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author Kai T. Ohlhus <k.ohlhus@gmail.com>
date Thu, 13 Oct 2016 17:41:24 +0200
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1 <pre>
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2 Summary of important user-visible changes for version 3.6:
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3 ---------------------------------------------------------
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4
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5 ** The PCRE library is now required to build Octave. If a pre-compiled
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6 package does not exist for your system, you can find PCRE sources
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7 at http://www.pcre.org
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8
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9 ** The ARPACK library is no longer distributed with Octave.
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10 If you need the eigs or svds functions you must provide an
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11 external ARPACK through a package manager or by compiling it
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12 yourself. If a pre-compiled package does not exist for your system,
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13 you can find the current ARPACK sources at
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14 http://forge.scilab.org/index.php/p/arpack-ng
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15
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16 ** Many of Octave's binary operators (.*, .^, +, -, ...) now perform
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17 automatic broadcasting for array operations which allows you to use
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18 operator notation instead of calling bsxfun or expanding arrays (and
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19 unnecessarily wasting memory) with repmat or similar idioms. For
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20 example, to scale the columns of a matrix by the elements of a row
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21 vector, you may now write
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22
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23 rv .* M
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24
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25 In this expression, the number of elements of rv must match the
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26 number of columns of M. The following operators are affected:
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27
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28 plus + .+
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29 minus - .-
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30 times .*
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31 rdivide ./
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32 ldivide .\
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33 power .^ .**
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34 lt <
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35 le <=
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36 eq ==
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37 gt >
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38 ge >=
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39 ne != ~=
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40 and &
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41 or |
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42 atan2
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43 hypot
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44 max
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45 min
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46 mod
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47 rem
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48 xor
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49
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50 additionally, since the A op= B assignment operators are equivalent
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51 to A = A op B, the following operators are also affected:
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52
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53 += -= .+= .-= .*= ./= .\= .^= .**= &= |=
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54
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55 See the "Broadcasting" section in the new "Vectorization and Faster
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56 Code Execution" chapter of the manual for more details.
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57
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58 ** Octave now features a profiler, thanks to the work of Daniel Kraft
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59 under the Google Summer of Code mentorship program. The manual has
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60 been updated to reflect this addition. The new user-visible
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61 functions are profile, profshow, and profexplore.
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62
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63 ** Overhaul of statistical distribution functions
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64
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65 Functions now return "single" outputs for inputs of class "single".
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66
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67 75% reduction in memory usage through use of logical indexing.
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68
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69 Random sample functions now use the same syntax as rand and accept
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70 a comma separated list of dimensions or a dimension vector.
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71
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72 Functions have been made Matlab-compatible with regard to special
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73 cases (probability on boundaries, probabilities for values outside
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74 distribution, etc.). This may cause subtle changes to existing
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75 scripts.
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76
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77 negative binomial function has been extended to real, non-integer
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78 inputs. The discrete_inv function now returns v(1) for 0 instead of
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79 NaN. The nbincdf function has been recoded to use a closed form
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80 solution with betainc.
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81
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82 ** strread, textscan, and textread have been completely revamped.
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83
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84 They now support nearly all Matlab functionality including:
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85
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86 * Matlab-compatible whitespace and delimiter defaults
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87
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88 * Matlab-compatible options: 'whitespace', treatasempty', format
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89 string repeat count, user-specified comment style, uneven-length
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90 output arrays, %n and %u conversion specifiers (provisionally)
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91
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92 ** All .m string functions have been modified for better performance or
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93 greater Matlab compatibility. Performance gains of 15X-30X have
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94 been demonstrated. Operations on cell array of strings no longer pay
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95 quite as high a penalty as those on 2-D character arrays.
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96
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97 deblank: Now requires character or cellstr input.
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98
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99 strtrim: Now requires character or cellstr input.
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100 No longer trims nulls ("\0") from string for Matlab
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101 compatibility.
