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Octave 7.1.0 release 2022-04-06
author Kai T. Ohlhus <k.ohlhus@gmail.com>
date Fri, 08 Apr 2022 22:23:16 +0900
parents
children
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1 ---
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2 layout: page
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3 title: GNU Octave Version 7
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4 permalink: NEWS-7.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 April 06, 2022
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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 - Many functions in Octave can be called in a command form---no
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24 parentheses for invocation and no return argument assignment---or in a
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25 functional form---parentheses and '=' for assignment of return values.
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26
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27 **Command Form Example**
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28
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29 `mkdir new_directory`
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30
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31 **Function Form Example**
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32
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33 `status = mkdir ("new_directory")`
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34
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35 Octave now handles errors that occur in a consistent manner. If
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36 called in command form and there is a failure, an error is thrown
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37 and a message printed. If called in functional form, no error or
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38 message is printed and the failure is communicated to the programmer
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39 via the output status variable.
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40
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41 The following list of functions have been modified.
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42
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43 * `copyfile`
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44 * `fcntl`
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45 * `fileattrib`
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46 * `kill`
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47 * `link`
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48 * `mkfifo`
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49 * `movefile`
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50 * `rename`
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51 * `rmdir`
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52 * `symlink`
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53 * `unlink`
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54
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55 - Calling a user-defined function with too many inputs or outputs is now
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56 an error. The interpreter makes this check automatically. If a
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57 function uses `varargin` then the check is skipped for function inputs,
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58 and if a function uses `varargout` then the check is skipped for function
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59 outputs. Input validation for functions typically begins with checking
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60 that the number of inputs and outputs match expectations. Existing code
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61 can be simplified by removing these checks which are now done by the
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62 interpreter. Typically, code blocks like the following can simply be
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63 deleted.
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64
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65 ## Checking number of inputs
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66 if (nargin > 2)
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67 print_usage ();
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68 endif
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69
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70 ## Checking number of outputs
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71 if (nargout > 1)
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72 print_usage ();
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73 endif
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74
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75 - Binary and hexadecimal constants like `0b101` and `0xDEADBEEF` now
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76 create integers (unsigned by default) with sizes determined from the
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77 number of digits present. For example, `0xff` creates a `uint8` value
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78 and `0xDEADBEEF` creates a `uint64` value. You may also use a suffix of
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79 the form `u8`, `u16`, `u32`, `u64`, `s8`, `s16`, `s32`, or `s64` to
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80 explicitly specify the data type to use (`u` or `s` to indicate unsigned
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81 or signed and the number to indicate the integer size).
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82
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83 Binary constants are limited to 64 binary digits and hexadecimal
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84 constants are limited to 16 hexadecimal digits with no automatic
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85 rounding or conversion to floating point values. Note that this may
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86 cause problems in existing code. For example, an expression like
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87 `[0x1; 0x100; 0x10000]` will be uint8 (because of the rules of
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88 concatenating integers of different sizes) with the larger values
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89 truncated (because of the saturation semantics of integer values). To
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90 avoid these kinds of problems either: 1) declare the first integer to be
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91 of the desired size such as `[0x1u32; 0x100; 0x10000]`, or 2) pad
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92 constants in array expressions with leading zeros so that they use the
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93 same number of digits for each value such as
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94 `[0x00_00_01; 0x00_01_00; 0x01_00_00]`.
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95
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96 - The colon operator now works for integer (int8, int16, ..., uint64)
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97 and single data types. However, only double ranges use a
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98 memory-efficient storage scheme internally. Other data types are
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99 stored as ordinary arrays.
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100
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101 - The increment and decrement operators `++` and `--` must "hug" their
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102 corresponding variables. In previous versions of Octave, whitespaces
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103 between these operators and the variable they affect were allowed. That
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104 is no longer the case.
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105
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106 - The `mldivide` function (i.e., the `\` operator) now uses an LU
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107 decomposition to solve nearly singular full square matrices. This is
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108 Matlab-compatible and yields results which more nearly minimize `norm
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109 (A*x - b)`. Previously, Octave computed a minimum-norm solution.
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110
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111 - The `factor` function has been overhauled for speed. For large
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112 inputs > 1e14, it can be up to 10,000 times faster.
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113
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114 - The `isprime` function uses a new primality testing algorithm
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115 that is up to 50,000 times faster for inputs > 1e14.
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116
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117 - The `betainc` function now calculates an exact output for the
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118 important special cases where a or b are 1.
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119
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120 - The `whos` function now displays an additional attribute 's' when
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121 the variable is a sparse type.
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122
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123 - As part of GSoC 2020, Abdallah K. Elshamy implemented the
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124 `jsondecode` and `jsonencode` functions to read and write JSON data.
