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1 --- |
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2 layout: page |
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3 title: GNU Octave Version 4.0 |
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4 menu: false |
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5 permalink: NEWS-4.0.html |
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6 --- |
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7 |
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8 ## Summary of important user-visible changes |
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9 |
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10 May 23, 2015 |
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11 |
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12 {% include release_news_select.md %} |
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13 |
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14 <pre> |
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15 ** A graphical user interface is now the default when running Octave |
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16 interactively. The start-up option --no-gui will run the familiar |
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17 command line interface, and still allows use of the GUI dialogs and |
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18 qt plotting toolkit. The option --no-gui-libs runs a minimalist |
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19 command line interface that does not link with the Qt libraries and |
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20 uses the fltk toolkit for plotting. |
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21 |
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22 ** Octave now uses OpenGL graphics with Qt widgets by default. If OpenGL |
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23 libraries are not available when Octave is built, gnuplot is used. |
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24 You may choose to use the fltk or gnuplot toolkit for graphics by |
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25 executing the command |
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26 |
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27 graphics_toolkit ("fltk") |
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28 OR |
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29 graphics_toolkit ("gnuplot") |
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30 |
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31 Adding such a command to your ~/.octaverc file will set the default |
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32 for each session. |
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33 |
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34 ** A new syntax for object oriented programming termed classdef has been |
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35 introduced. See the manual for more extensive documentation of the |
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36 classdef interface. |
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37 |
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38 New keywords: |
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39 |
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40 classdef endclassdef |
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41 enumeration endenumeration |
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42 events endevents |
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43 methods endmethods |
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44 properties endproperties |
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45 |
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46 ** New audio functions and classes: |
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47 |
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48 audiodevinfo audioread sound |
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49 audioinfo audiorecorder soundsc |
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50 audioplayer audiowrite |
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51 |
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52 ** Other new classes in Octave 4.0: |
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53 |
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54 audioplayer inputParser |
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55 audiorecorder |
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56 |
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57 ** Optional stricter Matlab compatibility for ranges, diagonal matrices, |
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58 and permutation matrices. |
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59 |
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60 Octave has internal optimizations which use space-efficient storage |
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61 for the three data types above. Three new functions have been added |
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62 which control whether the optimizations are used (default), or whether |
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63 the data types are stored as full matrices. |
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64 |
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65 disable_range disable_diagonal_matrix disable_permutation_matrix |
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66 |
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67 All three optimizations are disabled if Octave is started with the |
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68 --braindead command line option. |
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69 |
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70 ** The preference |
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71 |
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72 do_braindead_shortcircuit_evaluation |
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73 |
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74 is now enabled by default. |
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75 |
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76 ** The preference |
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77 |
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78 allow_noninteger_range_as_index |
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79 |
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80 is now enabled by default and the warning ID |
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81 |
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82 Octave:noninteger-range-as-index |
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83 |
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84 is now set to "on" by default instead of "error" by default and "on" |
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85 for --traditional. |
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86 |
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87 ** The "backtrace" warning option is now enabled by default. This change |
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88 was made for Matlab compatibility. |
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89 |
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90 ** For compatibility with Matlab, the "ismatrix (x)" function now only checks |
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91 the dimension of "x". The old behaviour of "ismatrix" is obtained by |
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92 "isnumeric (x) || islogical (x) || ischar (x)". |
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93 |
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94 ** The nextpow2 function behaviour has been changed for vector inputs. |
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95 Instead of computing `nextpow2 (length (x))', it will now compute |
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96 nextpow2 for each element of the input. This change is Matlab compatible, |
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97 and also prevents bugs for "vectors" of length 1. |
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98 |
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99 ** polyeig now returns a row vector of eigenvalues rather than a matrix |
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100 with the eigenvalues on the diagonal. This change was made for Matlab |
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101 compatibility. |
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102 |
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103 ** Interpolation function changes for Matlab compatibility |
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104 |
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105 The interpolation method 'cubic' is now equivalent to 'pchip' |
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106 for interp1, interp2, and interp3. Previously, 'cubic' was equivalent |
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107 to 'spline' for interp2. This may produce different results as 'spline' |
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108 has continuous 1st and 2nd derivatives while 'pchip' only has a continuous |
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109 1st derivative. The methods 'next' and 'previous' have been added to |
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110 interp1 for compatibility. |
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111 |
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112 ** The delaunay function has been extended to accept 3-D inputs for |
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113 Matlab compatibility. The delaunay function no longer plots the |
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114 triangulation if no output argument is requested, instead, the |
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115 triangulation is always returned. The delaunay3 function which |
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116 handles 3-D inputs has been deprecated in favor of delaunay. |
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117 |
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118 ** The trigonometric functions asin and acos return different phase values |
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119 from previous versions of Octave when the input is outside the principal |
