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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 2, or (at your option) |
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8 ## 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, write to the Free |
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17 ## Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
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18 ## 02111-1307, USA. |
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19 |
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20 ## -*- texinfo -*- |
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21 ## @deftypefn {Function File} {} figure (@var{n}) |
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22 ## Set the current plot window to plot window @var{n}. This function |
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23 ## currently requires X11 and a version of gnuplot that supports multiple |
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24 ## frames. If @var{N} is not specified, the next available window |
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25 ## number is chosen. |
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26 ## @end deftypefn |
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27 |
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28 ## Author: jwe |
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29 |
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30 function f = figure (n) |
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31 |
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32 static figure_list = create_set (0); |
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33 static figure_called = 0; |
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34 |
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35 if (nargin == 0) |
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36 f = max (figure_list) + 1; |
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37 else |
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38 f = n; |
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39 endif |
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40 |
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41 if (nargin < 2) |
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42 if (gnuplot_has_frames) |
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43 gnuterm = getenv ("GNUTERM"); |
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44 if (isempty (gnuterm) && ! isempty ("DISPLAY")) |
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45 gnuterm = "x11"; |
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46 endif |
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47 if (! isempty (gnuterm)) |
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48 oneplot (); |
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49 figure_list = union (figure_list, f); |
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50 eval (sprintf ("gset term %s %d\n", gnuterm, f)); |
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51 else |
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52 error ("figure: requires GNUTERM (Aqua) or DISPLAY (X11)"); |
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53 endif |
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54 else |
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55 error ("figure: gnuplot doesn't appear to support this feature"); |
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56 endif |
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57 elseif (rem (nargin, 2) == 0) |
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58 if (! figure_called) |
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59 figure_called = 1; |
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60 warning ("figure: setting figure properties is unsupported"); |
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61 endif |
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62 else |
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63 usage ("figure (n)"); |
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64 endif |
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65 |
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66 endfunction |
