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1 --- |
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2 layout: page |
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3 title: GNU Octave Version 3.6 |
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4 menu: false |
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5 permalink: NEWS-3.6.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 January 15, 2012 |
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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 ** The PCRE library is now required to build Octave. If a pre-compiled |
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16 package does not exist for your system, you can find PCRE sources |
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17 at http://www.pcre.org |
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18 |
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19 ** The ARPACK library is no longer distributed with Octave. |
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20 If you need the eigs or svds functions you must provide an |
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21 external ARPACK through a package manager or by compiling it |
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22 yourself. If a pre-compiled package does not exist for your system, |
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23 you can find the current ARPACK sources at |
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24 http://forge.scilab.org/index.php/p/arpack-ng |
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25 |
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26 ** Many of Octave's binary operators (.*, .^, +, -, ...) now perform |
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27 automatic broadcasting for array operations which allows you to use |
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28 operator notation instead of calling bsxfun or expanding arrays (and |
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29 unnecessarily wasting memory) with repmat or similar idioms. For |
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30 example, to scale the columns of a matrix by the elements of a row |
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31 vector, you may now write |
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32 |
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33 rv .* M |
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34 |
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35 In this expression, the number of elements of rv must match the |
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36 number of columns of M. The following operators are affected: |
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37 |
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38 plus + .+ |
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39 minus - .- |
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40 times .* |
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41 rdivide ./ |
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42 ldivide .\ |
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43 power .^ .** |
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44 lt < |
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45 le <= |
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46 eq == |
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47 gt > |
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48 ge >= |
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49 ne != ~= |
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50 and & |
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51 or | |
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52 atan2 |
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53 hypot |
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54 max |
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55 min |
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56 mod |
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57 rem |
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58 xor |
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59 |
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60 additionally, since the A op= B assignment operators are equivalent |
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61 to A = A op B, the following operators are also affected: |
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62 |
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63 += -= .+= .-= .*= ./= .\= .^= .**= &= |= |
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64 |
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65 See the "Broadcasting" section in the new "Vectorization and Faster |
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66 Code Execution" chapter of the manual for more details. |
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67 |
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68 ** Octave now features a profiler, thanks to the work of Daniel Kraft |
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69 under the Google Summer of Code mentorship program. The manual has |
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70 been updated to reflect this addition. The new user-visible |
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71 functions are profile, profshow, and profexplore. |
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72 |
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73 ** Overhaul of statistical distribution functions |
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74 |
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75 Functions now return "single" outputs for inputs of class "single". |
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76 |
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77 75% reduction in memory usage through use of logical indexing. |
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78 |
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79 Random sample functions now use the same syntax as rand and accept |
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80 a comma separated list of dimensions or a dimension vector. |
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81 |
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82 Functions have been made Matlab-compatible with regard to special |
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83 cases (probability on boundaries, probabilities for values outside |
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84 distribution, etc.). This may cause subtle changes to existing |
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85 scripts. |
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86 |
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87 negative binomial function has been extended to real, non-integer |
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88 inputs. The discrete_inv function now returns v(1) for 0 instead of |
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89 NaN. The nbincdf function has been recoded to use a closed form |
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90 solution with betainc. |
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91 |
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92 ** strread, textscan, and textread have been completely revamped. |
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93 |
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94 They now support nearly all Matlab functionality including: |
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95 |
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96 * Matlab-compatible whitespace and delimiter defaults |
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97 |
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98 * Matlab-compatible options: 'whitespace', treatasempty', format |
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99 string repeat count, user-specified comment style, uneven-length |
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100 output arrays, %n and %u conversion specifiers (provisionally) |
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101 |
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102 ** All .m string functions have been modified for better performance or |
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103 greater Matlab compatibility. Performance gains of 15X-30X have |
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104 been demonstrated. Operations on cell array of strings no longer pay |
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105 quite as high a penalty as those on 2-D character arrays. |
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106 |
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107 deblank: Now requires character or cellstr input. |
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108 |
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109 strtrim: Now requires character or cellstr input. |
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110 No longer trims nulls ("\0") from string for Matlab |
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111 compatibility. |
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112 |
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113 strmatch: Follows documentation precisely and ignores trailing spaces |
