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allow line function to accept matrix arguments * __line__.m: Plot columns from matrix arguments. If no data arguments are given, set default values.
author John W. Eaton <jwe@octave.org>
date Tue, 27 Sep 2011 02:06:25 -0400
parents fd0a3ac60b0e
children 7467e90271f4
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1 ## Copyright (C) 2005-2011 John W. Eaton
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, see
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17 ## <http://www.gnu.org/licenses/>.
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18
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Function File} {@var{h} =} __line__ (@var{p}, @dots{})
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21 ## Undocumented internal function.
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22 ## @end deftypefn
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23
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24 ## __line__ (p, x, y, z)
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25 ## Create line object from x, y, and z with parent p.
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26 ## Return handle to line object.
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27
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28 ## Author: jwe
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29
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30 function h = __line__ (p, varargin)
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31
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32 if (nargin < 1)
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33 print_usage ();
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34 endif
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35
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36 nvargs = numel (varargin);
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37
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38 if (nvargs > 1 && isnumeric (varargin{1}) && isnumeric (varargin{2}))
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39 if (nvargs > 2 && isnumeric (varargin{3}))
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40 num_data_args = 3;
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41 else
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42 num_data_args = 2;
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43 endif
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44 else
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45 num_data_args = 0;
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46 endif
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47
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48 if (rem (nvargs - num_data_args, 2) != 0)
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49 print_usage ("line");
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50 endif
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51
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52 other_args = {};
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53 if (nvargs > num_data_args)
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54 other_args = varargin(num_data_args+1:end);
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55 endif
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56
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57 nlines = 0;
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58 nvecpts = 0;
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59 ismat = false (1, 3);
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60 for i = 1:num_data_args
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61 tmp = varargin{i}(:,:);
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62 if (isvector (tmp))
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63 nlines = max (1, nlines);
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64 if (! isscalar (tmp))
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65 if (nvecpts == 0)
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66 nvecpts = numel (tmp);
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67 elseif (nvecpts != numel (tmp))
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68 error ("line: data size mismatch");
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69 endif
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70 endif
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71 else
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72 ismat(i) = true;
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73 nlines = max (columns (tmp), nlines);
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74 endif
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75 varargin{i} = tmp;
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76 endfor
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77
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78 if (num_data_args == 0)
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79 varargin = {[0, 1], [0, 1]};
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80 num_data_args = 2;
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81 nlines = 1;
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82 nvecpts = 2;
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83 endif
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84
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85 handles = zeros (nlines, 1);
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86
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87 data = cell (1, 3);
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88
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89 if (num_data_args > 1)
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90 data(1) = varargin{1};
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91 data(2) = varargin{2};
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92 if (num_data_args == 3)
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93 data(3) = varargin{3};
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94 endif
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95 endif
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96
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97 data_args = reshape ({"xdata", "ydata", "zdata"; data{:}}, [1, 6]);
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98 mask = reshape ([false(1,3); ismat], [1, 6]);
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99
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100 for i = 1:nlines
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101 tmp = data(ismat);
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102 if (! size_equal (tmp) || any (nvecpts != cellfun ("size", tmp, 1)))
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103 error ("line: data size_mismatch");
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104 endif
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105
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106 data_args(mask) = cellfun (@(x) x(:,i), data(ismat),
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107 "uniformoutput", false);
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108
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109 handles(i) = __go_line__ (p, data_args{:}, other_args{:});
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110
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111 endfor
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112
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113 if (nargout > 0)
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114 h = handles;
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115 endif
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116
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117 endfunction