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maint: Periodic merge of gui-release to default.
author John W. Eaton <jwe@octave.org>
date Tue, 20 Jan 2015 10:24:46 -0500
parents 9ac2357f19bc 446c46af4b42
children 4197fc428c7d
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d63878346099 maint: Update copyright notices for release.
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1 ## Copyright (C) 2007-2013 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 (@dots{}, @var{explode})
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22 ## @deftypefnx {Function File} {} pie (@dots{}, @var{labels})
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23 ## @deftypefnx {Function File} {} pie (@var{hax}, @dots{});
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24 ## @deftypefnx {Function File} {@var{h} =} pie (@dots{});
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25 ## Plot a 2-D pie chart.
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26 ##
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27 ## When called with a single vector argument, produce a pie chart of the
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28 ## elements in @var{x}. The size of the ith slice is the percentage that the
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29 ## element @var{x}i represents of the total sum of @var{x}:
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30 ## @code{pct = @var{x}(i) / sum (@var{x})}.
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31 ##
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32 ## The optional input @var{explode} is a vector of the same length as @var{x}
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33 ## that, if nonzero, "explodes" the slice from the pie chart.
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34 ##
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35 ## The optional input @var{labels} is a cell array of strings of the same
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36 ## length as @var{x} specifying the label for each slice.
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37 ##
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38 ## If the first argument @var{hax} is an axes handle, then plot into this axis,
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39 ## rather than the current axes returned by @code{gca}.
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40 ##
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41 ## The optional return value @var{h} is a list of handles to the patch
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42 ## and text objects generating the plot.
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43 ##
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44 ## Note: If @code{sum (@var{x}) @leq{} 1} then the elements of @var{x} are
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45 ## interpreted as percentages directly and are not normalized by @code{sum (x)}.
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46 ## Furthermore, if the sum is less than 1 then there will be a missing slice
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47 ## in the pie plot to represent the missing, unspecified percentage.
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48 ##
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49 ## @seealso{pie3, bar, hist, rose}
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50 ## @end deftypefn
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51
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52 ## Very roughly based on pie.m from octave-forge whose author was
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53 ## Daniel Heiserer <Daniel.heiserer@physik.tu-muenchen.de>
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54
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55 function h = pie (varargin)
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56
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57 [hax, varargin, nargin] = __plt_get_axis_arg__ ("pie", varargin{:});
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58
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59 if (nargin < 1)
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60 print_usage ();
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61 endif
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62
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63 oldfig = [];
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64 if (! isempty (hax))
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65 oldfig = get (0, "currentfigure");
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66 endif
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67 unwind_protect
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68 hax = newplot (hax);
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69 htmp = __pie__ ("pie", hax, varargin{:});
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70 unwind_protect_cleanup
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71 if (! isempty (oldfig))
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72 set (0, "currentfigure", oldfig);
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73 endif
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74 end_unwind_protect
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75
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76 if (nargout > 0)
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77 h = htmp;
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78 endif
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79
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80 endfunction
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81
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82
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83 %!demo
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84 %! clf;
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85 %! pie ([3, 2, 1], [0, 0, 1]);
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86 %! colormap ([1,0,0;0,1,0;0,0,1;1,1,0;1,0,1;0,1,1]);
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87 %! title ('pie() with exploded wedge');
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88
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89 %!demo
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90 %! clf;
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91 %! pie ([3, 2, 1], [0, 0, 1], {'Cheddar', 'Swiss', 'Camembert'});
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92 %! colormap ([1,0,0;0,1,0;0,0,1;1,1,0;1,0,1;0,1,1]);
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93 %! axis ([-2,2,-2,2]);
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94 %! title ('pie() with labels');
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95
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96
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97 %!demo
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98 %! clf;
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99 %! pie ([0.17, 0.34, 0.41], {'Cheddar', 'Swiss', 'Camembert'});
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100 %! colormap ([1,0,0;0,1,0;0,0,1;1,1,0;1,0,1;0,1,1]);
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101 %! axis ([-2,2,-2,2]);
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102 %! title ('pie() with missing slice');
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103