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1 ## Copyright (C) 1996, 1997 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) |
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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 |
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58 set (ca, "view", [0, 90]); |
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59 |
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60 if (strcmp (get (ca, "nextplot"), "replace")) |
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61 set (ca, "ydir", "reverse"); |
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62 endif |
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63 |
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64 if (nargout > 0) |
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65 h = tmp; |
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66 endif |
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67 |
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68 endfunction |
