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Announce OctConf 2018 with alert-box. * _includes/header.html: Add a closeable banner to each page. * _includes/head.html: Include foundation.alert.js.
author Kai T. Ohlhus <k.ohlhus@gmail.com>
date Mon, 22 Jan 2018 23:44:32 +0100
parents e8fc61e077fc
children
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94
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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>