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120 branch ([-1, 1]). If the real portion of the input is greater than 1 then |
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121 the limit from below is taken. If the real portion is less than 1 then the |
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122 limit from above is taken. This criteria is consistent with several other |
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123 numerical analysis software packages. |
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124 |
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125 ** The hyperbolic function acosh now returns values with a phase in the range |
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126 [-pi/2, +pi/2]. Previously Octave returned values in the range [0, pi]. |
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127 This is consistent with several other numerical analysis software packages. |
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128 |
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129 ** strfind changes when using empty pattern ("") for Matlab compatibility |
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130 |
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131 strfind now returns an empty array when the pattern itself is empty. |
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132 In previous versions of Octave, strfind matched at every character |
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133 location when the pattern was empty. |
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134 |
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135 NEW |
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136 strfind ("abc", "") => [] |
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137 OLD |
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138 strfind ("abc", "") => [1, 2, 3, 4] |
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139 |
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140 ** Integer formats used in the printf family of functions now work for |
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141 64-bit integers and are more compatible with Matlab when printing |
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142 non-integer values. Now instead of truncating, Octave will switch |
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143 the effective format to '%g' in the following circumstances: |
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144 |
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145 * the value of an integer type (int8, uint32, etc.) value exceeds |
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146 the maximum for the format specifier. For '%d', the limit is |
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147 intmax ('int64') and for '%u' it is intmax ('uint64'). |
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148 |
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149 * round(x) != x or the value is outside the range allowed by the |
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150 integer format specifier. |
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151 |
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152 There is still one difference: Matlab switches to '%e' and Octave |
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153 switches to '%g'. |
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154 |
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155 ** The functions intersect, setdiff, setxor, and union now return a |
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156 column vector as output unless the input was a row vector. This change |
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157 was made for Matlab compatibility. |
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158 |
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159 ** The inpolygon function now returns true for points that are within |
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160 the polygon OR on it's edge. This change was made for Matlab |
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161 compatibility. |
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162 |
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163 ** The archive family of functions (bzip2, gzip, zip, tar) and their |
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164 unpacking routines (bunzip2, gunzip, unzip, untar, unpack) have |
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165 been recoded. Excepting unpack, the default is now to place files |
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166 in the same directory as the archive (on unpack) or as the original |
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167 files (on archiving). |
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168 |
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169 ** Qt and FLTK graphics toolkits now support offscreen rendering on Linux. |
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170 In other words, print will work even when the figure visibility is "off". |
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171 |
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172 ** Z-order stacking issues with patches, grid lines, and line object |
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173 plot markers for on screen display and printing have all been resolved. |
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174 For 2-D plots the axis grid lines can be placed on top of the plot |
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175 with set (gca, "layer", "top"). |
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176 |
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177 ** The patch graphic object has been overhauled. It now produces visual |
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178 results equivalent to Matlab even for esoteric combinations of |
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179 faces/vertices/cdata. |
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180 |
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181 ** The polar() plot function now draws a circular theta axis and |
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182 radial rho axis rather than using a rectangular x/y axis. |
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183 |
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184 ** linkprop has been completely re-coded for performance and Matlab |
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185 compatibility. It now returns a linkprop object which must be stored |
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186 in a variable for as long as the graphic objects should remain linked. |
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187 To unlink properties use 'clear hlink' where hlink is the variable |
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188 containing the linkprop object. |
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189 |
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190 ** isprime has been extended to operate on negative and complex inputs. |
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191 |
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192 ** xor has been extended to accept more than two arguments in which case |
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193 it performs cumulative XOR reduction. |
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194 |
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195 ** The following functions now support N-dimensional arrays: |
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196 |
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197 fliplr flipud rot90 rectint |
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198 |
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199 ** The new warning ID "Octave:data-file-in-path" replaces the three |
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200 previous separate warning IDs "Octave:fopen-file-in-path", |
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201 "Octave:load-file-in-path", and "Octave:md5sum-file-in-path". |
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202 |
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203 ** The warning ID Octave:singular-matrix-div has been replaced by |
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204 Octave:nearly-singular-matrix and Octave:singular-matrix. |
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205 |
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206 ** The warning ID Octave:matlab-incompatible has been replaced by |
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207 Octave:language-extension to better reflect its meaning. |
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208 |
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209 ** The warning ID Octave:broadcast has been removed. Instead automatic |
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210 broadcasting will throw an Octave:language-extension warning. This |
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211 warning ID is used for broadcasting as well as other features not |
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212 available in Matlab. |
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213 |
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214 ** Other new functions added in 4.0: |
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215 |
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216 annotation |
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217 bandwidth |
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218 cubehelix |
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219 dir_in_loadpath |
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220 flip |
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221 frame2im |
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222 get_home_directory |
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223 hgload |
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224 hgsave |
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225 ichol |
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226 ilu |
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227 im2frame |
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228 isbanded |
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229 isdiag |
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230 isstudent |
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231 istril |
