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annotate scripts/image/__img__.m @ 7276:1e8e64d71e34

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[project @ 2007-12-10 20:09:59 by jwe]
author jwe
date Mon, 10 Dec 2007 20:09:59 +0000
parents a1dbe9d80eee
children 86ba621332ff
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1 ## Copyright (C) 1996, 1997, 2006, 2007 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 ## Undocumented internal function.
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20
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21 ## -*- texinfo -*-
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22 ## @deftypefn {Function File} {} __img__ (@var{img})
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23 ## @deftypefnx {Function File} {} __img__ (@var{x}, @var{y}, @var{img})
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24 ## Generic image creation.
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25 ##
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26 ## The axis values corresponding to the matrix elements are specified in
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27 ## @var{x} and @var{y}. If you're not using gnuplot 4.2 or later, these
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28 ## variables are ignored.
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29 ## @end deftypefn
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30
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31 ## Author: Tony Richardson <arichard@stark.cc.oh.us>
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32 ## Created: July 1994
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33 ## Adapted-By: jwe
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34
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35 function h = __img__ (x, y, img, varargin)
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36
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37 newplot ();
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38
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39 if (isempty (img))
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40 error ("__img__: matrix is empty");
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41 endif
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42
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43 if (isempty (x))
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44 x = [1, columns(img)];
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45 endif
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46
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47 if (isempty (y))
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48 y = [1, rows(img)];
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49 endif
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50
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51 xlim = [x(1), x(end)];
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52 ylim = [y(1), y(end)];
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53
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54 ca = gca ();
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55
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56 tmp = __go_image__ (ca, "cdata", img, "xdata", xlim, "ydata", ylim,
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57 varargin {:});
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58
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59 set (ca, "view", [0, 90]);
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60
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61 if (strcmp (get (ca, "nextplot"), "replace"))
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62 set (ca, "ydir", "reverse");
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63 endif
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64
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65 if (nargout > 0)
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66 h = tmp;
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67 endif
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68
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69 endfunction