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1 ## Copyright (C) 2007 Kai Habel |
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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} {} pcolor (@var{x}, @var{y}, @var{c}) |
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21 ## @deftypefnx {Function File} {} pcolor (@var{c}) |
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22 ## Density plot for given matrices @var{x}, and @var{y} from @code{meshgrid} and |
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23 ## a matrix @var{c} corresponding to the @var{x} and @var{y} coordinates of |
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24 ## the mesh. If @var{x} and @var{y} are vectors, then a typical vertex |
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25 ## is (@var{x}(j), @var{y}(i), @var{c}(i,j)). Thus, columns of @var{c} |
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26 ## correspond to different @var{x} values and rows of @var{c} correspond |
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27 ## to different @var{y} values. |
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28 ## @seealso{meshgrid, contour} |
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29 ## @end deftypefn |
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30 |
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31 ## Author: Kai Habel <kai.habel@gmx.de> |
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32 |
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33 function h = pcolor (x, y, c) |
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34 |
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35 newplot (); |
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36 |
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37 if (nargin == 1) |
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38 c = x; |
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39 z = zeros (size (c)); |
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40 [nr, nc] = size (c); |
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41 [x, y] = meshgrid (1:nr, 1:nc); |
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42 elseif (nargin == 3) |
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43 z = zeros (size (c)); |
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44 else |
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45 print_usage (); |
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46 endif |
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47 |
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48 tmp = surface (x, y, z, c); |
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49 |
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50 ax = get (tmp, "parent"); |
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51 |
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52 set (tmp, "facecolor", "flat"); |
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53 set (ax, "box", "on"); |
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54 |
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55 if (! ishold ()) |
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56 set (ax, "view", [0, 90]); |
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57 endif |
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58 |
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59 if (nargout > 0) |
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60 h = tmp; |
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61 endif |
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62 |
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63 endfunction |