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114 in pattern and in string. Note that this is documented |
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115 Matlab behavior but the implementation apparently does |
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116 not always follow it. |
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117 |
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118 substr: Now possible to specify a negative LEN option which |
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119 extracts to within LEN of the end of the string. |
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120 |
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121 strtok: Now accepts cellstr input. |
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122 |
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123 base2dec, bin2dec, hex2dec: |
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124 Now accept cellstr inputs. |
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125 |
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126 dec2base, dec2bin, dec2hex: |
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127 Now accept cellstr inputs. |
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128 |
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129 index, rindex: |
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130 Now accept 2-D character array input. |
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131 |
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132 strsplit: Now accepts 2-D character array input. |
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133 |
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134 ** Geometry functions derived from Qhull (convhull, delaunay, voronoi) |
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135 have been revamped. The options passed to the underlying qhull |
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136 command have been changed for better results or for Matlab |
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137 compatibility. |
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138 |
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139 convhull: Default options are "Qt" for 2D, 3D, 4D inputs |
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140 Default options are "Qt Qx" for 5D and higher |
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141 |
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142 delaunay: Default options are "Qt Qbb Qc Qz" for 2D and 3D inputs |
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143 Default options are "Qt Qbb Qc Qx" for 4D and higher |
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144 |
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145 voronoi: No default arguments |
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146 |
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147 ** Date/Time functions updated. Millisecond support with FFF format |
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148 string now supported. |
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149 |
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150 datestr: Numerical formats 21, 22, 29 changed to match Matlab. |
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151 Now accepts cellstr input. |
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152 |
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153 ** The following warning IDs have been removed: |
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154 |
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155 Octave:associativity-change |
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156 Octave:complex-cmp-ops |
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157 Octave:empty-list-elements |
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158 Octave:fortran-indexing |
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159 Octave:precedence-change |
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160 |
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161 ** The warning ID Octave:string-concat has been renamed to |
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162 Octave:mixed-string-concat. |
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163 |
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164 ** Octave now includes the following Matlab-compatible preference |
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165 functions: |
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166 |
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167 addpref getpref ispref rmpref setpref |
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168 |
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169 ** The following Matlab-compatible handle graphics functions have been |
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170 added: |
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171 |
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172 guidata uipanel uitoolbar |
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173 guihandles uipushtool uiwait |
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174 uicontextmenu uiresume waitfor |
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175 uicontrol uitoggletool |
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176 |
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177 The uiXXX functions above are experimental. |
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178 |
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179 Except for uiwait and uiresume, the uiXXX functions are not |
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180 supported with the FLTK+OpenGL graphics toolkit. |
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181 |
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182 The gnuplot graphics toolkit does not support any of the uiXXX |
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183 functions nor the waitfor function. |
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184 |
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185 ** New keyword parfor (parallel for loop) is now recognized as a valid |
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186 keyword. Implementation, however, is still mapped to an ordinary |
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187 for loop. |
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188 |
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189 ** Other new functions added in 3.6.0: |
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190 |
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191 bicg nthargout usejava |
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192 is_dq_string narginchk waitbar |
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193 is_sq_string python zscore |
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194 is_function_handle register_graphics_toolkit |
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195 loaded_graphics_toolkits recycle |
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196 |
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197 ** Deprecated functions. |
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198 |
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199 The following functions were deprecated in Octave 3.2 and have been |
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200 removed from Octave 3.6. |
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201 |
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202 create_set spcholinv splu |
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203 dmult spcumprod spmax |
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204 iscommand spcumsum spmin |
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205 israwcommand spdet spprod |
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206 lchol spdiag spqr |
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207 loadimage spfind spsum |
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208 mark_as_command sphcat spsumsq |
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209 mark_as_rawcommand spinv spvcat |
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210 spatan2 spkron str2mat |
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211 spchol splchol unmark_command |
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212 spchol2inv split unmark_rawcommand |
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213 |
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214 The following functions have been deprecated in Octave 3.6 and will |
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215 be removed from Octave 3.10 (or whatever version is the second major |
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216 release after 3.6): |
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217 |
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218 cut is_duplicate_entry |
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219 cor polyderiv |
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220 corrcoef shell_cmd |
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221 __error_text__ studentize |
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222 error_text sylvester_matrix |
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223 </pre> |
