Mercurial > octave
annotate NEWS @ 20949:e456327188f9
* cdisplay.c: Additional programming notes.
author | John W. Eaton <jwe@octave.org> |
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date | Sat, 19 Dec 2015 09:15:23 -0500 |
parents | 58263bea2fdf |
children | f7e64e1baa08 |
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1 Summary of important user-visible changes for version 4.2: |
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2 --------------------------------------------------------- |
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3 |
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4 ** The parser has been extended to accept, but ignore, underscore characters |
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5 in numbers. This facilitates writing more legible code by using '_' as |
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6 a thousands separator or to group nibbles into bytes in hex constants. |
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7 |
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8 Examples: 1_000_000 == 1e6 or 0xDE_AD_BE_EF |
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9 |
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10 ** The parser has been extended to understand binary numbers which begin |
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11 with the prefix '0b' or '0B'. The value returned is Octave's default |
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12 numeric class of double, not at unsigned integer class. Therefore numbers |
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13 greater than flintmax, i.e., 2^53, will lose some precision. |
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14 |
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15 Examples: 0b101 == 5 or 0B1100_0001 == 0xC1 |
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16 |
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17 ** The default colormap is now set to "viridis" which is also the default |
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18 colormap in matplotlib. This new colormap fixes some of the main issues |
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19 with the old default colormap "jet" such as its bad "luminance profile" |
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20 and is also more similar to Matlab's new default colormap "parula". |
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21 |
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22 ** Octal ('\NNN') and hex ('\xNN') escape sequences in single quoted |
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23 strings are now interpreted by the function do_string_escapes(). |
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24 The *printf family of functions now supports octal and hex escape |
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25 sequences in single-quoted strings for Matlab compatibility. |
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26 |
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27 ** Special octal and hex escape sequences for the pattern and replacement |
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28 strings in regular expressions are now interpreted for Matlab compatibility. |
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29 |
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30 octal: '\oNNN' or '\o{NNN}' |
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31 hex : '\xNN' or '\x{NN}' |
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32 |
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33 ** Unknown escape sequences in the replacement string for regexprep are now |
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34 substituted with their unescaped version and no warning is emitted. |
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35 This change was made for Matlab compatibility. |
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36 |
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37 Example: regexprep ('a', 'a', 'x\yz') |
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38 => 'xyz' |
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39 |
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40 ** mkfifo now interprets the MODE argument as an octal, not decimal, integer. |
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41 This is consistent with the equivalent shell command. |
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42 |
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43 ** linspace now returns an empty matrix if the number of requested points |
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44 is 0 or a negative number. This change was made to be compatible with |
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45 Matlab releases newer than 2011. In addition, Octave no longer supports |
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46 matrix inputs for A or B. |
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47 |
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48 ** The griddata function no longer plots the interpolated mesh if no output |
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49 argument is requested, instead the vector or array of interpolated values |
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50 is always returned for Matlab compatibility. |
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51 |
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52 ** The surfnorm function now returns unnormalized (magnitude != 1) normal |
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53 vectors for compatibility with Matlab. |
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54 |
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55 ** The quadl function now uses an absolute, rather than relative, tolerance |
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56 for Matlab compatibility. The default tolerance is 1e-6 which may result |
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57 in lower precision results than previous versions of Octave which used |
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58 eps as the relative tolerance. The quadl function has also been extended |
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59 to return a second output with the total number of function evaluations. |
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60 |
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61 ** Other new functions added in 4.2: |
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62 |
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63 deg2rad |
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64 hash |
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65 im2double |
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66 psi |
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67 odeset |
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68 odeget |
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69 ode45 |
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70 rad2deg |
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71 |
20484 | 72 ** Deprecated functions. |
73 | |
74 The following functions have been deprecated in Octave 4.2 and will | |
75 be removed from Octave 4.6 (or whatever version is the second major | |
76 release after 4.2): | |
77 | |
78 Function | Replacement | |
79 ---------------------|------------------ | |
20486 | 80 bitmax | flintmax |
20502 | 81 mahalanobis | mahal in Octave-Forge statistics pkg |
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82 md5sum | hash |
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Unified "sleep" functions to "octave_sleep" in C++ and "pause" in Octave.
