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annotate NEWS-3.2.html @ 84:5caa2af27956 kai
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author | Kai T. Ohlhus <k.ohlhus@gmail.com> |
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date | Mon, 17 Oct 2016 18:36:54 +0200 |
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1 <pre> |
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2 Summary of important user-visible changes for version 3.2: |
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3 --------------------------------------------------------- |
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4 |
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5 ** Compatibility with Matlab graphics has been improved. |
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6 |
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7 The hggroup object and associated listener callback functions have |
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8 been added allowing the inclusion of group objects. Data sources |
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9 have been added to these group objects such that |
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10 |
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11 x = 0:0.1:10; |
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12 y = sin (x); |
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13 plot (x, y, "ydatasource", "y"); |
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14 for i = 1 : 100 |
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15 pause(0.1) |
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16 y = sin (x + 0.1 * i); |
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17 refreshdata(); |
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18 endfor |
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19 |
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20 works as expected. This capability has be used to introduce |
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21 stem-series, bar-series, etc., objects for better Matlab |
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22 compatibility. |
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23 |
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24 ** New graphics functions: |
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25 |
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26 addlistener ezcontour gcbo refresh |
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27 addproperty ezcontourf ginput refreshdata |
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28 allchild ezmesh gtext specular |
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29 available_backends ezmeshc intwarning surfl |
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30 backend ezplot ishghandle trisurf |
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31 cla ezplot3 isocolors waitforbuttonpress |
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32 clabel ezpolar isonormals |
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33 comet ezsurf isosurface |
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34 dellistener findall linkprop |
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35 diffuse gcbf plotmatrix |
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36 |
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37 ** New experimental OpenGL/FLTK based plotting system. |
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38 |
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39 An experimental plotting system based on OpenGL and the FLTK |
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40 toolkit is now part of Octave. This backend is disabled by |
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41 default. You can switch to using it with the command |
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42 |
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43 backend ("fltk") |
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44 |
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45 for all future figures or for a particular figure with the command |
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46 |
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47 backend (h, "fltk") |
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48 |
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49 where "h" is a valid figure handle. Please note that this backend |
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50 does not yet support text objects. Obviously, this is a necessary |
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51 feature before it can be considered usable. We are looking for |
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52 volunteers to help implement this missing feature. |
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53 |
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54 ** Functions providing direct access to gnuplot have been removed. |
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55 |
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56 The functions __gnuplot_plot__, __gnuplot_set__, __gnuplot_raw__, |
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57 __gnuplot_show__, __gnuplot_replot__, __gnuplot_splot__, |
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58 __gnuplot_save_data__ and __gnuplot_send_inline_data__ have been |
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59 removed from Octave. These function were incompatible with the |
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60 high level graphics handle code. |
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61 |
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62 ** The Control, Finance and Quaternion functions have been removed. |
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63 |
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64 These functions are now available as separate packages from |
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65 |
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66 http://octave.sourceforge.net/packages.html |
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67 |
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68 and can be reinstalled using the Octave package manager (see |
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69 the pkg function). |
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70 |
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71 ** Specific sparse matrix functions removed. |
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72 |
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73 The following functions, which handled only sparse matrices have |
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74 been removed. Instead of calling these functions directly, you |
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75 should use the corresponding function without the "sp" prefix. |
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76 |
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77 spatan2 spcumsum spkron spprod |
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78 spchol spdet splchol spqr |
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79 spchol2inv spdiag splu spsum |
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80 spcholinv spfind spmax spsumsqk |
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81 spcumprod spinv spmin |
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82 |
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83 ** Improvements to the debugger. |
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84 |
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85 The interactive debugging features have been improved. Stopping |
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86 on statements with dbstop should work correctly now. Stepping |
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87 into and over functions, and stepping one statement at a time |
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88 (with dbstep) now works. Moving up and down the call stack with |
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89 dbup and dbdown now works. The dbstack function is now available |
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90 to print the current function call stack. The new dbquit function |
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91 is available to exit the debugging mode. |
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92 |
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93 ** Improved traceback error messages. |
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94 |
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95 Traceback error messages are much more concise and easier to |
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96 understand. They now display information about the function call |
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97 stack instead of the stack of all statements that were active at |
