
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100 `%APPDATA%\octave\octaverc` on Windows).
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101
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102 - The command
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103
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104 dbstop in CLASS at METHOD
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105
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106 now works to set breakpoints in classdef constructors and methods.
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107
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108 #### Graphics backend
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109
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110 - The use of Qt4 for graphics and the GUI is deprecated in Octave
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111 version 6 and no further bug fixes will be made. Qt4 support will be
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112 removed completely in Octave version 7.
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113
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114 - The `legend` function has been entirely rewritten. This fixes a
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115 number of historical bugs, and also implements new properties such as
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116 `"AutoUpdate"` and `"NumColumns"`. The gnuplot toolkit---which is no
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117 longer actively maintained---still uses the old legend function.
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118
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119 - The `axis` function was updated which resolved 10 bugs affecting
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120 axes to which `"equal"` had been applied.
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121
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122 - Graphic primitives now accept a color property value of `"none"`
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123 which is useful when a particular primitive needs to be hidden
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124 (for example, the Y-axis of an axes object with `"ycolor" = "none"`)
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125 without hiding the entire primitive `"visibility" = "off"`.
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126
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127 - A new property `"FontSmoothing"` has been added to text and axes
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128 objects that controls whether anti-aliasing is used during the
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129 rendering of characters. The default is `"on"` which produces smooth,
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130 more visually appealing text.
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131
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132 - The figure property `"windowscrollwheelfcn"`is now implemented.
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133 This makes it possible to provide a callback function to be executed
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134 when users manipulate the mouse wheel on a given figure.
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135
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136 - The figure properties `"pointer"`, `"pointershapecdata"`, and
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137 `"pointershapehotspot"` are now implemented. This makes it possible
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138 to change the shape of the cursor (pointer in Matlab-speak) displayed
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139 in a plot window.
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140
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141 - The figure property `"paperpositionmode"` now has the default `"auto"`
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142 rather than `"manual"`. This change is more intuitive and is
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143 Matlab compatible.
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144
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145 - The appearance of patterned lines `"LineStyle" = ":"|"--"|"-."` has
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146 been improved for small widths (`"LineWidth"` less than 1.5 pixels)
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147 which is a common scenario.
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148
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149 - Printing to EPS files now uses a tight bounding box (`"-tight"`
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150 argument to print) by default. This makes more sense for EPS
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151 files which are normally embedded within other documents, and is
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152 Matlab compatible. If necessary use the `"-loose"` option to
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153 reproduce figures as they appeared in previous versions of Octave.
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154
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155 - The following print devices are no longer officially supported: cdr,
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156 corel, aifm, ill, cgm, hpgl, mf and dxf. A warning will be thrown
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157 when using those devices, and the code for supporting those formats
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158 will eventually be removed from a future version of Octave.
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159
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160 - The placement of text subscripts and superscripts has been
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161 re-engineered and now produces visually attractive results similar to
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162 Latex.
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163
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164 #### Packages
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165
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166 - `pkg describe` now lists dependencies and inverse dependencies
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167 (i.e., other installed packages that depend on the package in
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168 question).
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169
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170 - `pkg test` now tests all functions in a package.
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171
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172 - When unloading a package, `pkg` now checks if any remaining loaded
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173 packages depend on the one to be removed. If this is the case `pkg`
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174 aborts with an explanatory error message. This behavior can be
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175 overridden with the `-nodeps` option.
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176
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177 ### Matlab compatibility
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178
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179 - The function `unique` now returns column index vectors for the second
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180 and third outputs. When duplicate values are present, the default
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181 index to return is now the `"first"` occurrence. The previous Octave
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182 behavior, or Matlab behavior from releases prior to R2012b, can be
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183 obtained by using the `"legacy"` flag.
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184
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185 - The function `setdiff` with the `"rows"` argument now returns Matlab
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186 compatible results. The previous Octave behavior, or Matlab behavior
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187 from releases prior to R2012b, can be obtained by using the `"legacy"`
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188 flag.
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189
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190 - The functions `intersect`, `setxor`, and `union` now accept a
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191 `"legacy"` flag which changes the index values (second and third
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192 outputs) as well as the orientation of all outputs to match Matlab
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193 releases prior to R2012b.
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194
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195 - The function `streamtube` is Matlab compatible and plots tubes along
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196 streamlines which are scaled by the vector field divergence. The
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197 Octave-only extension `ostreamtube` can be used to visualize the flow
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198 expansion and contraction of the vector field due to the local
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199 crossflow divergence.
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200
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201 - The interpreter now supports handles to nested functions.
