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NEWS.8.md: Minor copyedits to preexisting items
author Arun Giridhar <arungiridhar@gmail.com>
date Wed, 23 Nov 2022 04:56:45 -0500
parents e88ad18ca0ee
children 026b1a77f098 e3a133bf920f
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1 Summary of important user-visible changes for version 8 (yyyy-mm-dd):
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2 ---------------------------------------------------------------------
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3
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4 ### General improvements
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5
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6 - Octave's libraries are now built using symbol visibility by default.
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7 That means that fewer symbols are exported from these libraries.
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8 Configure with `--disable-lib-visibility-flags` to export all symbols
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9 (as in previous versions).
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10
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11 - `filter` is now 5X faster, which also speeds up `deconv`, `fftfilt`
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12 and `arma_rnd` by the same amount.
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13
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14 - `integral` can now output a second argument passing the error
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15 measurement used by the underlying integrator.
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16
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17 - `perms` now accepts a second argument "unique" to return only unique
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18 permutations for inputs with repeated elements. It is faster and
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19 takes less memory to call `perms ('aaaabbbbcccc', "unique")` than to
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20 call `unique (perms ('aaaabbbbcccc'), "rows")`.
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21
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22 - `quadgk` can now accept the `ArrayValued` input parameter to handle
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23 array-valued input functions.
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24
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25 - `delaunayn` now has consistent trivial simplex checking and removal
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26 for all input dimensions, simplex checking 3D inputs is now
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27 vectorized, and >3D simplex checking performance has been improved.
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28 Simplexes points are now ordered so they will all have positive
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29 outward normal vectors. Input type checking has also been added for
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30 improved error handling.
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31
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32 - `factor` now factorizes all 64-bit integers in roughly the same time.
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33 Previously, the product of two large primes took much longer to factorize
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34 than highly composite inputs.
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35
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36 - `Refine` option is now implemented in functions `ode45`, `ode23`,
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37 and `ode23s`.
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38
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39 - Octave is now compatible with PCRE2 (UTF-8). PCRE2 is preferred over PCRE
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40 if both are installed. Configure with `--without-pcre2` if you prefer Octave
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41 to use PCRE in this case.
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42
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43 ### Graphical User Interface
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44
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45 - The GUI has a dark style and several new icons in toolbars for better
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46 visibility and higher contrast.
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47
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48 - The GUI also has a new terminal widget, and comes with more fonts for the
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49 documentation browser.
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50
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51 ### Graphics backend
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52
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53 - When printing, the option `-svgconvert` is now the default. If you want to
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54 use the more limited EPS-based tool chain (the former default)&mdash;e.g., if
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55 you encounter inaccurate image rendering&mdash;you can pass the `-nosvgconvert`
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56 option to the `print` function.
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57
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58 - Additional properties have been added to the `figure` graphics object:
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59 * `"innerposition"` (equivalent to `"position"`)
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60 * `"windowstate"` (not yet implemented)
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61
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62 - Legend now features a new property `"itemhitfcn"`, allowing the
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63 execution of a callback function when a legend item is clicked.
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64
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65 ### Matlab compatibility
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66
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67 - `inline` functions now support all Matlab methods. The performance
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68 of `inline` functions has also been improved.
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69
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70 - `sub2ind` now supports index values outside of the size specified by
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71 the subscripts.
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72
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73 - `cylinder` now accepts a scalar for the radius argument.
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74
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75 - `clock` now has an optional second output `ISDST` which indicates if
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76 Daylight Savings Time is in effect for the system's time zone.
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77
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78 - `print` now accepts option `-image` to specify the "opengl" renderer
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79 and `-vector` to specify the "painters" renderer.
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80
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81 - `format` now accepts the option "default", which is equivalent to
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82 calling `format` without any options to reset the default state.
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83
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84 - `quadgk` now stops iterating when `error <= tolerance` while the previous
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85 condition was `error < tolerance`.
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86
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87 - `mean` now accepts vector dimensions and options to handle `NaN` values.
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88 The option `"a"` (arithmetic mean), `"g"` (geometric mean), and `"h"`
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89 (harmonic mean) are no longer accepted, only the arithmetic mean is computed.