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98 the point of the error. |
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99 |
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100 ** Object Oriented Programming. |
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101 |
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102 Octave now includes OOP features and the user can create their own |
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103 class objects and overloaded functions and operators. For |
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104 example, all methods of a class called "myclass" will be found in |
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105 a directory "@myclass" on the users path. The class specific |
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106 versions of functions and operators take precedence over the |
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107 generic versions of these functions. |
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108 |
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109 New functions related to OOP include |
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110 |
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111 class inferiorto isobject loadobj methods superiorto |
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112 |
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113 See the Octave manual for more details. |
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114 |
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115 ** Parsing of Command-style Functions. |
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116 |
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117 Octave now parses command-style functions without needing to first |
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118 declare them with "mark_as_command". The rules for recognizing a |
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119 command-style function calls are |
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120 |
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121 * A command must appear as the first word in a statement, |
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122 followed by a space. |
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123 |
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124 * The first character after the space must not be '=' or '(' |
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125 |
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126 * The next token after the space must not look like a binary |
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127 operator. |
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128 |
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129 These rules should be mostly compatible with the way Matlab parses |
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130 command-style function calls and allow users to define commands in |
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131 .m files without having to mark them as commands. |
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132 |
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133 Note that previous versions of Octave allowed expressions like |
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134 |
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135 x = load -text foo.dat |
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136 |
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137 but an expression like this will now generate a parse error. In |
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138 order to assign the value returned by a function to a variable, |
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139 you must use the normal function call syntax: |
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140 |
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141 x = load ("-text", "foo.dat"); |
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142 |
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143 ** Block comments. |
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144 |
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145 Commented code can be between matching "#{" and "#}" or "%{" and |
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146 "%}" markers, even if the commented code spans several line. This |
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147 allows blocks code to be commented, without needing to comment |
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148 each line. For example, |
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149 |
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150 function [s, t] = func (x, y) |
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151 s = 2 * x; |
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152 #{ |
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153 s *= y; |
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154 t = y + x; |
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155 #} |
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156 endfunction |
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157 |
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158 the lines "s *= y;" and "t = y + x" will not be executed. |
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159 |
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160 ** Special treatment in the parser of expressions like "a' * b". |
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161 |
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162 In these cases the transpose is no longer explicitly formed and |
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163 BLAS libraries are called with the transpose flagged, |
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164 significantly improving performance for these kinds of |
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165 operations. |
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166 |
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167 ** Single Precision data type. |
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168 |
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169 Octave now includes a single precision data type. Single |
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170 precision variables can be created with the "single" command, or |
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171 from functions like ones, eye, etc. For example, |
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172 |
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173 single (1) |
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174 ones (2, 2, "single") |
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175 zeros (2, 2, "single") |
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176 eye (2, 2, "single") |
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177 Inf (2, 2, "single") |
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178 NaN (2, 2, "single") |
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179 NA (2, 2, "single") |
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180 |
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181 all create single precision variables. For compatibility with |
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182 Matlab, mixed double/single precision operators and functions |
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183 return single precision types. |
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184 |
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185 As a consequence of this addition to Octave the internal |
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186 representation of the double precision NA value has changed, and |
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187 so users that make use of data generated by Octave with R or |
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188 visa-versa are warned that compatibility might not be assured. |
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189 |
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190 ** Improved array indexing. |
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191 |
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192 The underlying code used for indexing of arrays has been |
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193 completely rewritten and indexing is now significantly faster. |
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194 |
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195 ** Improved memory management. |
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196 |
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197 Octave will now attempt to share data in some cases where previously |
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198 a copy would be made, such as certain array slicing operations or |
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199 conversions between cells, structs and cs-lists. This usually reduces |
