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annotate NEWS @ 26841:b00bd9afbed3 stable

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doc: Use Markdown syntax for NEWS file and add sections. * NEWS: Use Markdown syntax and add sections. See https://lists.gnu.org/archive/html/octave-maintainers/2019-03/msg00016.html for a discussion.
author Kai T. Ohlhus <k.ohlhus@gmail.com>
date Tue, 05 Mar 2019 09:31:20 +0100
parents c2e6725987ce
children 227feb6e422a
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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1 Summary of important user-visible changes for version 5 (2019-02-23):
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361f7ce80f85 * NEWS: Refer to version "5", not "5.0".
John W. Eaton <jwe@octave.org>
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2 --------------------------------------------------------------------
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d0e972e74851 maint: merge stable to default.
Carnë Draug <carandraug@octave.org>
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3
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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4 ### General improvements
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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5
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Kai T. Ohlhus <k.ohlhus@gmail.com>
parents: 26803
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6 - The Octave plotting system now supports high resolution screens,
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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7 i.e., those with greater than 96 DPI which are referred to as
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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8 HiDPI/Retina monitors.
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ba937c3dce82 Determine an object's shape by "size" (bug #51308, bug #44498, bug #43925).
Kai T. Ohlhus <k.ohlhus@gmail.com>
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9
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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10 - Unicode character support for files and folders in Windows.
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John W. Eaton <jwe@octave.org>
parents: 26425
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11
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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12 - A new core function `movfun` will apply a function to a sliding
b00bd9afbed3 doc: Use Markdown syntax for NEWS file and add sections.
Kai T. Ohlhus <k.ohlhus@gmail.com>
parents: 26803
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13 window of arbitrary size on a dataset and accumulate the results.
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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14 Many common cases have been implemented using the naming
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Kai T. Ohlhus <k.ohlhus@gmail.com>
parents: 26803
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15 scheme `movXXX` where `XXX` is the function that will be applied.
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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16 For example, the moving average over a dataset is `movmean`.
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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17 New moving window functions:
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Michael Leitner
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18
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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19 `movfun` `movslice`
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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20 `movmad` `movmax` `movmean` `movmedian` `movmin` `movprod`
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21 `movstd` `movsum` `movvar`
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22
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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23 - The `fsolve` function has been tweaked to use larger step sizes when
b00bd9afbed3 doc: Use Markdown syntax for NEWS file and add sections.
Kai T. Ohlhus <k.ohlhus@gmail.com>
parents: 26803
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24 calculating the Jacobian of a function with finite differences.
b00bd9afbed3 doc: Use Markdown syntax for NEWS file and add sections.
Kai T. Ohlhus <k.ohlhus@gmail.com>
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25 This leads to faster convergence.
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John W. Eaton <jwe@octave.org>
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26
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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27 - The `ranks` function has been recoded for performance and is now 25X
b00bd9afbed3 doc: Use Markdown syntax for NEWS file and add sections.
Kai T. Ohlhus <k.ohlhus@gmail.com>
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28 faster. In addition, it now supports a third argument that specifies
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Kai T. Ohlhus <k.ohlhus@gmail.com>
parents: 26803
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29 how to resolve the ranking of tie values.
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Juan Pablo Carbajal <ajuanpi+dev@gmail.com>
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31 - The function `randi` has been recoded to produce an unbiased (all
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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32 results are equally likely) sample of integers. This may produce
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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33 different results in existing code. If it is necessary to reproduce
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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34 the exact random integer sequence as in previous versions use
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Daniel J Sebald <daniel.sebald@ieee.org>
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35
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36 `ri = imin + floor ((imax - imin + 1) * rand ());`
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37
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38 - The function `isdefinite` now returns `true` or `false` rather than
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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39 `-1`, `0`, or `1`. To test for a positive semi-definite matrix (old
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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40 output of `0`) check whether the following two conditions hold:
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41
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42 `isdefinite (A) => 0` and `isdefinite (A + 5*TOL, TOL) => 1`
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43
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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44 - The `intmax`, `intmin`, and `flintmax` functions now accept a variable
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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45 as input. Existing code to query the range of an existing variable can
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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46 be simplified by removing the call to `class` that was previously
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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47 required. For example defining the variable `x = int8 (3)` in the
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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48 workspace, calls like
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c280560d9c96 Overhaul special functions modified by GSOC2018 project.