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83 sleep | pause |
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84 usleep | pause |
20484 | 85 wavread | audioread |
86 wavwrite | audiowrite | |
87 | |
88 ** The following functions were deprecated in Octave 3.8 and have been | |
89 removed from Octave 4.2. | |
90 | |
91 default_save_options java_new | |
92 gen_doc_cache java_unsigned_conversion | |
93 interp1q javafields | |
94 isequalwithequalnans javamethods | |
95 java_convert_matrix re_read_readline_init_file | |
96 java_debug read_readline_init_file | |
97 java_invoke saving_history | |
98 | |
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99 ** The global error_state variable in Octave's C++ API has been |
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100 deprecated and will be removed in a future version. Now the error |
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101 and print_usage functions throw an exception |
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102 (octave_execution_exception) after displaying the error message. |
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103 This makes the error and print_usage functions in C++ work more like |
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104 the corresponding functions in the scripting language. |
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105 |
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106 ** New configure option, --enable-address-sanitizer-flags, to build |
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107 Octave with memory allocator checks (similar to those provided by |
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108 valgrind) built in. |
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109 |
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110 Summary of important user-visible changes for version 4.0: |
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111 --------------------------------------------------------- |
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112 |
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113 ** A graphical user interface is now the default when running Octave |
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114 interactively. The start-up option --no-gui will run the familiar |
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115 command line interface, and still allows use of the GUI dialogs and |
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116 qt plotting toolkit. The option --no-gui-libs runs a minimalist |
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117 command line interface that does not link with the Qt libraries and |
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118 uses the fltk toolkit for plotting. |
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119 |
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120 ** Octave now uses OpenGL graphics with Qt widgets by default. If OpenGL |
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121 libraries are not available when Octave is built, gnuplot is used. |
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122 You may choose to use the fltk or gnuplot toolkit for graphics by |
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123 executing the command |
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124 |
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125 graphics_toolkit ("fltk") |
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126 OR |
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127 graphics_toolkit ("gnuplot") |
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128 |
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129 Adding such a command to your ~/.octaverc file will set the default |
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130 for each session. |
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131 |
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132 ** A new syntax for object oriented programming termed classdef has been |
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133 introduced. See the manual for more extensive documentation of the |
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134 classdef interface. |
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136 New keywords: |
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137 |
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138 classdef endclassdef |
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139 enumeration endenumeration |
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140 events endevents |
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141 methods endmethods |
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142 properties endproperties |
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143 |
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144 ** New audio functions and classes: |
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145 |
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146 audiodevinfo audioread sound |
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147 audioinfo audiorecorder soundsc |
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148 audioplayer audiowrite |
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149 |
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150 ** Other new classes in Octave 4.0: |
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151 |
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152 audioplayer inputParser |
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153 audiorecorder |
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154 |
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155 ** Optional stricter Matlab compatibility for ranges, diagonal matrices, |
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156 and permutation matrices. |
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157 |
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158 Octave has internal optimizations which use space-efficient storage |
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159 for the three data types above. Three new functions have been added |
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160 which control whether the optimizations are used (default), or whether |
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161 the data types are stored as full matrices. |
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162 |
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163 disable_range disable_diagonal_matrix disable_permutation_matrix |
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164 |
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165 All three optimizations are disabled if Octave is started with the |
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166 --braindead command line option. |
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167 |
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168 ** The preference |
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169 |
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170 do_braindead_shortcircuit_evaluation |
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171 |
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172 is now enabled by default. |
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173 |
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174 ** The preference |
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175 |
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176 allow_noninteger_range_as_index |
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177 |
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178 is now enabled by default and the warning ID |
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179 |