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102
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103 strmatch: Follows documentation precisely and ignores trailing spaces
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104 in pattern and in string. Note that this is documented
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105 Matlab behavior but the implementation apparently does
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106 not always follow it.
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107
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108 substr: Now possible to specify a negative LEN option which
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109 extracts to within LEN of the end of the string.
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110
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111 strtok: Now accepts cellstr input.
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112
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113 base2dec, bin2dec, hex2dec:
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114 Now accept cellstr inputs.
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115
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116 dec2base, dec2bin, dec2hex:
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117 Now accept cellstr inputs.
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118
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119 index, rindex:
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120 Now accept 2-D character array input.
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121
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122 strsplit: Now accepts 2-D character array input.
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123
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124 ** Geometry functions derived from Qhull (convhull, delaunay, voronoi)
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125 have been revamped. The options passed to the underlying qhull
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126 command have been changed for better results or for Matlab
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127 compatibility.
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128
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129 convhull: Default options are "Qt" for 2D, 3D, 4D inputs
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130 Default options are "Qt Qx" for 5D and higher
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131
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132 delaunay: Default options are "Qt Qbb Qc Qz" for 2D and 3D inputs
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133 Default options are "Qt Qbb Qc Qx" for 4D and higher
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134
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135 voronoi: No default arguments
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136
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137 ** Date/Time functions updated. Millisecond support with FFF format
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138 string now supported.
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139
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140 datestr: Numerical formats 21, 22, 29 changed to match Matlab.
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141 Now accepts cellstr input.
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142
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143 ** The following warning IDs have been removed:
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144
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145 Octave:associativity-change
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146 Octave:complex-cmp-ops
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147 Octave:empty-list-elements
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148 Octave:fortran-indexing
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149 Octave:precedence-change
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150
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151 ** The warning ID Octave:string-concat has been renamed to
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152 Octave:mixed-string-concat.
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153
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154 ** Octave now includes the following Matlab-compatible preference
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155 functions:
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156
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157 addpref getpref ispref rmpref setpref
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158
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159 ** The following Matlab-compatible handle graphics functions have been
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160 added:
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161
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162 guidata uipanel uitoolbar
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163 guihandles uipushtool uiwait
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164 uicontextmenu uiresume waitfor
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165 uicontrol uitoggletool
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166
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167 The uiXXX functions above are experimental.
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168
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169 Except for uiwait and uiresume, the uiXXX functions are not
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170 supported with the FLTK+OpenGL graphics toolkit.
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171
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172 The gnuplot graphics toolkit does not support any of the uiXXX
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173 functions nor the waitfor function.
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174
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175 ** New keyword parfor (parallel for loop) is now recognized as a valid
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176 keyword. Implementation, however, is still mapped to an ordinary
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177 for loop.
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178
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179 ** Other new functions added in 3.6.0:
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180
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181 bicg nthargout usejava
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182 is_dq_string narginchk waitbar
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183 is_sq_string python zscore
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184 is_function_handle register_graphics_toolkit
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185 loaded_graphics_toolkits recycle
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186
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187 ** Deprecated functions.
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188
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189 The following functions were deprecated in Octave 3.2 and have been
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190 removed from Octave 3.6.
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191
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192 create_set spcholinv splu
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193 dmult spcumprod spmax
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194 iscommand spcumsum spmin
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195 israwcommand spdet spprod
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196 lchol spdiag spqr
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197 loadimage spfind spsum
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198 mark_as_command sphcat spsumsq
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199 mark_as_rawcommand spinv spvcat
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200 spatan2 spkron str2mat
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201 spchol splchol unmark_command
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202 spchol2inv split unmark_rawcommand
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203
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204 The following functions have been deprecated in Octave 3.6 and will
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205 be removed from Octave 3.10 (or whatever version is the second major
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206 release after 3.6):
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207
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208 cut is_duplicate_entry
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209 cor polyderiv
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210 corrcoef shell_cmd
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211 __error_text__ studentize
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212 error_text sylvester_matrix
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213 </pre>