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125
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126 - As part of GSoC 2021, Abdallah K. Elshamy implemented the
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127 `jupyter_notebook` classdef class. This class supports running and
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128 filling Jupyter Notebooks using the Octave language kernel from Octave
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129 itself. Making the evaluation of long-running Jupyter Notebooks on a
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130 computing server without permanent browser connection possible.
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131
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132 - By default, the history file is now located at `$DATA/octave/history`,
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133 where `$DATA` is a platform dependent location for (roaming) user data
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134 files (e.g., `${XDG_DATA_HOME}` or, if that is not set, `~/.local/share` on
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135 Unix-like operating systems or `%APPDATA%` on Windows).
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136
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137 - For Octave on Windows OS, the minimum required version of the Windows
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138 API is now 6.1 (Windows 7 or newer).
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139
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140 - The non-re-entrant version of the QHull library "libqhull" was
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141 deprecated upstream. Octave now (optionally) requires the re-entrant
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142 version of that library "libqhull_r" instead.
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143
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144 - Octave's build system no longer appends "++" to the end of the
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145 "magick++" library name (set with the `--with-magick=` configure flag).
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146 The real name of the "magick++" library (including any potentially
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147 trailing "++") needs to be set in that option now.
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148
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149 - The `pkg update` command now accepts options that are passed to `pkg install` for each updated package. Specifying `-local` or
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150 `-global` will restrict update checks to local or global
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151 installed packages, respectively.
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152
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153 ### Graphical User Interface
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154
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155 - The graphical user interface is now available in Hungarian and
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156 Turkish.
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157
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158 - In debug mode, symbol values are now shown in tooltips when hovering
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159 variables in the editor panel.
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160
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161 - The "Disable global shortcuts when Command Window has focus" GUI
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162 preference under the Shortcuts tab is now disabled by default. This
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163 option disables keyboard shortcuts to avoid interference with readline
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164 key strokes in the Command Window. Unlike versions prior to Octave 7,
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165 this preference now also affects the Ctrl-C/V shortcuts for copy/paste.
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166
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167 - In command line mode, i.e. when Octave is started without the `--gui` option,
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168 the doc command now opens the GUI documentation browser as a standalone widget,
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169 provided that Octave was compiled with GUI support.
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170
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171 ### Graphics backend
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172
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173 - Support for Qt4 for both graphics and the GUI has been removed.
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174
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175 - If a working LaTeX tool chain is found on the path, including `latex`,
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176 `dvipng`, and `dvisvgm` binaries, then text strings can now be rendered
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177 properly when using the `"latex"` value for the text objects'
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178 `"interpreter"` property and axes objects' `"ticklabelinterpreter"`.
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179 Type `doc "latex interpreter"` for further info.
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180
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181 - The `"Marker"` property for plot objects now accepts `|` which draws
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182 a vertical line or `_` which draws a horizontal line.
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183
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184 - The `FMT` format argument for plot commands now accepts long forms for
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185 color names which may be more understandable than the existing
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186 one-letter codes. For example, the RGB value `[0 0 0]` can now be
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187 specified by `"black"` in addition to `"k"`.
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188
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189 - The color graphics properties, for example `"EdgeColor"` or
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190 `"FaceColor"`, now accept HTML specifications. An HTML specification is
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191 a string that begins with the character '#' and is followed by either 3
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192 or 6 hexadecimal digits. For example, magenta which is 100% red and
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193 blue values can specified by `"#FF00FF"` or `"#F0F"`.
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194
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195 - The additional property `"contextmenu"` has been added to all graphics
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196 objects. It is equivalent to the previously used `"uicontextmenu"`
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197 property which is hidden now.
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198
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199 - `uicontrol` objects now fully implement the `"Off"` and `"Inactive"`
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200 values of the `"Enable"` property. When the value is `"Off"`, no
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201 interaction with the object occurs and the `uicontrol` changes color
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202 (typically to gray) to indicate it is disabled. When the value is
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203 `"Inactive"`, the object appears normally (no change in color), but it
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204 is not possible to change the value of the object (such as modifying
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205 text in an `Edit` box or clicking on a `RadioButton`).
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206
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207 - The `"ListBoxTop"` property for `uicontrol` objects has been
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208 implemented for `set` commands.
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209
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210 - The `Title` property for print formats such as PDF or SVG is now set
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211 to the title displayed on the figure window which contains the plot.
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212
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213 - Additional properties have been added to the `axes` graphics object:
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214 * `"alphamap"` (not yet implemented)
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215 * `"alphascale"` (not yet implemented)
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216 * `"colorscale"` (not yet implemented)
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217 * `"fontsizemode"` (not yet implemented)
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218 * `"innerposition"` (equivalent to `"position"`)
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219 * `"interactions"` (not yet implemented)
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220 * `"layout"` (not yet implemented)
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221 * `"legend"` (not yet implemented)
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222 * `"nextseriesindex"` (read-only, used by `scatter`
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223 graphics objects)
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224 * `"positionconstraint"` (replacement for `"activepositionproperty"`
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225 which is now a hidden property. No plans for removal.)