Rik <rik@octave.org>
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49
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50 `range = [ intmin(class(x)), intmax(class(x)) ]`
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51
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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52 can in Octave 5 be simplified to `range = [ intmin(x), intmax(x) ]`.
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71dad5be765a quadcc.cc: Use an Absolute Tolerance, as well as RelTol (Bug #46349).
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53
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54 - The path handling functions no longer perform variable or brace
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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55 expansion on path elements and Octave's load-path is no longer
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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56 subject to these expansions.
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57
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58 - A new printing device is available, `"-ddumb"`, which produces ASCII
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Kai T. Ohlhus <k.ohlhus@gmail.com>
parents: 26803
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59 art for plots. This device is only available with the gnuplot toolkit.
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60
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61
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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62 ### Dependencies
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63
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64 - The GUI requires Qt libraries. The minimum Qt4 version supported is
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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65 Qt4.8. Qt5 of any version is preferred.
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Dave Goel <deego3@gmail.com>
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66
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67 - The OSMesa library is no longer used. To print invisible figures
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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68 when using OpenGL graphics, the Qt `QOFFSCREENSURFACE` feature must be
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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69 available and you must use the qt graphics toolkit.
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70
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71 - The FFTW library is now required to perform FFT calculations.
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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72 The FFTPACK sources have been removed from Octave.
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73
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74
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75 ### Matlab compatibility
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a56d283ff18a Honor "interruptible" for property listeners (bug #52804).
Pantxo Diribarne <pantxo.diribarne@gmail.com>
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76
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77 - The determination of an object's dimensions, size, and shape by the
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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78 functions `ndims`, `rows`, `columns`, `isscalar`, `isvector`,
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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79 `isrow`, `iscolumn`, `ismatrix`, and `issquare` now fully depends
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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80 on the function size. Thus, any user-defined object can ensure correct
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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81 treatment by the aforementioned functions by properly overloading the
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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82 `size` function.
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Rik <rik@octave.org>
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83
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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84 - The functions `issymmetric` and `ishermitian` accept an option
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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85 `"nonskew"` or `"skew"` to calculate the symmetric or skew-symmetric
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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86 property of a matrix. Performance has also been increased.
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87
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88 - The `issorted` function now uses a direction option of `"ascend"`
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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89 or `"descend"`. Change all uses of `"ascending"` and `"descending"`
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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90 in existing code to the new options.
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91
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92 - The `strncmp` and `strncmpi` functions now return `true` if the two
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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93 input strings match, even though the number of characters specified
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94 by `n` exceeds the string length. For Example:
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96 `strncmp ("abc", "abc", 100)`
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97
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98 returns `true` in Octave 5 and `false` in older versions of Octave.
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99
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100 - The `str2func` function no longer accepts a second `"global"` argument.
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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101 This argument was typically used to allow functions that accept
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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102 function names as arguments to avoid conflicts with subfunctions or
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103 nested functions. Instead, it's best to avoid this situation
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104 entirely and require users to pass function handles rather than
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105 function names.
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106
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107 - Using `clear` with no arguments now removes only local variables
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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108 from the current workspace. Global variables will no longer be
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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109 visible, but they continue to exist in the global workspace and
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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110 possibly other workspaces such as the base workspace.
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111
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112
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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113 #### Nonlinear Equations
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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114
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115 Several default solver options have been changed to be Matlab compatible.
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116 This *may* result in existing code producing different results.
