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Merged closed branch "kai" into default.
author Kai T. Ohlhus <k.ohlhus@gmail.com>
date Tue, 01 Nov 2016 01:06:10 +0100
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1 <pre>
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2 Summary of important user-visible changes for version 4.0:
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3 ---------------------------------------------------------
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4
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5 ** A graphical user interface is now the default when running Octave
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6 interactively. The start-up option --no-gui will run the familiar
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7 command line interface, and still allows use of the GUI dialogs and
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8 qt plotting toolkit. The option --no-gui-libs runs a minimalist
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9 command line interface that does not link with the Qt libraries and
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10 uses the fltk toolkit for plotting.
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11
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12 ** Octave now uses OpenGL graphics with Qt widgets by default. If OpenGL
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13 libraries are not available when Octave is built, gnuplot is used.
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14 You may choose to use the fltk or gnuplot toolkit for graphics by
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15 executing the command
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16
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17 graphics_toolkit ("fltk")
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18 OR
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19 graphics_toolkit ("gnuplot")
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20
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21 Adding such a command to your ~/.octaverc file will set the default
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22 for each session.
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23
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24 ** A new syntax for object oriented programming termed classdef has been
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25 introduced. See the manual for more extensive documentation of the
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26 classdef interface.
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27
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28 New keywords:
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29
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30 classdef endclassdef
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31 enumeration endenumeration
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32 events endevents
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33 methods endmethods
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34 properties endproperties
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35
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36 ** New audio functions and classes:
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37
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38 audiodevinfo audioread sound
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39 audioinfo audiorecorder soundsc
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40 audioplayer audiowrite
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41
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42 ** Other new classes in Octave 4.0:
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43
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44 audioplayer inputParser
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45 audiorecorder
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46
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47 ** Optional stricter Matlab compatibility for ranges, diagonal matrices,
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48 and permutation matrices.
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49
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50 Octave has internal optimizations which use space-efficient storage
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51 for the three data types above. Three new functions have been added
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52 which control whether the optimizations are used (default), or whether
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53 the data types are stored as full matrices.
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54
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55 disable_range disable_diagonal_matrix disable_permutation_matrix
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56
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57 All three optimizations are disabled if Octave is started with the
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58 --braindead command line option.
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59
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60 ** The preference
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61
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62 do_braindead_shortcircuit_evaluation
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63
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64 is now enabled by default.
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65
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66 ** The preference
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67
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68 allow_noninteger_range_as_index
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69
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70 is now enabled by default and the warning ID
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71
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72 Octave:noninteger-range-as-index
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73
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74 is now set to "on" by default instead of "error" by default and "on"
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75 for --traditional.
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76
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77 ** The "backtrace" warning option is now enabled by default. This change
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78 was made for Matlab compatibility.
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79
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80 ** For compatibility with Matlab, the "ismatrix (x)" function now only checks
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81 the dimension of "x". The old behaviour of "ismatrix" is obtained by
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82 "isnumeric (x) || islogical (x) || ischar (x)".
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83
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84 ** The nextpow2 function behaviour has been changed for vector inputs.
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85 Instead of computing `nextpow2 (length (x))', it will now compute
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86 nextpow2 for each element of the input. This change is Matlab compatible,
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87 and also prevents bugs for "vectors" of length 1.
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88
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89 ** polyeig now returns a row vector of eigenvalues rather than a matrix
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90 with the eigenvalues on the diagonal. This change was made for Matlab
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91 compatibility.
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92
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93 ** Interpolation function changes for Matlab compatibility
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94
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95 The interpolation method 'cubic' is now equivalent to 'pchip'
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96 for interp1, interp2, and interp3. Previously, 'cubic' was equivalent
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97 to 'spline' for interp2. This may produce different results as 'spline'
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98 has continuous 1st and 2nd derivatives while 'pchip' only has a continuous
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99 1st derivative. The methods 'next' and 'previous' have been added to
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100 interp1 for compatibility.
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101
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102 ** The delaunay function has been extended to accept 3-D inputs for
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103 Matlab compatibility. The delaunay function no longer plots the
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104 triangulation if no output argument is requested, instead, the
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105 triangulation is always returned. The delaunay3 function which
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106 handles 3-D inputs has been deprecated in favor of delaunay.
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107
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108 ** The trigonometric functions asin and acos return different phase values
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109 from previous versions of Octave when the input is outside the principal
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110 branch ([-1, 1]). If the real portion of the input is greater than 1 then
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111 the limit from below is taken. If the real portion is less than 1 then the
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112 limit from above is taken. This criteria is consistent with several other
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113 numerical analysis software packages.