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200 both time and memory consumption. |
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201 Also, Octave will now attempt to detect and optimize usage of a vector |
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202 as a stack, when elements are being repeatedly inserted at/removed from |
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203 the end of the vector. |
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204 |
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205 ** Improved performance for reduction operations. |
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206 |
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207 The performance of the sum, prod, sumsq, cumsum, cumprod, any, all, |
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208 max and min functions has been significantly improved. |
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209 |
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210 ** Sorting and searching. |
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211 |
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212 The performance of sort has been improved, especially when sorting |
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213 indices are requested. An efficient built-in issorted implementation |
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214 was added. sortrows now uses a more efficient algorithm, especially |
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215 in the homegeneous case. lookup is now a built-in function performing |
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216 a binary search, optimized for long runs of close elements. Lookup |
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217 also works with cell arrays of strings. |
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218 |
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219 ** Range arithmetics |
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220 |
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221 For some operations on ranges, Octave will attempt to keep the result as a |
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222 range. These include negation, adding a scalar, subtracting a scalar, and |
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223 multiplying by a scalar. Ranges with zero increment are allowed and can be |
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224 constructed using the built-in function `ones'. |
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225 |
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226 ** Various performance improvements. |
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227 |
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228 Performance of a number of other built-in operations and functions was |
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229 improved, including: |
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230 |
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231 * logical operations |
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232 * comparison operators |
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233 * element-wise power |
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234 * accumarray |
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235 * cellfun |
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236 * isnan |
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237 * isinf |
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238 * isfinite |
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239 * nchoosek |
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240 * repmat |
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241 * strcmp |
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242 |
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243 ** 64-bit integer arithmetic. |
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244 |
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245 Arithmetic with 64-bit integers (int64 and uint64 types) is fully |
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246 supported, with saturation semantics like the other integer types. |
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247 Performance of most integer arithmetic operations has been |
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248 improved by using integer arithmetic directly. Previously, Octave |
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249 performed integer math with saturation semantics by converting the |
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250 operands to double precision, performing the operation, and then |
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251 converting the result back to an integer value, truncating if |
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252 necessary. |
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253 |
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254 ** Diagonal and permutation matrices. |
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255 |
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256 The interpreter can now treat diagonal and permutation matrices as |
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257 special objects that store only the non-zero elements, rather than |
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258 general full matrices. Therefore, it is now possible to construct |
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259 and use these matrices in linear algebra without suffering a |
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260 performance penalty due to storing large numbers of zero elements. |
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261 |
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262 ** Improvements to fsolve. |
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263 |
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264 The fsolve function now accepts an option structure argument (see |
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265 also the optimset function). The INFO values returned from fsolve |
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266 have changed to be compatible with Matlab's fsolve function. |
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267 Additionally, fsolve is now able to solve overdetermined systems, |
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268 complex-differentiable complex systems, systems with a sparse |
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269 jacobian and can work in single precision if given single precision |
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270 inputs. It can also be called recursively. |
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271 |
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272 ** Improvements to the norm function. |
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273 |
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274 The norm function is now able to compute row or column norms of a |
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275 matrix in a single call, as well as general matrix p-norms. |
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276 |
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277 ** New functions for computing some eigenvalues or singular values. |
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278 |
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279 The eigs and svds functions have been included in Octave. These |
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280 functions require the ARPACK library (now distributed under a |
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281 GPL-compatible license). |
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282 |
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283 ** New QR and Cholesky factorization updating functions. |
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284 |
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285 choldelete cholshift qrdelete qrshift |
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286 cholinsert cholupdate qrinsert qrupdate |
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287 |
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288 ** New quadrature functions. |
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289 |
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290 dblquad quadgk quadv triplequad |
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291 |
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292 ** New functions for reading and writing images. |
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293 |
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294 The imwrite and imread functions have been included in Octave. |
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295 These functions require the GraphicsMagick library. The new |