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226 * `"toolbar"` (not yet implemented)
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227 * `"xaxis"` (not yet implemented)
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228 * `"yaxis"` (not yet implemented)
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229 * `"zaxis"` (not yet implemented)
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230
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231 ### Matlab compatibility
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232
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233 - The function `griddata` now implements the `"v4"` Biharmonic Spline
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234 Interpolation method. In adddition, the function now accepts 3-D inputs
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235 by passing the data to `griddata3`.
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236
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237 - Coordinate transformation functions `cart2sph`, `sph2cart`,
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238 `cart2pol`, and `pol2cart` now accept either row or column vectors for
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239 coordinate inputs. A single coordinate matrix with one variable per
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240 column can still be used as function input, but a single output variable
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241 will now contain just the first output coordinate, and will no longer
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242 return the full output coordinate matrix. Output size matches the size
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243 of input vectors, or in the case of an input matrix will be column
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244 vectors with rows corresponding to the input coordinate matrix.
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245
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246 - The function `dec2bin` and `dec2hex` now support negative numbers.
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247
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248 - The function `factor` now supports uint64 inputs larger than
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249 `flintmax`.
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250
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251 - The function `primes` now supports char inputs.
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252
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253 - The functions `quantile` and `prctile` now permit operating on
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254 dimensions greater than `ndims (x)`.
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255
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256 - The function `iqr` now uses Matlab compatible interpolation for
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257 quantile values. The dimension input now allows a vector, "all", and
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258 dimensions greater than `ndims (x)`. The function also handles
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259 `Inf` and `NaN` input values in a Matlab-compatible manner.
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260
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261 - The function `importdata` now produces more compatible results when
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262 the file contains a 2-D text matrix.
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263
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264 - The file functions `copyfile`, `mkdir`, `movefile`, `rmdir` now return
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265 a logical value (true/false) rather than a numeric value (1/0).
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266
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267 - `uimenu` now accepts property `"Text"` which is identical to
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268 `"Label"`. Matlab recommends using `"Text"` in new code, although there
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269 is no announced date for deprecating `"Label"`.
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270
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271 - The functions `scatter` and `scatter3` now return a handle to a
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272 scatter graphics object. For compatibility, they return an `hggroup` of
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273 patch graphics objects when the `"gnuplot"` graphics toolkit is used. In
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274 previous versions of Octave, these functions returned an `hggroup` of
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275 patch graphics objects for all graphics toolkits.
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276
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277 - The functions `bar` and `barh` now handle stacked negative bar values
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278 in a Matlab-compatible manner. Negative values now stack below the zero
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279 axis independently of a positive value bars in the same stack.
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280 Previously the negative bars could overlap positive bars depending on
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281 drawing order.
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282
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283 - The functions `bar` and `barh` now use colors from the `"ColorOrder"`
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284 axes property rather than the `"Colormap"` figure property unless one
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285 of the histogram options (@qcode{"hist"}, @qcode{"histc"} was specified.
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286
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287 - The function `saveas` now defaults to saving in Octave figure format
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288 (.ofig) rather than PDF (.pdf).
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289
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290 - A new warning ID (`"Octave:unimplemented-matlab-functionality"`) has
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291 been added which prints a warning when Octave's parser recognizes valid
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292 Matlab code, but for which Octave does not yet implement the
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293 functionality. By default, this warning is enabled.
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294
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295 - When Octave is started with the `--traditional` option for maximum
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296 compatibility the `print_struct_array_contents` internal variable is set
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297 to true.
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298
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299 - The function `repelem` now produces a row vector output when the input is
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300 a scalar.
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301
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302 - The functions `var` and `std` now accept a weight vector as input and
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303 compute the weigthed variance. Dimension input now allows a vector and
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304 the keyword "all".
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305
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306
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307 ### Deprecated functions and operators
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308
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309 The following functions and operators have been deprecated in Octave 7
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310 and will be removed from Octave 9 (or whatever version is the second
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311 major release after 7):
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312
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313 - Functions
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314
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315 Function | Replacement
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316 ---------------------------- |----------------------------
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317 `disable_diagonal_matrix` | `optimize_diagonal_matrix`
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318 `disable_permutation_matrix` | `optimize_permutation_matrix`
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319 `disable_range` | `optimize_range`
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320
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321 - Operators
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322
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323 Operator | Replacement | Description
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diff changeset
324 ---------|-------------|------------
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325 `**` | `^` | Matrix exponent
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326 `.**` | `.^` | Element-by-element exponent
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327 `.+` | `+` | Element-by-element addition
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328 `.-` | `-` | Element-by-element subtraction
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329
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diff changeset
330 - Interpreter
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diff changeset
331
12bb9bb7602f Octave 7.1.0 release 2022-04-06
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332 * The use of `'...'` for line continuations *inside* double-quoted
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333 strings has been deprecated. Use `'\'` for line continuations
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diff changeset
334 inside strings instead.
