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1 ## Copyright (C) 2007 David Bateman |
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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} {} caxis (@var{limits}) |
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21 ## @deftypefnx {Function File} {} caxis (@var{h}, @dots{}) |
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22 ## Set color axis limits for plots. |
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23 ## |
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24 ## The argument @var{limits} should be a 2 element vector specifying the |
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25 ## lower and upper limits to assign to the first and last value in the |
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26 ## colormap. Values outside this range are clamped to the first and last |
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27 ## colormap entries. |
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28 ## |
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29 ## If @var{limits} is 'auto', then automatic colormap scaling is applied, |
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30 ## whereas if @var{limits} is 'manual' the colormap scaling is set to manual. |
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31 ## |
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32 ## Called without any arguments to current color axis limits are returned. |
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33 ## |
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34 ## If an axes handle is passed as the first argument, then operate on |
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35 ## this axes rather than the current axes. |
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36 ## @end deftypefn |
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37 |
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38 ## PKG_ADD: mark_as_command caxis |
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39 |
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40 function varargout = caxis (varargin) |
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41 |
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42 [h, varargin, nargin] = __plt_get_axis_arg__ ("caxis", varargin{:}); |
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43 |
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44 oldh = gca (); |
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45 unwind_protect |
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46 axes (h); |
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47 varargout = cell (max (nargin == 0, nargout), 1); |
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48 if (isempty (varargout)) |
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49 __caxis__ (h, varargin{:}); |
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50 else |
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51 [varargout{:}] = __caxis__ (h, varargin{:}); |
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52 endif |
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53 unwind_protect_cleanup |
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54 axes (oldh); |
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55 end_unwind_protect |
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56 |
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57 endfunction |
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58 |
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59 function [cmin, cmax] = __caxis__ (ca, ax, varargin) |
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60 |
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61 if (nargin == 1) |
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62 cmin = get (ca, "clim"); |
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63 if (nargout > 1) |
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64 cmax = cmin(2); |
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65 cmin = cmin(1); |
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66 endif |
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67 elseif (ischar (ax)) |
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68 ax = tolower (ax); |
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69 if (strcmp (ax, "auto")) |
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70 set (ca, "climmode", "auto"); |
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71 elseif (strcmp (ax, "manual")) |
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72 set (ca, "climmode", "manual"); |
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73 endif |
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74 elseif (isvector (ax)) |
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75 len = length (ax); |
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76 |
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77 if (len != 2) |
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78 error ("caxis: expecting vector with 2 elements"); |
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79 endif |
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80 |
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81 set (ca, "clim", [ax(1), ax(2)]); |
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82 else |
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83 error ("caxis: expecting no args, a string or a 2 element vector"); |
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84 endif |
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85 |
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86 if (nargin > 2) |
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87 __caxis__ (ca, varargin{:})' |
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88 endif |
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89 |
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90 endfunction |
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91 |