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117
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118 - `fsolve`
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119
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120 Option | New Default | Old Default
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121 ---------------|------------------|-------------
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122 `FinDiffType` | `"forward"` | `"central"`
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123 `MaxFunEvals` | `100*length(x0)` | `Inf`
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124 `TolFun` | `1e-6` | `1e-7`
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125 `TolX` | `1e-6` | `1e-7`
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126 `Updating` | `"off"` | `"on"`
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127
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128 - `fminsearch`
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129
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130 Option | New Default | Old Default
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131 ---------|-------------|------------
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132 `TolFun` | `1e-7` | `1e-4`
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133
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134 - `fminbnd`
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135
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136 Option | New Default | Old Default
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137 ---------------|-------------|------------
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138 `MaxFunEvals` | `500` | `Inf`
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139 `MaxIter` | `500` | `Inf`
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140 `TolX` | `1e-4` | `1e-8`
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141
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142 - `fminunc`
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143
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144 Option | New Default | Old Default
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145 ---------------|------------------|------------
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146 `FinDiffType` | `"forward"` | `"central"`
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147 `MaxFunEvals` | `100*length(x0)` | `Inf`
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148 `TolX` | `1e-6` | `1e-7`
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149 `TolFun` | `1e-6` | `1e-7`
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150
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151
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152 #### Graphic objects
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153
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154 - Figure graphic objects have a new property `"Number"` which is
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155 read-only and will return the handle (number) of the figure.
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156 However, if the property `"IntegerHandle"` has been set to `"off"`
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157 then the property will return an empty matrix `[]`.
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158
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159 - Patch and surface graphic objects now use the `"FaceNormals"` property
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160 for flat lighting.
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Jun Wang <jstzwj@aliyun.com>
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161
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162 - `"FaceNormals"` and `"VertexNormals"` for patch and surface graphic
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163 objects are now calculated only when necessary to improve graphics
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164 performance. In order for any normals to be calculated the
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165 `"FaceLighting"` property must be set to `"flat"` (FaceNormals) or
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166 `"gouraud"` (VertexNormals), **and** a light object must be present
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167 in the axes.
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168
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169 - The `"Margin"` property of `text`-objects has a new default of `3`
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170 rather than `2`.
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171
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172 - Printing to raster formats (bitmaps like PNG or JPEG) now uses an
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173 OpenGL-based method by default. The print options `"-opengl"`
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174 (raster) and `"-painters"` (vector) have been added ("qt" toolkit
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175 only). The figure property `"renderer"` specifies which renderer to
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176 use. When the property `"renderermode"` is `"auto"` Octave will select
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177 `"-opengl"` for a raster output format and `"-painters"` for a vector
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178 output format.
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179
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180 - A new print option `"-RGBImage"` has been added which captures the
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181 pixels of a figure as an image. This is similar to screen capture
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182 tools, except that print formatting options can be used to, for
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183 example, change the resolution or display the image in black and
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184 white.
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185
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186 - Two new print options for page-based formats (PDF, PostScript) have
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187 been added. The `"-fillpage"` option will stretch the plot to occupy
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188 the entire page with 0.25 inch margins all around. The `"-bestfit"`
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189 option will expand the plot to take up as much room as possible on
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190 the page without distorting the original aspect ratio of the plot.
26327
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191
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192 - Printing using the `"-dtiff"` output device will now create compressed
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193 images using LZW compression. To produce uncompressed images use the
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194 `"-dtiffn"` device.
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195
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196
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197 ### Legacy functions
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198
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199 The following functions have been declared legacy functions which
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200 means they are obsolete and should not be used in any new code.
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201 Unlike deprecated functions, however, their removal from Octave has
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202 not yet been scheduled.
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John W. Eaton <jwe@octave.org>
parents: 26115
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203
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204 Function | Replacement
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205 -----------------------|------------------
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206 `findstr` | `strfind`
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207 `flipdim` | `flip`
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208 `isdir` | `isfolder` or `dir_in_loadpath`
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209 `isequalwithequalnans` | `isequaln`
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210 `isstr` | `ischar`
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211 `setstr` | `char`
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212 `strmatch` | `strncmp` or `strcmp`
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213 `strread` | `textscan`
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214 `textread` | `textscan`
26178
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John W. Eaton <jwe@octave.org>
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215
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216
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217 ### Deprecated functions and properties
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218
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219 The following functions and graphics properties have been deprecated
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220 in Octave 5 and will be removed from Octave 7 (or whatever version
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221 is the second major release after 5):
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222
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223 - Functions
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224
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225 Function | Replacement
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226 -------------------------|-------------------
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227 `output_max_field_width` | `output_precision`
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228 `is_keyword` | `iskeyword`
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229
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230 - Graphics properties
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231
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232 Object | Property | Value
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233 -----------------|---------------|------------
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234 `text` | `fontangle` | `"oblique"`
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235 `uibuttongroup` | `fontangle` | `"oblique"`
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236 `uicontrol` | `fontangle` | `"oblique"`
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237 `uipanel` | `fontangle` | `"oblique"`
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238 `uitable` | `fontangle` | `"oblique"`
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239
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240 - Specifying `legend` position with a numeric argument is deprecated.