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180 Octave:noninteger-range-as-index |
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181 |
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182 is now set to "on" by default instead of "error" by default and "on" |
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183 for --traditional. |
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184 |
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185 ** The "backtrace" warning option is now enabled by default. This change |
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186 was made for Matlab compatibility. |
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187 |
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188 ** For compatibility with Matlab, the "ismatrix (x)" function now only checks |
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189 the dimension of "x". The old behaviour of "ismatrix" is obtained by |
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190 "isnumeric (x) || islogical (x) || ischar (x)". |
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191 |
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192 ** The nextpow2 function behaviour has been changed for vector inputs. |
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193 Instead of computing `nextpow2 (length (x))', it will now compute |
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194 nextpow2 for each element of the input. This change is Matlab compatible, |
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195 and also prevents bugs for "vectors" of length 1. |
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196 |
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197 ** polyeig now returns a row vector of eigenvalues rather than a matrix |
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198 with the eigenvalues on the diagonal. This change was made for Matlab |
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199 compatibility. |
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200 |
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201 ** Interpolation function changes for Matlab compatibility |
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202 |
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203 The interpolation method 'cubic' is now equivalent to 'pchip' |
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204 for interp1, interp2, and interp3. Previously, 'cubic' was equivalent |
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205 to 'spline' for interp2. This may produce different results as 'spline' |
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206 has continuous 1st and 2nd derivatives while 'pchip' only has a continuous |
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207 1st derivative. The methods 'next' and 'previous' have been added to |
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208 interp1 for compatibility. |
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209 |
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210 ** The delaunay function has been extended to accept 3-D inputs for |
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211 Matlab compatibility. The delaunay function no longer plots the |
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212 triangulation if no output argument is requested, instead, the |
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213 triangulation is always returned. The delaunay3 function which |
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214 handles 3-D inputs has been deprecated in favor of delaunay. |
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215 |
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216 ** The trigonometric functions asin and acos return different phase values |
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217 from previous versions of Octave when the input is outside the principal |
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218 branch ([-1, 1]). If the real portion of the input is greater than 1 then |
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219 the limit from below is taken. If the real portion is less than 1 then the |
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220 limit from above is taken. This criteria is consistent with several other |
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221 numerical analysis software packages. |
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222 |
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223 ** The hyperbolic function acosh now returns values with a phase in the range |
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224 [-pi/2, +pi/2]. Previously Octave returned values in the range [0, pi]. |
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225 This is consistent with several other numerical analysis software packages. |
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226 |
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227 ** strfind changes when using empty pattern ("") for Matlab compatibility |
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228 |
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229 strfind now returns an empty array when the pattern itself is empty. |
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230 In previous versions of Octave, strfind matched at every character |
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231 location when the pattern was empty. |
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232 |
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233 NEW |
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234 strfind ("abc", "") => [] |
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235 OLD |
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236 strfind ("abc", "") => [1, 2, 3, 4] |
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237 |
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238 ** Integer formats used in the printf family of functions now work for |
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239 64-bit integers and are more compatible with Matlab when printing |
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240 non-integer values. Now instead of truncating, Octave will switch |
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241 the effective format to '%g' in the following circumstances: |
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242 |
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243 * the value of an integer type (int8, uint32, etc.) value exceeds |
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244 the maximum for the format specifier. For '%d', the limit is |
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245 intmax ('int64') and for '%u' it is intmax ('uint64'). |
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246 |
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247 * round(x) != x or the value is outside the range allowed by the |
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248 integer format specifier. |
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249 |
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250 There is still one difference: Matlab switches to '%e' and Octave |
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251 switches to '%g'. |
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252 |
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253 ** The functions intersect, setdiff, setxor, and union now return a |
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254 column vector as output unless the input was a row vector. This change |
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255 was made for Matlab compatibility. |
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256 |
