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comet.m: Speed up animation by using low-level graphic commands. * scripts/plot/comet.m: Speed up animation by using low-level graphic commands.
author Rik <rik@octave.org>
date Mon, 05 Aug 2013 15:44:02 -0700
parents eaab03308c0b
children 4f1d827e1302
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1 ## Copyright (C) 2005-2012 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 ## -*- texinfo -*-
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20 ## @deftypefn {Function File} {@var{h} =} gca ()
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21 ## Return a handle to the current axis object.
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22 ##
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23 ## If no axis object exists, create one and return its handle. The handle may
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24 ## then be used to examine or set properties of the axes. For example,
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25 ##
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26 ## @example
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27 ## @group
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28 ## ax = gca ();
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29 ## set (ax, "position", [0.5, 0.5, 0.5, 0.5]);
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30 ## @end group
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31 ## @end example
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32 ##
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33 ## @noindent
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34 ## creates an empty axes object, then changes its location and size in the
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35 ## figure window.
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36 ## @seealso{gcf, gco, gcbf, gcbo, get, set}
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37 ## @end deftypefn
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38
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39 ## Author: jwe
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40
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41 function h = gca ()
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42
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43 if (nargin == 0)
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44 h = get (gcf (), "currentaxes");
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45 if (isempty (h))
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46 h = axes ();
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47 endif
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48 else
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49 print_usage ();
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50 endif
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51
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52 endfunction
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55 %!test
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56 %! hf = figure ("visible", "off");
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57 %! ax = axes;
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58 %! unwind_protect
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59 %! assert (gca, ax);
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60 %! unwind_protect_cleanup
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61 %! close (hf);
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62 %! end_unwind_protect
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