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diff changeset
335
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336 * The use of `'\'` as a line continuation *outside* of double-quoted
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337 strings has been deprecated. Use `'...'` for line continuations
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diff changeset
338 instead.
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diff changeset
339
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340 * Any trailing whitespace after a `'\'` line continuation has been
12bb9bb7602f Octave 7.1.0 release 2022-04-06
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341 deprecated. Delete unnecessary trailing whitespace.
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342
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diff changeset
343
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344 The following functions were deprecated in Octave 6 and will be removed
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345 from Octave 8 (or whatever version is the second major release after 6):
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346
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347 - Functions
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348
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349 Function | Replacement
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diff changeset
350 -----------------------|------------------
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351 `runtests` | `oruntests`
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352
12bb9bb7602f Octave 7.1.0 release 2022-04-06
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353 - The environment variable used by `mkoctfile` for linker flags is now
12bb9bb7602f Octave 7.1.0 release 2022-04-06
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354 `LDFLAGS` rather than `LFLAGS`. `LFLAGS` was deprecated in Octave 6,
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355 and a warning is now emitted if it is used, but it will continue to
12bb9bb7602f Octave 7.1.0 release 2022-04-06
Kai T. Ohlhus <k.ohlhus@gmail.com>
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diff changeset
356 work.
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diff changeset
357
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diff changeset
358
12bb9bb7602f Octave 7.1.0 release 2022-04-06
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diff changeset
359 ### Removed functions, properties, and features
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diff changeset
360
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diff changeset
361 The following functions and properties were deprecated in Octave 5
12bb9bb7602f Octave 7.1.0 release 2022-04-06
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diff changeset
362 and have been removed from Octave 7.
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diff changeset
363
12bb9bb7602f Octave 7.1.0 release 2022-04-06
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diff changeset
364 - Functions
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diff changeset
365
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diff changeset
366 Function | Replacement
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diff changeset
367 -------------------------|------------------
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368 `output_max_field_width` | `output_precision`
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369 `is_keyword` | `iskeyword`
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diff changeset
370
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diff changeset
371 - Properties
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372
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373 Object | Property | Value
12bb9bb7602f Octave 7.1.0 release 2022-04-06
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diff changeset
374 -----------------|---------------|------------
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375 `text` | `fontangle` | `"oblique"`
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376 `uibuttongroup` | `fontangle` | `"oblique"`
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377 `uicontrol` | `fontangle` | `"oblique"`
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378 `uipanel` | `fontangle` | `"oblique"`
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379 `uitable` | `fontangle` | `"oblique"`
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diff changeset
380
12bb9bb7602f Octave 7.1.0 release 2022-04-06
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diff changeset
381 - The prototype JIT compiler has been removed from Octave. Since it was
12bb9bb7602f Octave 7.1.0 release 2022-04-06
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diff changeset
382 first added as part of a Google Summer of Code project in 2012, no one
12bb9bb7602f Octave 7.1.0 release 2022-04-06
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diff changeset
383 has ever seriously taken on further development of it and it still does
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384 nothing significant. It is out of date with the default interpreter
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385 that walks the parse tree. Even though we have fixed the configure
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386 script to disable it by default, people still ask questions about how to
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387 build it, but it doesn’t seem that they are doing that to work on it but
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388 because they think it will make Octave code run faster (it never did,
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389 except for some extremely simple bits of code as examples for
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390 demonstration purposes only). The following functions related to the
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391 JIT compiler have also been removed: `debug_jit`, `jit_enable`,
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392 `jit_failcnt`, and `jit_startcnt`.
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393
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394 ### Alphabetical list of new functions added in Octave 7
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395
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396 * `cospi`
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397 * `getpixelposition`
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398 * `endsWith`
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399 * `fill3`
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400 * `jsondecode`
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401 * `jsonencode`
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402 * `jupyter_notebook`
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403 * `listfonts`
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404 * `matlab.net.base64decode`
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405 * `matlab.net.base64encode`
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406 * `memory`
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407 * `ordqz`
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408 * `rng`
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409 * `sinpi`
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410 * `startsWith`
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411 * `streamribbon`
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412 * `turbo`
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413 * `uniquetol`
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414 * `xtickangle`
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415 * `ytickangle`
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416 * `ztickangle`
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417