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annotate scripts/image/spinmap.m @ 20771:87b557ee8e5d

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clean up and vectorize code for dense output in ode45 * scripts/ode/private/ode_rk_interpolate.m: new file * scripts/ode/private/ode_rk_interpolate.m(hermite_quartic_interpolation): move to internal function, use vectorization and broadcasting. * scripts/ode/private/hermite_quartic_interpolation.m: remove file * scripts/ode/module.mk: list added and removed files * scripts/ode/private/integrate_adaptive.m: use new interpolation code.
author Carlo de Falco <carlo.defalco@polimi.it>
date Tue, 06 Oct 2015 19:28:59 +0200
parents 7503499a252b
children
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rev   line source
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4197fc428c7d maint: Update copyright notices for 2015.
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1 ## Copyright (C) 2007-2015 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 ##
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26 ## Both parameters are optional. The default cycle time is 5 seconds and the
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27 ## default increment is 2. If the option @qcode{"inf"} is given then cycle
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28 ## continuously until @kbd{Control-C} is pressed.
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29 ##
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30 ## When rotating, the original color 1 becomes color 2, color 2 becomes
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31 ## color 3, etc. A positive or negative increment is allowed and a higher
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32 ## value of @var{inc} will cause faster cycling through the colormap.
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33 ## @seealso{colormap}
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34 ## @end deftypefn
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35
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36 ## Author: Kai Habel <kai.habel at gmx.de>
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37
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38 function spinmap (t = 5, inc = 2)
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39
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40 if (nargin > 2)
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41 print_usage ();
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42 elseif (ischar (t))
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43 if (strcmpi (t, "inf"))
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44 t = Inf;
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45 else
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46 error ('spinmap: time T must be a real scalar or "inf"');
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47 endif
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48 elseif (! isscalar (t) || ! isreal (t))
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49 error ("spinmap: time T must be a real scalar");
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50 endif
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51
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52 cmap = cmap_orig = get (gcf (), "colormap");
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53
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54 t0 = clock;
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55 while (etime (clock, t0) < t)
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56 cmap = shift (cmap, inc, 1);
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57 set (gcf (), "colormap", cmap);
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58 drawnow ();
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59 endwhile
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60
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61 set (gcf (), "colormap", cmap_orig);
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62
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63 endfunction
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64
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65
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66 %!demo
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67 %! clf;
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68 %! colormap (rainbow (128));
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69 %! imagesc (1:8);
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70 %! axis off;
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71 %! title ("Rotate color bars to the right");
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72 %! spinmap (3, 1);
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73