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241 Use a string argument instead.
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242
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243 - The environment variable used by `mkoctfile` for linker flags is now
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244 `LDFLAGS` rather than `LFLAGS`. `LFLAGS` is deprecated, and a warning
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245 is emitted if is used, but it will continue to work.
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246
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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247
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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248 ### Removed functions and properties
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249
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250 The following functions and properties were deprecated in Octave 4.2
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251 and have been removed from Octave 5.
22613
edd04ce99891 Remove functions deprecated in version 4.0.
Rik <rik@octave.org>
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252
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253 - Functions
20157
e410d62ae2c8 maint: move NEWS from 45565ecec019 from the release 4.0 to 4.2.
Carnë Draug <carandraug@octave.org>
parents: 20154
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254
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255 Function | Replacement
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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256 -----------------------|------------------
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257 `bitmax` | `flintmax`
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258 `mahalanobis` | `mahal` in Octave Forge statistics pkg
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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259 `md5sum` | `hash`
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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260 `octave_config_info` | `__octave_config_info__`
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261 `onenormest` | `normest1`
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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262 `sleep` | `pause`
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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263 `usleep` | `pause`
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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264 `wavread` | `audioread`
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265 `wavwrite` | `audiowrite`
22613
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Rik <rik@octave.org>
parents: 22586
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266
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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267 - Properties
20484
c8ec0b72b7a6 Deprecate wavread and wavwrite.
Rik <rik@octave.org>
parents: 20466
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268
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269 Object | Property | Value
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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270 ------------|-------------------|---------
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271 `axes` | `xaxislocation` | `"zero"`
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272 | `yaxislocation` | `"zero"`
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273 `hggroup` | `erasemode` |
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274 `image` | `erasemode` |
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275 `line` | `erasemode` |
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276 `patch` | `erasemode` |
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277 `patch` | `normalmode` |
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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278 `surface` | `erasemode` |
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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279 `surface` | `normalmode` |
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280 `text` | `erasemode` |
20484
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Rik <rik@octave.org>
parents: 20466
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281
19398
9e5b64b3c1fe Fix up documentation for new disable_[range,diagonal_matrix,permutation_matrix] fcns.
Rik <rik@octave.org>
parents: 19386
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282
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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283 ### Alphabetical list of new functions added in 5
18606
0ede4dbb37f1 Overhaul interp1, interp2, interp3 functions.
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284
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285 - `clearvars`
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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286 - `isfile`
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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287 - `isfolder`
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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288 - `matlab.lang.makeUniqueStrings`
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289 - `matlab.lang.makeValidName`
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290 - `movegui`
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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291 - `movfun`
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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292 - `movie`
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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293 - `movmad`
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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294 - `movmax`
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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295 - `movmean`
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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296 - `movmedian`
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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297 - `movmin`
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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298 - `movprod`
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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299 - `movslice`
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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300 - `movstd`
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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301 - `movsum`
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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302 - `movvar`
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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303 - `openfig`
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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304 - `ordeig`
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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305 - `savefig`
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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306 - `uitable`
19122
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Rik <rik@octave.org>
parents: 19119
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307
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308
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Kai T. Ohlhus <k.ohlhus@gmail.com>
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309 ### Old release news
19965
d20dd211cc89 Enable float truncation by default for octave builds.
Rik <rik@octave.org>
parents: 19958
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310
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311 - [Octave 4.4.x](etc/NEWS.4)
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312 - [Octave 4.2.x](etc/NEWS.4)
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313 - [Octave 4.0.x](etc/NEWS.4)
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314 - [Octave 3.8.x](etc/NEWS.3)
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315 - [Octave 3.6.x](etc/NEWS.3)
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316 - [Octave 3.4.x](etc/NEWS.3)
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317 - [Octave 3.2.x](etc/NEWS.3)
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318 - [Octave 3.0.x](etc/NEWS.3)
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319 - [Octave 2.x](etc/NEWS.2)
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320 - [Octave 1.x](etc/NEWS.1)