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296 function imfinfo provides information about an image file (size, |
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297 type, colors, etc.) |
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298 |
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299 ** The input_event_hook function has been replaced by the pair of |
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300 functions add_input_event_hook and remove_input_event_hook so that |
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301 more than one hook function may be installed at a time. |
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302 |
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303 ** Other miscellaneous new functions. |
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304 |
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305 addtodate hypot reallog |
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306 bicgstab idivide realpow |
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307 cellslices info realsqrt |
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308 cgs interp1q rectint |
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309 command_line_path isdebugmode regexptranslate |
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310 contrast isfloat restoredefaultpath |
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311 convn isstrprop roundb |
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312 cummin log1p rundemos |
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313 cummax lsqnonneg runlength |
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314 datetick matlabroot saveobj |
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315 display namelengthmax spaugment |
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316 expm1 nargoutchk strchr |
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317 filemarker pathdef strvcat |
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318 fstat perl subspace |
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319 full prctile symvar |
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320 fzero quantile treelayout |
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321 genvarname re_read_readline_init_file validatestring |
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322 histc |
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323 |
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324 ** Changes to strcat. |
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325 |
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326 The strcat function is now compatible with Matlab's strcat |
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327 function, which removes trailing whitespace when concatenating |
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328 character strings. For example |
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329 |
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330 strcat ('foo ', 'bar') |
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331 ==> 'foobar' |
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332 |
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333 The new function cstrcat provides the previous behavior of |
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334 Octave's strcat. |
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335 |
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336 ** Improvements to the help functions. |
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337 |
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338 The help system has been mostly re-implemented in .m files to make |
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339 it easier to modify. Performance of the lookfor function has been |
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340 greatly improved by caching the help text from all functions that |
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341 are distributed with Octave. The pkg function has been modified |
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342 to generate cache files for external packages when they are |
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343 installed. |
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344 |
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345 ** Deprecated functions. |
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346 |
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347 The following functions were deprecated in Octave 3.0 and will be |
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348 removed in Octave 3.4 (or whatever version is the second major |
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349 release after 3.0): |
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350 |
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351 beta_cdf geometric_pdf pascal_pdf |
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352 beta_inv geometric_rnd pascal_rnd |
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353 beta_pdf hypergeometric_cdf poisson_cdf |
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354 beta_rnd hypergeometric_inv poisson_inv |
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355 binomial_cdf hypergeometric_pdf poisson_pdf |
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356 binomial_inv hypergeometric_rnd poisson_rnd |
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357 binomial_pdf intersection polyinteg |
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358 binomial_rnd is_bool setstr |
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359 chisquare_cdf is_complex struct_contains |
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360 chisquare_inv is_list struct_elements |
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361 chisquare_pdf is_matrix t_cdf |
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362 chisquare_rnd is_scalar t_inv |
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363 clearplot is_square t_pdf |
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364 clg is_stream t_rnd |
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365 com2str is_struct uniform_cdf |
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366 exponential_cdf is_symmetric uniform_inv |
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367 exponential_inv is_vector uniform_pdf |
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368 exponential_pdf isstr uniform_rnd |
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369 exponential_rnd lognormal_cdf weibcdf |
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370 f_cdf lognormal_inv weibinv |
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371 f_inv lognormal_pdf weibpdf |
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372 f_pdf lognormal_rnd weibrnd |
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373 f_rnd meshdom weibull_cdf |
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374 gamma_cdf normal_cdf weibull_inv |
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375 gamma_inv normal_inv weibull_pdf |
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376 gamma_pdf normal_pdf weibull_rnd |
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377 gamma_rnd normal_rnd wiener_rnd |
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378 geometric_cdf pascal_cdf |
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379 geometric_inv pascal_inv |
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380 |
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381 The following functions are now deprecated in Octave 3.2 and will |
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382 be removed in Octave 3.6 (or whatever version is the second major |
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383 release after 3.2): |
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384 |
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385 create_set spcholinv spmax |
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386 dmult spcumprod spmin |
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387 iscommand spcumsum spprod |
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388 israwcommand spdet spqr |
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389 lchol spdiag spsum |
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390 loadimage spfind spsumsq |
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391 mark_as_command spinv str2mat |
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392 mark_as_rawcommand spkron unmark_command |
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393 spatan2 splchol unmark_rawcommand |
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394 spchol split |
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395 spchol2inv splu |
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396 |
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397 See NEWS.3 for old news. |
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398 </pre> |