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annotate scripts/plot/pie.m @ 15536:2e8eb9ac43a5 stable rc-3-6-4-0

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3.6.4-rc0 release candidate * configure.ac (AC_INIT): Version is now 3.6.2-rc0. (OCTAVE_RELEASE_DATE): Now 2012-05-11.
author John W. Eaton <jwe@octave.org>
date Wed, 17 Oct 2012 10:05:44 -0400
parents 72c96de7a403
children 11949c9795a0
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72c96de7a403 maint: update copyright notices for 2012
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1 ## Copyright (C) 2007-2012 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} {} pie (@var{x})
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21 ## @deftypefnx {Function File} {} pie (@var{x}, @var{explode})
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22 ## @deftypefnx {Function File} {} pie (@dots{}, @var{labels})
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23 ## @deftypefnx {Function File} {} pie (@var{h}, @dots{});
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24 ## @deftypefnx {Function File} {@var{h} =} pie (@dots{});
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25 ## Produce a 2-D pie chart.
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26 ##
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27 ## Called with a single vector argument, produces a pie chart of the
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28 ## elements in @var{x}, with the size of the slice determined by percentage
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29 ## size of the values of @var{x}.
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30 ##
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31 ## The variable @var{explode} is a vector of the same length as @var{x} that
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32 ## if non zero 'explodes' the slice from the pie chart.
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33 ##
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34 ## If given @var{labels} is a cell array of strings of the same length as
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35 ## @var{x}, giving the labels of each of the slices of the pie chart.
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36 ##
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37 ## The optional return value @var{h} is a list of handles to the patch
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38 ## and text objects generating the plot.
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39 ##
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40 ## @seealso{pie3, bar, stem}
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41 ## @end deftypefn
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42
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43 ## Very roughly based on pie.m from octave-forge whose author was
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44 ## Daniel Heiserer <Daniel.heiserer@physik.tu-muenchen.de>
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45
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46 function retval = pie (varargin)
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47
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48 [h, varargin] = __plt_get_axis_arg__ ("pie", varargin{:});
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49
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50 if (nargin < 1)
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51 print_usage ();
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52 else
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53 oldh = gca ();
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54 unwind_protect
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55 axes (h);
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56 newplot ();
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57 tmp = __pie__ ("pie", h, varargin{:});
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58 unwind_protect_cleanup
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59 axes (oldh);
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60 end_unwind_protect
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61 endif
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62
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63 if (nargout > 0)
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64 retval = tmp;
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65 endif
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66
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67 endfunction
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68
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69
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70 %!demo
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71 %! clf
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72 %! pie ([3, 2, 1], [0, 0, 1]);
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73 %! colormap ([1,0,0;0,1,0;0,0,1;1,1,0;1,0,1;0,1,1]);
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74
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75 %!demo
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76 %! clf
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77 %! pie ([3, 2, 1], [0, 0, 1], {"Cheddar", "Swiss", "Camembert"});
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78 %! colormap ([1,0,0;0,1,0;0,0,1;1,1,0;1,0,1;0,1,1]);
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79 %! axis ([-2,2,-2,2]);
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80
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81 %!demo
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82 %! clf
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83 %! pie ([0.17, 0.34, 0.41], {"Cheddar", "Swiss", "Camembert"});
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84 %! colormap ([1,0,0;0,1,0;0,0,1;1,1,0;1,0,1;0,1,1]);
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85 %! axis ([-2,2,-2,2]);
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86 %! title ("missing slice");
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87