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90 For the geometric and harmonic mean, please use respective functions
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91 `geomean` and `harmmean` from the Octave Statistics package.
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92
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93 - `var` and `std` now optionally output a second argument containing the mean
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94 or weighted mean.
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96 - `integral` can now accept the 'ArrayValued' option in combination with
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97 'RelTol' and 'WayPoints'.
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98
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99 - File system operations that remove files (e.g., `unlink` or `rmdir`) now also
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100 remove files that have their read-only file attribute set on Windows.
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101
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102 - The default state for certain graphics properties has been made
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103 consistent with Matlab.
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104
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105 Object | Property | Default State
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106 ------------|------------------|------------
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107 figure | "dockcontrols" | "on"
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108
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109 - `ode45`, `ode23`, and `ode23s` have improved results for options `Events`,
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110 `OutputFcn`, and `Refine`, along with corrected orientation of struct
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111 outputs.
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113 - *Early notice of future breaking changes*: Due to many user requests that
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114 Octave should have a Matlab-compatible string class, there is work under way
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115 to implement a string class, which will differ from a vector of characters.
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116 Currently in Octave, both 'foo' and "foo" are largely interchangeable,
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117 barring certain escape sequence interpretations that are present for one but
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118 not another. In future, that is likely to change as a consequence of
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119 implementing Matlab-style strings. This is required for other
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120 Matlab-compatibility activities as well.
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121
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122 *What this means for user code*: If you want to treat "foo" as a character
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123 vector as opposed to a string object, *and* if you intend to use a future
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124 version of Octave with string classes, then rewrite "foo" as 'foo'. If you
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125 need to retain the character vector behavior for "foo", you can continue to
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126 use Octave 8 with long-term support.
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127
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128 ### Alphabetical list of new functions added in Octave 8
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129
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130 * `clearAllMemoizedCaches`
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131 * `matlab.lang.MemoizedFunction`
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132 * `memoize`
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133 * `normalize`
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134 * `pagectranspose`
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135 * `pagetranspose`
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136 * `uifigure`
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137
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138 ### Deprecated functions, properties, and operators
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139
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140 The following functions and properties have been deprecated in Octave 8
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141 and will be removed from Octave 10 (or whatever version is the second
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142 major release after 8):
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143
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144 - Functions
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145
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146 Function | Replacement
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147 -----------------------|------------------
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148 shift | circshift
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149 sparse_auto_mutate | none (see below)
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150
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151 - The `sparse_auto_mutate` function no longer has any effect on Octave's
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152 behavior. Previously, after calling `sparse_auto_mutate (true)`,
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153 Octave would automatically convert sparse matrices to full when a
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154 sparse matrix required more memory than simply using full matrix
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155 storage. This setting was `false` by default for compatibility with
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156 Matlab. Now you must manually convert to full storage when desired.
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157
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158 - Properties
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159
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160 The following property names are discouraged, but there is no fixed
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161 date for their removal.
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162
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163 Object | Property | Replacement
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164 -----------------|-------------|------------
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165 uimenu | label | text
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166 uimenu | callback | menuselectedfcn
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167
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168 The following functions were deprecated in Octave 6 and have been removed
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169 from Octave 8.
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170
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171 - Functions
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172
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173 Function | Replacement
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174 -------------|------------
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175 runtests | oruntests
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176
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177 - The environment variable used by `mkoctfile` for linker flags is now
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178 `LDFLAGS` rather than `LFLAGS`. `LFLAGS` was deprecated in Octave 6,
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179 and will be removed in a future version of Octave.
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180
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181 ### Old release news
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182
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183 - [Octave 7.x](etc/NEWS.7)
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184 - [Octave 6.x](etc/NEWS.6)
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185 - [Octave 5.x](etc/NEWS.5)
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186 - [Octave 4.x](etc/NEWS.4)
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187 - [Octave 3.x](etc/NEWS.3)
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188 - [Octave 2.x](etc/NEWS.2)
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189 - [Octave 1.x](etc/NEWS.1)