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114
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115 ** The hyperbolic function acosh now returns values with a phase in the range
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116 [-pi/2, +pi/2]. Previously Octave returned values in the range [0, pi].
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117 This is consistent with several other numerical analysis software packages.
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118
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119 ** strfind changes when using empty pattern ("") for Matlab compatibility
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120
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121 strfind now returns an empty array when the pattern itself is empty.
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122 In previous versions of Octave, strfind matched at every character
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123 location when the pattern was empty.
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124
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125 NEW
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126 strfind ("abc", "") => []
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127 OLD
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128 strfind ("abc", "") => [1, 2, 3, 4]
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129
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130 ** Integer formats used in the printf family of functions now work for
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131 64-bit integers and are more compatible with Matlab when printing
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132 non-integer values. Now instead of truncating, Octave will switch
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133 the effective format to '%g' in the following circumstances:
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134
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135 * the value of an integer type (int8, uint32, etc.) value exceeds
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136 the maximum for the format specifier. For '%d', the limit is
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137 intmax ('int64') and for '%u' it is intmax ('uint64').
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138
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139 * round(x) != x or the value is outside the range allowed by the
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140 integer format specifier.
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141
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142 There is still one difference: Matlab switches to '%e' and Octave
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143 switches to '%g'.
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144
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145 ** The functions intersect, setdiff, setxor, and union now return a
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146 column vector as output unless the input was a row vector. This change
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147 was made for Matlab compatibility.
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148
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149 ** The inpolygon function now returns true for points that are within
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150 the polygon OR on it's edge. This change was made for Matlab
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151 compatibility.
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152
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153 ** The archive family of functions (bzip2, gzip, zip, tar) and their
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154 unpacking routines (bunzip2, gunzip, unzip, untar, unpack) have
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155 been recoded. Excepting unpack, the default is now to place files
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156 in the same directory as the archive (on unpack) or as the original
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157 files (on archiving).
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158
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159 ** Qt and FLTK graphics toolkits now support offscreen rendering on Linux.
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160 In other words, print will work even when the figure visibility is "off".
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161
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162 ** Z-order stacking issues with patches, grid lines, and line object
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163 plot markers for on screen display and printing have all been resolved.
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164 For 2-D plots the axis grid lines can be placed on top of the plot
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165 with set (gca, "layer", "top").
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166
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167 ** The patch graphic object has been overhauled. It now produces visual
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168 results equivalent to Matlab even for esoteric combinations of
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169 faces/vertices/cdata.
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170
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171 ** The polar() plot function now draws a circular theta axis and
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172 radial rho axis rather than using a rectangular x/y axis.
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173
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174 ** linkprop has been completely re-coded for performance and Matlab
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175 compatibility. It now returns a linkprop object which must be stored
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176 in a variable for as long as the graphic objects should remain linked.
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177 To unlink properties use 'clear hlink' where hlink is the variable
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178 containing the linkprop object.
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179
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180 ** isprime has been extended to operate on negative and complex inputs.
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181
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182 ** xor has been extended to accept more than two arguments in which case
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183 it performs cumulative XOR reduction.
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184
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185 ** The following functions now support N-dimensional arrays:
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186
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187 fliplr flipud rot90 rectint
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188
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189 ** The new warning ID "Octave:data-file-in-path" replaces the three
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190 previous separate warning IDs "Octave:fopen-file-in-path",
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191 "Octave:load-file-in-path", and "Octave:md5sum-file-in-path".
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192
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193 ** The warning ID Octave:singular-matrix-div has been replaced by
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194 Octave:nearly-singular-matrix and Octave:singular-matrix.
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195
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196 ** The warning ID Octave:matlab-incompatible has been replaced by
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197 Octave:language-extension to better reflect its meaning.
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198
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199 ** The warning ID Octave:broadcast has been removed. Instead automatic
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200 broadcasting will throw an Octave:language-extension warning. This
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201 warning ID is used for broadcasting as well as other features not
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202 available in Matlab.
