Mercurial > jwe > octave
annotate NEWS @ 29921:0bf14f708dc6
NEWS: more notes about changes to mldivide.
* NEWS: more notes about changes to mldivide.
author | Rik <rik@octave.org> |
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date | Fri, 23 Jul 2021 14:18:00 -0700 |
parents | daf351544539 |
children | b436a01d186d |
rev | line source |
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NEWS: Update for version 7 development.
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1 Summary of important user-visible changes for version 7 (yyyy-mm-dd): |
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2 ---------------------------------------------------------------------- |
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Major version and date update for Octave 5.2.0 (bug #57657).
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3 |
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4 ### General improvements |
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5 |
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6 - Many functions in Octave can be called in a command form---no |
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7 parentheses for invocation and no return argument assignment---or in a |
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8 functional form---parentheses and '=' for assignment of return values. |
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9 |
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10 **Command Form Example** |
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12 `mkdir new_directory` |
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14 **Function Form Example** |
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15 |
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16 `status = mkdir ("new_directory")` |
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17 |
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18 Octave now handles errors that occur in a consistent manner. If |
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19 called in command form and there is a failure, an error is thrown |
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20 and a message printed. If called in functional form, no error or |
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21 message is printed and the failure is communicated to the programmer |
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22 via the output status variable. |
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23 |
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24 The following list of functions have been modified. |
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25 |
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26 * `copyfile` |
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27 * `fcntl` |
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28 * `fileattrib` |
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29 * `kill` |
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30 * `link` |
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31 * `mkfifo` |
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32 * `movefile` |
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33 * `rename` |
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34 * `rmdir` |
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35 * `symlink` |
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36 * `unlink` |
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37 |
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NEW: Note changes in checking the number of function inputs and outputs.
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38 - Calling a user-defined function with too many inputs or outputs is now |
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39 an error. The interpreter makes this check automatically. If a |
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40 function uses varargin then the check is skipped for function inputs, |
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41 and if a function uses varargout then the check is skipped for function |
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42 outputs. Input validation for functions typically begins with checking |
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43 that the number of inputs and outputs match expectations. Existing code |
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44 can be simplified by removing these checks which are now done by the |
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45 interpreter. Typically, code blocks like the following can simply be |
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46 deleted. |
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47 |
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48 ## Checking number of inputs |
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49 if (nargin > 2) |
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50 print_usage (); |
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51 endif |
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52 |
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53 ## Checking number of outputs |
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54 if (nargout > 1) |
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55 print_usage (); |
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56 endif |
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57 |
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58 - Binary and hexadecimal constants like `0b101` and `0xDEADBEEF` now |
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59 create integers (unsigned by default) with sizes determined from the |
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60 number of digits present. For example, `0xff` creates a `uint8` value |
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61 and `0xDEADBEEF` creates a `uint64` value. You may also use a suffix of |
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62 the form `u8`, `u16`, `u32`, `u64`, `s8`, `s16`, `s32`, or `s64` to |
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63 explicitly specify the data type to use (`u` or `s` to indicate unsigned |
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64 or signed and the number to indicate the integer size). |
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65 |
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66 Binary constants are limited to 64 binary digits and hexadecimal |
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67 constants are limited to 16 hexadecimal digits with no automatic |
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68 rounding or conversion to floating point values. Note that this may |
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69 cause problems in existing code. For example, an expression like |
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70 `[0x1; 0x100; 0x10000]` will be uint8 (because of the rules of |
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71 concatenating integers of different sizes) with the larger values |
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72 truncated (because of the saturation semantics of integer values). To |
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73 avoid these kinds of problems either: 1) declare the first integer to be |
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74 of the desired size such as `[0x1u32; 0x100; 0x10000]`, or 2) pad |
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75 constants in array expressions with leading zeros so that they use the |
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76 same number of digits for each value such as |
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77 `[0x00_00_01; 0x00_01_00; 0x01_00_00]`. |
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78 |
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79 - The `mldivide` function (i.e., the `\` operator) now uses an LU |
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80 decomposition to solve nearly singular full square matrices. This is |
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81 Matlab-compatible and yields results which more nearly minimize `norm |
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82 (A*x - b)`. Previously, Octave computed a minimum-norm solution. |
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83 |
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84 - The `whos` function now displays an additional attribute 's' when |
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85 the variable is a sparse type. |
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86 |
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87 - As part of GSoC 2020, Abdallah K. Elshamy implemented the |
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New functions jsondecode and jsonencode (bug #53100).
