annotate NEWS @ 8070:3b53b25e2550

Add data sources and line series
author David Bateman <dbateman@free.fr>
date Thu, 28 Aug 2008 12:23:54 -0400
parents 44d206ae68c9
children 53202d60086f
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1 Summary of important user-visible changes for version 3.2:
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2 ---------------------------------------------------------
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3
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4 ** Compatibility with Matlab graphics is much better now.
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5
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6 The hggroup object and associated listener callback functions have
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7 been added allowing the inclusion of group objects. Data sources
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8 have been added to these group objects such that
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9
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10 x = 0:0.1:10;
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11 y = sin (x);
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12 plot (x, y, "ydatasource", "y");
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13 for i = 1 : 100
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14 pause(0.1)
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15 y = sin (x + 0.1 * i);
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16 refreshdata();
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17 endfor
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18
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19 works as expected.
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20
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21 TO BE WRITTEN (Shai / Micheal inputs please)
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22
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23 ** Experimental OpenGL/FLTK based backend to replace gnuplot
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24
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25 An experimental backend to replace the gnuplot backend has been
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26 written based on FLTK. This backend is off by default. You can
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27 switch to using this with the command
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28
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29 backend ("fltk")
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30
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31 for all future figures or for a particular figure with the command
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32
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33 backend (h, "fltk")
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34
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35 where "h" is a valid figure handle.
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36
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37 TO BE WRITTEN (Shai / Micheal inputs please)
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38
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39 ** Eliminate the functions for direct access to gnuplot from Octave.
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40 The functions __gnuplot_plot__, __gnuplot_set__, __gnuplot_raw__,
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41 __gnuplot_show__, __gnuplot_replot__, __gnuplot_splot__,
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42 __gnuplot_save_data__ and __gnuplot_send_inline_data__ have been
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43 removed from Octave. These function were incompatible with the high
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44 level graphics handle code.
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45
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46 ** The fsolve function now accepts an option structure argument (see
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47 also the optimset function).
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48 The INFO values returned from fsolve have changed to be compatible
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49 with Matlab's fsolve function.
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50
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51 ** Object Oriented Programming
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52
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53 TO BE WRITTEN
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54
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55 ** Block comments
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56 Commented code can be between matching "%{" and "%}" markers, even
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57 if the commented code spans several line. This allows blocks code
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58 to be commented, without needing to comment each line. For
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59 example,
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60
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61 function y = func (x)
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62 y = 2 * x;
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63 %{
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64 y += 1;
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65 %}
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66 endfunction
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67
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68 the line "y += 1;" will not be executed.
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69
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70 ** Removed the Control, Finance and Quaternions toolboxes
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71 These toolboxes have been removed and ported to octave-forge, and
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72 they are specialized toolboxes that not all users need. These
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73 functions can be reinstalled use the Octave package manager (see
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74 the pkg function) and the packages available at
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76 http://octave.sourceforge.net/packages.html
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77
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78 ** The imwrite and imread function have been included in Octave based
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79 on the GraphicsMagick library.
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80
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81 ** Special treatment in the parser of expressions like "a' * b". In
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82 these cases the transpose is no longer explicitly formed and BLAS
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83 libraries are called with the transpose flagged. This significantly
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84 improves the speed.
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85
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86 ** Single Precision data type
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87 Octave now includes a single precision data type. Single precision
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88 variables can be created with the "single" command, or from
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89 function like ones, etc. For example
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90
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91 single (1)
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92 ones (2, 2, "single")
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93 zeros (2, 2, "single")
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94 eye (2, 2, "single")
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95 Inf (2, 2, "single")
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96 NaN (2, 2, "single")
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97 NA (2, 2, "single")
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98
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99 all create single precision variables. Mixed double/single
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100 precision operators and functions return single precision
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101 types. As a consequence of this addition to Octave the internal
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102 representation of the double precision NA value has changed, and
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103 so users that make use of data generated by Octave with R or
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104 visa-versa are warned that compatibility might not be assured.
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105
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106 See NEWS.3 for old news.