annotate scripts/plot/draw/pie.m @ 33670:9dd2a8e7e0d5 default tip @

uifigure.m: Make sure variable exists before it is used (bug #65459). * scripts/gui/uifigure.m: The variable "props" might have been used before it existed. Make sure it exists for all code paths.
author Markus Mützel <markus.muetzel@gmx.de>
date Mon, 24 Jun 2024 10:29:15 +0200
parents 2e484f9f1f18
children
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1 ########################################################################
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2 ##
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3 ## Copyright (C) 2007-2024 The Octave Project Developers
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4 ##
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5 ## See the file COPYRIGHT.md in the top-level directory of this
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6 ## distribution or <https://octave.org/copyright/>.
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7 ##
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8 ## This file is part of Octave.
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9 ##
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10 ## Octave is free software: you can redistribute it and/or modify it
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11 ## under the terms of the GNU General Public License as published by
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12 ## the Free Software Foundation, either version 3 of the License, or
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13 ## (at your option) any later version.
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14 ##
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15 ## Octave is distributed in the hope that it will be useful, but
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16 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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17 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 ## GNU General Public License for more details.
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19 ##
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20 ## You should have received a copy of the GNU General Public License
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21 ## along with Octave; see the file COPYING. If not, see
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22 ## <https://www.gnu.org/licenses/>.
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23 ##
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24 ########################################################################
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25
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26 ## -*- texinfo -*-
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27 ## @deftypefn {} {} pie (@var{x})
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28 ## @deftypefnx {} {} pie (@dots{}, @var{explode})
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29 ## @deftypefnx {} {} pie (@dots{}, @var{labels})
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30 ## @deftypefnx {} {} pie (@var{hax}, @dots{})
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31 ## @deftypefnx {} {@var{h} =} pie (@dots{})
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32 ## Plot a 2-D pie chart.
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33 ##
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34 ## When called with a single vector argument, produce a pie chart of the
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35 ## elements in @var{x}. The size of the ith slice is the percentage that the
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36 ## element @var{x}i represents of the total sum of @var{x}:
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37 ## @code{pct = @var{x}(i) / sum (@var{x})}.
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38 ##
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39 ## The optional input @var{explode} is a vector of the same length as @var{x}
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40 ## that, if nonzero, "explodes" the slice from the pie chart.
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41 ##
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42 ## The optional input @var{labels} is a cell array of strings of the same
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43 ## length as @var{x} specifying the label for each slice.
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44 ##
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45 ## If the first argument @var{hax} is an axes handle, then plot into this axes,
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46 ## rather than the current axes returned by @code{gca}.
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47 ##
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48 ## The optional return value @var{h} is a list of handles to the patch
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49 ## and text objects generating the plot.
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50 ##
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51 ## Note: If @code{sum (@var{x}) @leq{} 1} then the elements of @var{x} are
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52 ## interpreted as percentages directly and are not normalized by @code{sum
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53 ## (x)}. Furthermore, if the sum is less than 1 then there will be a missing
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54 ## slice in the pie plot to represent the missing, unspecified percentage.
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55 ##
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56 ## @seealso{pie3, bar, hist, rose}
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57 ## @end deftypefn
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58
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59 ## Very roughly based on pie.m from Octave Forge whose author was
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60 ## Daniel Heiserer <Daniel.heiserer@physik.tu-muenchen.de>
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61
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62 function h = pie (varargin)
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63
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64 [hax, varargin, nargin] = __plt_get_axis_arg__ ("pie", varargin{:});
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65
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66 if (nargin < 1)
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67 print_usage ();
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68 endif
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69
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70 if (! all (isfinite (varargin{1})))
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71 error ("pie: all data in X must be finite");
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72 endif
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73
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74 oldfig = [];
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75 if (! isempty (hax))
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76 oldfig = get (0, "currentfigure");
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77 endif
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78 unwind_protect
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79 hax = newplot (hax);
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80 htmp = __pie__ ("pie", hax, varargin{:});
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81 unwind_protect_cleanup
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82 if (! isempty (oldfig))
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83 set (0, "currentfigure", oldfig);
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84 endif
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85 end_unwind_protect
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86
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87 if (nargout > 0)
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88 h = htmp;
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89 endif
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90
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91 endfunction
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92
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93
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94 %!demo
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95 %! clf;
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96 %! pie ([3, 2, 1], [0, 0, 1]);
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97 %! colormap ([1,0,0;0,1,0;0,0,1;1,1,0;1,0,1;0,1,1]);
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98 %! title ("pie() with exploded wedge");
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99
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100 %!demo
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101 %! clf;
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102 %! pie ([3, 2, 1], [0, 0, 1], {"Cheddar", "Swiss", "Camembert"});
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103 %! colormap ([1,0,0;0,1,0;0,0,1;1,1,0;1,0,1;0,1,1]);
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104 %! axis ([-2,2,-2,2]);
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105 %! title ("pie() with labels");
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106
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107
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108 %!demo
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109 %! clf;
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110 %! pie ([0.17, 0.34, 0.41], {"Cheddar", "Swiss", "Camembert"});
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111 %! colormap ([1,0,0;0,1,0;0,0,1;1,1,0;1,0,1;0,1,1]);
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112 %! axis ([-2,2,-2,2]);
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113 %! title ("pie() with missing slice");
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114
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115 ## Test input validation
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116 %!error <Invalid call> pie ()
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117 %!error <all data in X must be finite> pie ([1 2 Inf])
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118 %!error <all data in X must be finite> pie ([1 2 NaN])