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88 `jsondecode` and `jsonencode` functions to read and write JSON data. |
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89 |
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90 - By default, the history file is now located at $DATA/octave/history, |
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91 where $DATA is a platform dependent location for (roaming) user data |
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92 files (e.g., ${XDG_DATA_HOME} or, if that is not set, ~/.local/share on |
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93 Unix-like operating systems or %APPDATA% on Windows). |
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94 |
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95 - For Octave on Windows OS, the minimum required version of the Windows |
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96 API is now 6.1 (Windows 7 or newer). |
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97 |
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98 - The non-re-entrant version of the QHull library "libqhull" was |
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99 deprecated upstream. Octave now (optionally) requires the re-entrant |
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100 version of that library "libqhull_r" instead. |
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101 |
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102 ### Graphical User Interface |
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103 |
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104 - Turkish translation added. |
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106 - In debug mode, symbol values are now shown in tooltips when hovering |
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107 variables in the editor panel. |
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108 |
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109 ### Graphics backend |
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110 |
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111 - Support for Qt4 for both graphics and the GUI has been removed. |
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112 |
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Initial implementation of a LaTeX interpreter (bug #59546).
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113 - If a working LaTeX tool chain is found on the path, including `latex`, |
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114 `dvipng`, and `dvisvgm` binaries, then text strings can now be rendered |
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115 properly when using the `"latex"` value for the text objects' |
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116 `"interpreter"` property and axes objects' `"ticklabelinterpreter"`. |
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117 Type `doc "latex interpreter"` for further info. |
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118 |
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119 - The `FMT` format argument for plot commands now accepts long forms for |
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120 color names which may be more understandable than the existing |
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121 one-letter codes. For example, the RGB value `[0 0 0]` can now be |
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122 specified by `"black"` in addition to `"k"`. |
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123 |
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124 - The color graphics properties, for example `"EdgeColor"` or |
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125 `"FaceColor"`, now accept HTML specifications. An HTML specification is |
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126 a string that begins with the character '#' and is followed by either 3 |
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127 or 6 hexadecimal digits. For example, magenta which is 100% red and |
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128 blue values can specified by `"#FF00FF"` or `"#F0F"`. |
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129 |
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130 - The additional property `"contextmenu"` has been added to all graphics |
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131 objects. It is equivalent to the previously used `"uicontextmenu"` |
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132 property which is hidden now. |
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133 |
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134 - `uicontrol` objects now fully implement the `"Off"` and `"Inactive"` |
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135 values of the `"Enable"` property. When the value is `"Off"`, no |
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136 interaction with the object occurs and the `uicontrol` changes color |
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137 (typically to gray) to indicate it is disabled. When the value is |
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138 `"Inactive"`, the object appears normally (no change in color), but it |
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139 is not possible to change the value of the object (such as modifying |
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140 text in an `Edit` box or clicking on a `RadioButton`). |
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141 |
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142 - The `"ListBoxTop"` property for `uicontrol` objects has been |
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143 implemented for `set` commands. |
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144 |
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145 - Additional properties have been added to the `axes` graphics object: |
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146 * `"alphamap"` (not yet implemented) |
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147 * `"alphascale"` (not yet implemented) |
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148 * `"colorscale"` (not yet implemented) |
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149 * `"fontsizemode"` (not yet implemented) |
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150 * `"innerposition"` (equivalent to `"position"`) |
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151 * `"interactions"` (not yet implemented) |
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152 * `"layout"` (not yet implemented) |
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153 * `"legend"` (not yet implemented) |
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154 * `"nextseriesindex"` (read-only, used by `scatter` |
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155 graphics objects) |
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156 * `"positionconstraint"` (replacement for `"activepositionproperty"` |
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157 which is now a hidden property. No plans for removal.) |
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158 * `"toolbar"` (not yet implemented) |
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159 * `"xaxis"` (not yet implemented) |
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160 * `"yaxis"` (not yet implemented) |
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161 * `"zaxis"` (not yet implemented) |
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Produce better looking TeX superscript and subscripts (bug #58376).