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257 ** The inpolygon function now returns true for points that are within |
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258 the polygon OR on it's edge. This change was made for Matlab |
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259 compatibility. |
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260 |
19258
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261 ** The archive family of functions (bzip2, gzip, zip, tar) and their |
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262 unpacking routines (bunzip2, gunzip, unzip, untar, unpack) have |
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263 been recoded. Excepting unpack, the default is now to place files |
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264 in the same directory as the archive (on unpack) or as the original |
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265 files (on archiving). |
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266 |
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267 ** Qt and FLTK graphics toolkits now support offscreen rendering on Linux. |
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268 In other words, print will work even when the figure visibility is "off". |
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269 |
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270 ** Z-order stacking issues with patches, grid lines, and line object |
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271 plot markers for on screen display and printing have all been resolved. |
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272 For 2-D plots the axis grid lines can be placed on top of the plot |
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273 with set (gca, "layer", "top"). |
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274 |
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275 ** The patch graphic object has been overhauled. It now produces visual |
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276 results equivalent to Matlab even for esoteric combinations of |
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277 faces/vertices/cdata. |
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278 |
19081 | 279 ** The polar() plot function now draws a circular theta axis and |
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280 radial rho axis rather than using a rectangular x/y axis. |
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281 |
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282 ** linkprop has been completely re-coded for performance and Matlab |
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283 compatibility. It now returns a linkprop object which must be stored |
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284 in a variable for as long as the graphic objects should remain linked. |
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285 To unlink properties use 'clear hlink' where hlink is the variable |
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286 containing the linkprop object. |
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287 |
19051
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288 ** isprime has been extended to operate on negative and complex inputs. |
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289 |
19189
d70b1cec7743
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290 ** xor has been extended to accept more than two arguments in which case |
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291 it performs cumulative XOR reduction. |
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292 |
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293 ** The following functions now support N-dimensional arrays: |
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294 |
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rectint: fix for non-overlapping rectangle, and support ND boxes (bug #44904)
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|
295 fliplr flipud rot90 rectint |
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|
296 |
19030
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|
297 ** The new warning ID "Octave:data-file-in-path" replaces the three |
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298 previous separate warning IDs "Octave:fopen-file-in-path", |
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299 "Octave:load-file-in-path", and "Octave:md5sum-file-in-path". |
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300 |
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301 ** The warning ID Octave:singular-matrix-div has been replaced by |
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302 Octave:nearly-singular-matrix and Octave:singular-matrix. |
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303 |
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304 ** The warning ID Octave:matlab-incompatible has been replaced by |
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305 Octave:language-extension to better reflect its meaning. |
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306 |
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307 ** The warning ID Octave:broadcast has been removed. Instead automatic |
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308 broadcasting will throw an Octave:language-extension warning. This |
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309 warning ID is used for broadcasting as well as other features not |
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310 available in Matlab. |
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311 |
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312 ** Other new functions added in 4.0: |
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|
313 |
19741
b8e4104a8f55
Add the annotation function (bug #43282)
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|
314 annotation |
19081 | 315 bandwidth |
19530
5ab6fcf32d1e
New function for colormap cubehelix.
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|
316 cubehelix |
19081 | 317 dir_in_loadpath |
19126
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Flip arrays - ND support for fliplr and flipud, and replace flipdim with flip.
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|
318 flip |
19313
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|
319 frame2im |
20024
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Document get_home_directory in Octave manual and NEWS file.
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|
320 get_home_directory |
19081 | 321 hgload |
322 hgsave | |
323 ichol | |
324 ilu | |
19313
39a69f54417e
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19294
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|
325 im2frame |
19081 | 326 isbanded |
327 isdiag | |
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328 isstudent |
19081 | 329 istril |
330 istriu | |
331 javachk | |
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332 jit_failcnt |
19081 | 333 linkaxes |
334 lscov | |
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335 metaclass |
19081 | 336 numfields |
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|
337 open |
19747
56157a7505ed
Add new ordschur function.
Sébastien Villemot <sebastien@debian.org>
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|
338 ordschur |
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339 pan |
19354
cc6000ccd627
New function qmr (patch #8569).
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19313
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|
340 qmr |
19081 | 341 rotate |
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|
342 rotate3d |
19081 | 343 sylvester |
19167
6f0290863d50
Add new function unsetenv from gnulib to Octave.
