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1 ## Copyright (C) 2007 David Bateman |
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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 ## Undocumented internal function. |
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20 |
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21 function h = __scatter__ (varargin) |
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22 |
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23 h = varargin{1}; |
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24 nd = varargin{2}; |
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25 fcn = varargin{3}; |
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26 x = varargin{4}(:); |
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27 y = varargin{5}(:); |
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28 istart = 6; |
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29 |
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30 if (nd == 3) |
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31 z = varargin{6}(:); |
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32 istart = 7; |
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33 else |
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34 z = zeros (length (x), 0); |
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35 endif |
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36 |
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37 firstnonnumeric = Inf; |
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38 for i = istart:nargin |
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39 if (! isnumeric (varargin{i})) |
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40 firstnonnumeric = i; |
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41 break; |
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42 endif |
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43 endfor |
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44 |
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45 if (firstnonnumeric > istart) |
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46 s = varargin{istart}; |
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47 if (isempty (s)) |
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48 s = 8; |
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49 endif |
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50 else |
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51 s = 8; |
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52 endif |
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53 ## Note markersize is in points^2 for 2D and points for 3D, and |
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54 ## the below is an approximation, that is empircally visually correct. |
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55 if (nd == 2) |
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56 s = sqrt (s) / 2; |
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57 else |
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58 s = s / 4; |
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59 endif |
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60 |
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61 if (istart < nargin && firstnonnumeric > istart + 1) |
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62 c = varargin{istart + 1}; |
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63 if (isvector (c)) |
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64 c = c(:); |
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65 endif |
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66 elseif (firstnonnumeric == istart + 1 && ischar (varargin{istart + 1})) |
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67 c = varargin{istart + 1}; |
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68 firstnonnumeric++; |
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69 else |
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70 c = 1 : length(x); |
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71 endif |
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72 |
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73 newargs = {}; |
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74 filled = false; |
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75 have_marker = false; |
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76 marker = "o"; |
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77 iarg = firstnonnumeric; |
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78 while (iarg <= nargin) |
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79 arg = varargin{iarg++}; |
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80 if (ischar (arg) && strncmp (tolower (arg), "filled", 6)) |
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81 filled = true; |
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82 elseif ((isstr (arg) || iscell (arg)) && ! have_marker) |
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83 [linespec, valid] = __pltopt__ ("scatter", arg, false); |
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84 if (valid) |
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85 have_marker = true; |
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86 marker = linespec.marker; |
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87 if (strncmp (marker, "none", 4)) |
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88 marker = "o"; |
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89 endif |
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90 else |
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91 error ("scatter: invalid linespec"); |
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92 endif |
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93 else |
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94 newargs{end+1} = arg; |
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95 if (iarg <= nargin) |
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96 newargs{end+1} = varagin{iarg++}; |
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97 endif |
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98 endif |
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99 endwhile |
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100 |
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101 if (ischar (c)) |
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102 h = patch("faces", [1:length(x)].', "vertices", [x, y, z], "facecolor", |
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103 "none", "edgecolor", c, "marker", marker, |
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104 "markersize", s, "linestyle", "none"); |
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105 if (filled) |
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106 set(h, "markerfacecolor", c); |
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107 endif |
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108 else |
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109 h = patch("faces", [1:length(x)].', "vertices", [x, y, z], "facecolor", |
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110 "none", "edgecolor", "flat", "cdata", c, "marker", marker, |
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111 "markersize", s, "linestyle", "none"); |
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112 if (filled) |
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113 set(h, "markerfacecolor", "flat"); |
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114 endif |
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115 ax = get (h, "parent"); |
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116 clim = get (ax, "clim"); |
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117 if (min(c(:)) < clim(1)) |
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118 clim(1) = min(c(:)); |
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119 set (ax, "clim", clim); |
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120 endif |
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121 if (max(c(:)) > clim(2)) |
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122 set (ax, "clim", [clim(1), max(c(:))]); |
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123 endif |
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124 endif |
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125 |
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126 endfunction |