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162 |
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163 ### Matlab compatibility |
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164 |
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165 - The function `griddata` now implements the `"v4"` Biharmonic Spline |
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166 Interpolation method. In adddition, the function now accepts 3-D inputs |
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167 by passing the data to `griddata3`. |
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168 |
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169 - Coordinate transformation functions `cart2sph`, `sph2cart`, |
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170 `cart2pol`, and `pol2cart` now accept either row or column vectors for |
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171 coordinate inputs. A single coordinate matrix with one variable per |
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172 column can still be used as function input, but a single output variable |
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173 will now contain just the first output coordinate, and will no longer |
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174 return the full output coordinate matrix. Output size matches the size |
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175 of input vectors, or in the case of an input matrix will be column |
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176 vectors with rows corresponding to the input coordinate matrix. |
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177 |
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178 - The function `dec2bin` and `dec2hex` now support negative numbers. |
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179 |
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180 - The functions `quantile` and `prctile` now permit operating on |
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181 dimensions greater than `ndims (x)`. |
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182 |
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183 - The function `importdata` now produces more compatible results when |
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184 the file contains a 2-D text matrix. |
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185 |
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186 - `uimenu` now accepts property `"Text"` which is identical to |
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187 `"Label"`. Matlab recommends using `"Text"` in new code, although there |
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188 is no announced date for deprecating `"Label"`. |
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189 |
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190 - The functions `scatter` and `scatter3` now return a handle to a |
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191 scatter graphics object. For compatibility, they return an `hggroup` of |
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192 patch graphics objects when the `"gnuplot"` graphics toolkit is used. In |
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193 previous versions of Octave, these functions returned an `hggroup` of |
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194 patch graphics objects for all graphics toolkits. |
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195 |
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196 - The functions `bar` and `barh` now handle stacked negative bar values |
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197 in a Matlab-compatible manner. Negative values now stack below the zero |
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198 axis independently of a positive value bars in the same stack. |
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199 Previously the negative bars could overlap positive bars depending on |
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200 drawing order. |
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201 |
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202 - The functions `bar` and `barh` now use colors from the `"ColorOrder"` |
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203 axes property rather than the `"Colormap"` figure property unless one |
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204 of the histogram options (@qcode{"hist"}, @qcode{"histc"} was specified. |
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205 |
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206 - The function `saveas` now defaults to saving in Octave figure format |
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207 (.ofig) rather than PDF (.pdf). |
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208 |
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209 - A new warning ID (`"Octave:unimplemented-matlab-functionality"`) has |
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210 been added which prints a warning when Octave's parser recognizes valid |
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211 Matlab code, but for which Octave does not yet implement the |
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212 functionality. By default, this warning is enabled. |
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213 |
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214 - The function `iqr` now uses Matlab compatible interpolation for |
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215 quantile values. Dimension input now allows a vector, "all", and |
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216 dimensions greater than `ndims (x)`. The function compatibly handles |
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217 `Inf` and `NaN` input values. |
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218 |
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219 ### Alphabetical list of new functions added in Octave 7 |
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220 |
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221 * `cospi` |
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222 * `getpixelposition` |
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223 * `endsWith` |
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224 * `fill3` |
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225 * `jsondecode` |
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226 * `jsonencode` |
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227 * `listfonts` |
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228 * `matlab.net.base64decode` |
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229 * `matlab.net.base64encode` |
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230 * `memory` |
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231 * `ordqz` |
28112
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232 * `rng` |
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233 * `sinpi` |
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234 * `startsWith` |
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235 * `streamribbon` |
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236 * `turbo` |
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237 * `uniquetol` |
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238 * `xtickangle` |
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239 * `ytickangle` |
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240 * `ztickangle` |
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241 |
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242 ### Deprecated functions and properties |
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243 |
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244 The following functions and properties have been deprecated in Octave 7 |
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245 and will be removed from Octave 9 (or whatever version is the second |
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246 major release after 7): |
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247 |
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248 - Functions |
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249 |
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250 Function | Replacement |
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251 -----------------------|------------------ |
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252 | |
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253 |
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254 - Properties |
20484 | 255 |
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256 Object | Property | Value |
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257 -----------------|---------------|------------ |
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258 | | |
20484 | 259 |
29302
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260 - Interpreter |
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261 |
29309
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262 * The use of `'...'` for line continuations *inside* double-quoted |
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263 strings has been deprecated. Use `'\'` for line continuations |
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264 inside strings instead. |
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NEWS: Announce deprecation of LFLAGS (bug #59173).
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265 |
29309
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266 * The use of `'\'` as a line continuation *outside* of double-quoted |
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267 strings has been deprecated. Use `'...'` for line continuations |
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268 instead. |
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269 |
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270 * Any trailing whitespace after a `'\'` line continuation has been |
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271 deprecated. Delete unnecessary trailing whitespace. |
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Fix up documentation for new disable_[range,diagonal_matrix,permutation_matrix] fcns.
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272 |
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273 ### Removed functions and properties |
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274 |
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275 The following functions and properties were deprecated in Octave 5 |
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276 and have been removed from Octave 7. |
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277 |
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278 - Functions |
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279 |
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280 Function | Replacement |
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281 -------------------------|------------------ |
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282 `output_max_field_width` | `output_precision` |
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283 `is_keyword` | `iskeyword` |
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284 |
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285 - Properties |
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Overhaul interp1, interp2, interp3 functions.
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286 |
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287 Object | Property | Value |
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288 -----------------|---------------|------------ |
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289 `text` | `fontangle` | `"oblique"` |
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290 `uibuttongroup` | `fontangle` | `"oblique"` |
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291 `uicontrol` | `fontangle` | `"oblique"` |
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292 `uipanel` | `fontangle` | `"oblique"` |
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293 `uitable` | `fontangle` | `"oblique"` |
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294 |
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295 ### Old release news |
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296 |
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297 - [Octave 6.x](etc/NEWS.6) |
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298 - [Octave 5.x](etc/NEWS.5) |
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299 - [Octave 4.x](etc/NEWS.4) |
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300 - [Octave 3.x](etc/NEWS.3) |
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301 - [Octave 2.x](etc/NEWS.2) |
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302 - [Octave 1.x](etc/NEWS.1) |