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annotate scripts/image/spinmap.m @ 19002:492c56149535 stable rc-3-8-2-1

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3.8.2 release candidate 1 * configure.ac (OCTAVE_VERSION): Bump to 3.8.2-rc1. (OCTAVE_MINOR_VERSION): Bump to 2-rc1. (OCTAVE_RELEASE_DATE): Set to 2014-06-06.
author John W. Eaton <jwe@octave.org>
date Fri, 06 Jun 2014 11:43:17 -0400
parents d63878346099
children 446c46af4b42
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d63878346099 maint: Update copyright notices for release.
John W. Eaton <jwe@octave.org>
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1 ## Copyright (C) 2007-2013 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} {} spinmap ()
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21 ## @deftypefnx {Function File} {} spinmap (@var{t})
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22 ## @deftypefnx {Function File} {} spinmap (@var{t}, @var{inc})
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23 ## @deftypefnx {Function File} {} spinmap ("inf")
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24 ## Cycle the colormap for @var{t} seconds with a color increment of @var{inc}.
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25 ## Both parameters are optional. The default cycle time is 5 seconds and the
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26 ## default increment is 2. If the option @qcode{"inf"} is given then cycle
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27 ## continuously until @kbd{Control-C} is pressed.
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28 ##
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29 ## When rotating the original color 1 becomes color 2, color 2 becomes
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30 ## color 3, etc. A positive or negative increment is allowed and a higher
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31 ## value of @var{inc} will cause faster cycling through the colormap.
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32 ## @seealso{colormap}
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33 ## @end deftypefn
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34
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35 ## Author: Kai Habel <kai.habel at gmx.de>
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36
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37 function spinmap (t = 5, inc = 2)
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38
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39 if (nargin > 2)
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40 print_usage ();
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41 elseif (ischar (t))
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42 if (strcmpi (t, "inf"))
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43 t = Inf;
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44 else
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45 error ('spinmap: time T must be a real scalar or "inf"');
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46 endif
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47 elseif (! isscalar (t) || ! isreal (t))
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48 error ("spinmap: time T must be a real scalar");
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49 endif
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50
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51 cmap = cmap_orig = get (gcf (), "colormap");
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52
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53 t0 = clock;
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54 while (etime (clock, t0) < t)
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55 cmap = shift (cmap, inc, 1);
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56 set (gcf (), "colormap", cmap);
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57 drawnow ();
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58 endwhile
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59
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60 set (gcf (), "colormap", cmap_orig);
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61
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62 endfunction
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63
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64
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65 %!demo
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66 %! clf;
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67 %! colormap (rainbow (128));
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68 %! imagesc (1:8);
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69 %! axis off;
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70 %! title ("Rotate color bars to the right");
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71 %! spinmap (3, 1);
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72