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203
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204 ** Other new functions added in 4.0:
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205
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206 annotation
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207 bandwidth
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208 cubehelix
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209 dir_in_loadpath
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210 flip
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211 frame2im
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212 get_home_directory
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213 hgload
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214 hgsave
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215 ichol
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216 ilu
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217 im2frame
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218 isbanded
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219 isdiag
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220 isstudent
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221 istril
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222 istriu
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223 javachk
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224 jit_failcnt
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225 linkaxes
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226 lscov
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227 metaclass
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228 numfields
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229 open
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230 ordschur
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231 pan
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232 qmr
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233 rotate
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234 rotate3d
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235 sylvester
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236 unsetenv
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237 validateattributes
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238 zoom
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239
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240 ** inline() scheduled for eventual deprecation by Matlab
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241
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242 Functions created through the use of inline are scheduled for deprecation
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243 by Matlab. When this occurs Octave will continue to support inline
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244 functions for an indeterminate amount of time before also removing support.
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245 All new code should use anonymous functions in place of inline functions.
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246
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247 ** Deprecated functions.
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248
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249 The following functions have been deprecated in Octave 4.0 and will
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250 be removed from Octave 4.4 (or whatever version is the second major
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251 release after 4.0):
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252
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253 Function | Replacement
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254 ---------------------|------------------
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255 bicubic | interp2
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256 delaunay3 | delaunay
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257 dump_prefs | individual preference get/set routines
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258 find_dir_in_path | dir_in_loadpath
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259 finite | isfinite
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260 fmod | rem
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261 fnmatch | glob or regexp
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262 loadaudio | audioread
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263 luinc | ilu or ichol
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264 mouse_wheel_zoom | mousewheelzoom axes property
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265 nfields | numfields
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266 octave_tmp_file_name | tempname
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267 playaudio | audioplayer
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268 saveaudio | audiowrite
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269 syl | sylvester
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270 usage | print_usage
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271
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272 allow_noninteger_range_as_index
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273 do_braindead_shortcircuit_evaluation
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274 setaudio
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275
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276 ** The following functions were deprecated in Octave 3.8 and will be
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277 removed from Octave 4.2 (or whatever version is the second major
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278 release after 3.8):
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279
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280 default_save_options java_new
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281 gen_doc_cache java_unsigned_conversion
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282 interp1q javafields
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283 isequalwithequalnans javamethods
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284 java_convert_matrix re_read_readline_init_file
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285 java_debug read_readline_init_file
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286 java_invoke saving_history
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287
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288 ** The following functions were deprecated in Octave 3.6 and have been
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289 removed from Octave 4.0.
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290
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291 cut polyderiv
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292 cor shell_cmd
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293 corrcoef studentize
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294 __error_text__ sylvester_matrix
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295 error_text
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296
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297 ** The following keywords were deprecated in Octave 3.8 and have been
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298 removed from Octave 4.0
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299
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300 static
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301
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302 ** The following configuration variables were deprecated in Octave 3.8
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303 and have been removed from Octave 4.0
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304
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305 CC_VERSION (now GCC_VERSION)
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306 CXX_VERSION (now GXX_VERSION)
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307
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308 ** The internal function atan2 of the sparse matrix class has been deprecated
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309 in Octave 4.0 and will be removed from Octave 4.4 (or whatever version is
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310 the second major release after 4.0). Use the Fatan2 function with sparse
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311 inputs as a replacement.
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312
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313 ** The internal class Octave_map was deprecated in Octave 3.8 and has
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314 been removed from Octave 4.0. Replacement classes are
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315 octave_map (struct array) or octave_scalar_map for a single structure.
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316
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317 ** The configure option --enable-octave-allocator has been removed.
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318 The internal class octave_allocator declared in oct-alloc.h has
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319 been removed. The header remains, but is deprecated. The macros to
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320 access the class (DECLARE_OCTAVE_ALLOCATOR, DEFINE_OCTAVE_ALLOCATOR,
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321 and DEFINE_OCTAVE_ALLOCATOR2) are now unconditionally defined to be
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322 empty.
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323
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324 ** Octave now has OpenMP enabled by default if the system provides a
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325 working OpenMP implementation. This allows oct-file modules to take
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326 advantage of OpenMP if desired. This can be disabled when building
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327 Octave with the configure option --disable-openmp.
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328
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329 ** Octave now automatically truncates intermediate calculations done with
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330 floating point values to 64 bits. Some hardware math co-processors, such
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331 as the x87, maintain extra precision, but this leads to disagreements in
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332 calculations when compared to reference implementations in software using
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333 the IEEE standard for double precision. There was no measurable
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334 performance impact to this change, but it may be disabled with the
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335 configure option --disable-float-truncate. MinGW and Cygwin platforms,
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336 as well as GCC compilers >= 5.0 require this feature. Non-x87 hardware,
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337 or hardware using SSE options exclusively, can disable float truncation
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338 if desired.
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339 </pre>