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|
344 unsetenv |
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345 validateattributes |
19089 | 346 zoom |
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347 |
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|
348 ** inline() scheduled for eventual deprecation by Matlab |
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349 |
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350 Functions created through the use of inline are scheduled for deprecation |
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351 by Matlab. When this occurs Octave will continue to support inline |
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|
352 functions for an indeterminate amount of time before also removing support. |
19597
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|
353 All new code should use anonymous functions in place of inline functions. |
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354 |
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355 ** Deprecated functions. |
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356 |
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357 The following functions have been deprecated in Octave 4.0 and will |
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358 be removed from Octave 4.4 (or whatever version is the second major |
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359 release after 4.0): |
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360 |
19268 | 361 Function | Replacement |
362 ---------------------|------------------ | |
363 bicubic | interp2 | |
364 delaunay3 | delaunay | |
365 dump_prefs | individual preference get/set routines | |
366 find_dir_in_path | dir_in_loadpath | |
367 finite | isfinite | |
368 fmod | rem | |
369 fnmatch | glob or regexp | |
20500
caa5de39147e
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370 gmap40 | ---- |
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371 loadaudio | audioread |
19268 | 372 luinc | ilu or ichol |
19760
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bring back mouse_wheel_zoom function as deprecated
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373 mouse_wheel_zoom | mousewheelzoom axes property |
19268 | 374 nfields | numfields |
375 octave_tmp_file_name | tempname | |
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376 playaudio | audioplayer |
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377 saveaudio | audiowrite |
19268 | 378 syl | sylvester |
379 usage | print_usage | |
18538
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380 |
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381 allow_noninteger_range_as_index |
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382 do_braindead_shortcircuit_evaluation |
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383 setaudio |
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384 |
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385 ** The following functions were deprecated in Octave 3.8 and will be |
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386 removed from Octave 4.2 (or whatever version is the second major |
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387 release after 3.8): |
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|
388 |
19081 | 389 default_save_options java_new |
390 gen_doc_cache java_unsigned_conversion | |
391 interp1q javafields | |
392 isequalwithequalnans javamethods | |
18911 | 393 java_convert_matrix re_read_readline_init_file |
19081 | 394 java_debug read_readline_init_file |
395 java_invoke saving_history | |
396 | |
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397 ** The following functions were deprecated in Octave 3.6 and have been |
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398 removed from Octave 4.0. |
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399 |
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400 cut polyderiv |
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401 cor shell_cmd |
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402 corrcoef studentize |
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403 __error_text__ sylvester_matrix |
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404 error_text |
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405 |
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406 ** The following keywords were deprecated in Octave 3.8 and have been |
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407 removed from Octave 4.0 |
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408 |
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409 static |
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410 |
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411 ** The following configuration variables were deprecated in Octave 3.8 |
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412 and have been removed from Octave 4.0 |
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413 |
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414 CC_VERSION (now GCC_VERSION) |
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415 CXX_VERSION (now GXX_VERSION) |
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416 |
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417 ** The internal function atan2 of the sparse matrix class has been deprecated |
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418 in Octave 4.0 and will be removed from Octave 4.4 (or whatever version is |
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419 the second major release after 4.0). Use the Fatan2 function with sparse |
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420 inputs as a replacement. |
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421 |
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422 ** The internal class Octave_map was deprecated in Octave 3.8 and has |
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423 been removed from Octave 4.0. Replacement classes are |
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424 octave_map (struct array) or octave_scalar_map for a single structure. |
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425 |
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426 ** The configure option --enable-octave-allocator has been removed. |
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427 The internal class octave_allocator declared in oct-alloc.h has |
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428 been removed. The header remains, but is deprecated. The macros to |
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429 access the class (DECLARE_OCTAVE_ALLOCATOR, DEFINE_OCTAVE_ALLOCATOR, |
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430 and DEFINE_OCTAVE_ALLOCATOR2) are now unconditionally defined to be |
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431 empty. |
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432 |
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433 ** Octave now has OpenMP enabled by default if the system provides a |
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434 working OpenMP implementation. This allows oct-file modules to take |
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435 advantage of OpenMP if desired. This can be disabled when building |
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436 Octave with the configure option --disable-openmp. |
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437 |
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438 ** Octave now automatically truncates intermediate calculations done with |
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439 floating point values to 64 bits. Some hardware math co-processors, such |
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440 as the x87, maintain extra precision, but this leads to disagreements in |
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441 calculations when compared to reference implementations in software using |
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442 the IEEE standard for double precision. There was no measurable |
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443 performance impact to this change, but it may be disabled with the |
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444 configure option --disable-float-truncate. MinGW and Cygwin platforms, |
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445 as well as GCC compilers >= 5.0 require this feature. Non-x87 hardware, |
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446 or hardware using SSE options exclusively, can disable float truncation |
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447 if desired. |
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448 |
9352 | 449 --------------------------------------------------------- |
450 | |
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451 See NEWS.3 for old news. |