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202
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203 - The graphics properties `"LineWidth"` and `"MarkerSize"` are now
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204 measured in points, *not* pixels. Compared to previous versions
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205 of Octave, some lines and markers will appear 4/3 larger.
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206
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207 - The meta.class property "SuperClassList" has been renamed
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208 "Superclasslist" for Matlab compatibility. The original name will
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209 exist as an alias until Octave version 8.1.
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210
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211 - Inline functions created by the function `inline` are now of type
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212 "inline" when interrogated with the `class` function. In previous
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213 versions of Octave, the class returned was "function_handle". This
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214 change is Matlab compatible. Inline functions are deprecated in
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215 both Matlab and Octave and support may eventually be removed.
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216 Anonymous functions can be used to replace all instances of inline
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217 functions.
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218
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219 - The function `javaaddpath` now prepends new directories to the
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220 existing dynamic classpath by default. To append them instead, use
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221 the new `"-end"` argument. Multiple directories may now be specified
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222 in a cell array of strings.
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223
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224 - An undocumented function `gui_mainfcn` has been added, for compatibility
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225 with figures created with Matlab's GUIDE.
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226
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227 - Several validator functions of type `mustBe*` have been added. See
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228 the list of new functions below.
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229
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230
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231 ### Deprecated functions and properties
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232
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233 The following functions and properties have been deprecated in Octave 6
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234 and will be removed from Octave 8 (or whatever version is the second
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235 major release after 6):
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236
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237 - Functions
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238
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239 Function | Replacement
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240 -----------------------|------------------
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241 `runtests` | `oruntests`
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242
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243 - The environment variable used by `mkoctfile` for linker flags is now
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244 `LDFLAGS` rather than `LFLAGS`. `LFLAGS` is deprecated, and a warning
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245 is emitted if it is used, but it will continue to work.
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246
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247
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248 ### Removed functions and properties
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249
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250 The following functions and properties were deprecated in Octave 4.4
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251 and have been removed from Octave 6.
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252
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253 - Functions
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254
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255 Function | Replacement
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256 ---------------------|------------------
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257 `chop` | `sprintf` for visual results
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258 `desktop` | `isguirunning`
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259 `tmpnam` | `tempname`
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260 `toascii` | `double`
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261 `java2mat` | `__java2mat__`
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262
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263 - Properties
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264
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265 Object | Property | Value
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266 ---------------------|---------------------------|-----------------------
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267 `annotation` | `edgecolor ("rectangle")` |
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268 `axes` | `drawmode` |
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269 `figure` | `doublebuffer` |
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270 | `mincolormap` |
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271 | `wvisual` |
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272 | `wvisualmode` |
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273 | `xdisplay` |
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274 | `xvisual` |
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275 | `xvisualmode` |
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276 `line` | `interpreter` |
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277 `patch` | `interpreter` |
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278 `surface` | `interpreter` |
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279 `text` | `fontweight` | `"demi"` and `"light"`
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280 `uibuttongroup` | `fontweight` | `"demi"` and `"light"`
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281 `uicontrol` | `fontweight` | `"demi"` and `"light"`
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282 `uipanel` | `fontweight` | `"demi"` and `"light"`
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283 `uitable` | `fontweight` | `"demi"` and `"light"`
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284
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285
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286 ### Alphabetical list of new functions added in Octave 6
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287
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288 * `auto_repeat_debug_command`
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289 * `commandhistory`
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290 * `commandwindow`
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291 * `filebrowser`
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292 * `is_same_file`
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293 * `lightangle`
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294 * `mustBeFinite`
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295 * `mustBeGreaterThan`
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296 * `mustBeGreaterThanOrEqual`
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297 * `mustBeInteger`
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298 * `mustBeLessThan`
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299 * `mustBeLessThanOrEqual`
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300 * `mustBeMember`
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301 * `mustBeNegative`
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302 * `mustBeNonempty`
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303 * `mustBeNonNan`
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304 * `mustBeNonnegative`
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305 * `mustBeNonpositive`
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306 * `mustBeNonsparse`
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307 * `mustBeNonzero`
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308 * `mustBeNumeric`
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309 * `mustBeNumericOrLogical`
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310 * `mustBePositive`
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311 * `mustBeReal`
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312 * `namedargs2cell`
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313 * `newline`
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314 * `ode23s`
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315 * `ostreamtube`
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316 * `rescale`
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317 * `rotx`
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318 * `roty`
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319 * `rotz`
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320 * `stream2`
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321 * `stream3`
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322 * `streamline`
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323 * `streamtube`
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324 * `uisetfont`
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325 * `verLessThan`
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326 * `web`
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327 * `weboptions`
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328 * `webread`
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329 * `webwrite`
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330 * `workspace`