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232 istriu |
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233 javachk |
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234 jit_failcnt |
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235 linkaxes |
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236 lscov |
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237 metaclass |
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238 numfields |
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239 open |
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240 ordschur |
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241 pan |
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242 qmr |
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243 rotate |
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244 rotate3d |
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245 sylvester |
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246 unsetenv |
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247 validateattributes |
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248 zoom |
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249 |
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250 ** inline() scheduled for eventual deprecation by Matlab |
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251 |
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252 Functions created through the use of inline are scheduled for deprecation |
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253 by Matlab. When this occurs Octave will continue to support inline |
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254 functions for an indeterminate amount of time before also removing support. |
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255 All new code should use anonymous functions in place of inline functions. |
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256 |
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257 ** Deprecated functions. |
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258 |
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259 The following functions have been deprecated in Octave 4.0 and will |
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260 be removed from Octave 4.4 (or whatever version is the second major |
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261 release after 4.0): |
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262 |
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263 Function | Replacement |
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264 ---------------------|------------------ |
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265 bicubic | interp2 |
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266 delaunay3 | delaunay |
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267 dump_prefs | individual preference get/set routines |
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268 find_dir_in_path | dir_in_loadpath |
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269 finite | isfinite |
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270 fmod | rem |
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271 fnmatch | glob or regexp |
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272 loadaudio | audioread |
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273 luinc | ilu or ichol |
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274 mouse_wheel_zoom | mousewheelzoom axes property |
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275 nfields | numfields |
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276 octave_tmp_file_name | tempname |
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277 playaudio | audioplayer |
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278 saveaudio | audiowrite |
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279 syl | sylvester |
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280 usage | print_usage |
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281 |
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282 allow_noninteger_range_as_index |
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283 do_braindead_shortcircuit_evaluation |
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284 setaudio |
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285 |
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286 ** The following functions were deprecated in Octave 3.8 and will be |
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287 removed from Octave 4.2 (or whatever version is the second major |
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288 release after 3.8): |
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289 |
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290 default_save_options java_new |
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291 gen_doc_cache java_unsigned_conversion |
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292 interp1q javafields |
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293 isequalwithequalnans javamethods |
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294 java_convert_matrix re_read_readline_init_file |
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295 java_debug read_readline_init_file |
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296 java_invoke saving_history |
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297 |
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298 ** The following functions were deprecated in Octave 3.6 and have been |
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299 removed from Octave 4.0. |
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300 |
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301 cut polyderiv |
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302 cor shell_cmd |
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303 corrcoef studentize |
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304 __error_text__ sylvester_matrix |
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305 error_text |
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306 |
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307 ** The following keywords were deprecated in Octave 3.8 and have been |
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308 removed from Octave 4.0 |
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309 |
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310 static |
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311 |
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312 ** The following configuration variables were deprecated in Octave 3.8 |
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313 and have been removed from Octave 4.0 |
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314 |
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315 CC_VERSION (now GCC_VERSION) |
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316 CXX_VERSION (now GXX_VERSION) |
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317 |
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318 ** The internal function atan2 of the sparse matrix class has been deprecated |
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319 in Octave 4.0 and will be removed from Octave 4.4 (or whatever version is |
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320 the second major release after 4.0). Use the Fatan2 function with sparse |
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321 inputs as a replacement. |
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322 |
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323 ** The internal class Octave_map was deprecated in Octave 3.8 and has |
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324 been removed from Octave 4.0. Replacement classes are |
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325 octave_map (struct array) or octave_scalar_map for a single structure. |
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326 |
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327 ** The configure option --enable-octave-allocator has been removed. |
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328 The internal class octave_allocator declared in oct-alloc.h has |
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329 been removed. The header remains, but is deprecated. The macros to |
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330 access the class (DECLARE_OCTAVE_ALLOCATOR, DEFINE_OCTAVE_ALLOCATOR, |
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331 and DEFINE_OCTAVE_ALLOCATOR2) are now unconditionally defined to be |
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332 empty. |
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333 |
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334 ** Octave now has OpenMP enabled by default if the system provides a |
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335 working OpenMP implementation. This allows oct-file modules to take |
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336 advantage of OpenMP if desired. This can be disabled when building |
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337 Octave with the configure option --disable-openmp. |
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338 |
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339 ** Octave now automatically truncates intermediate calculations done with |
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340 floating point values to 64 bits. Some hardware math co-processors, such |
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341 as the x87, maintain extra precision, but this leads to disagreements in |
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342 calculations when compared to reference implementations in software using |
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343 the IEEE standard for double precision. There was no measurable |
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344 performance impact to this change, but it may be disabled with the |
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345 configure option --disable-float-truncate. MinGW and Cygwin platforms, |
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346 as well as GCC compilers >= 5.0 require this feature. Non-x87 hardware, |
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347 or hardware using SSE options exclusively, can disable float truncation |
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348 if desired. |
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349 </pre> |