Mercurial > hg > octave-nkf
annotate scripts/plot/stem.m @ 10846:a4f482e66b65
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author | Rik <octave@nomad.inbox5.com> |
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date | Sun, 01 Aug 2010 20:22:17 -0700 |
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9245 | 1 ## Copyright (C) 2006, 2007, 2008, 2009 Michel D. Schmid |
6303 | 2 ## |
6440 | 3 ## This file is part of Octave. |
4 ## | |
5 ## Octave is free software; you can redistribute it and/or modify it | |
6303 | 6 ## under the terms of the GNU General Public License as published by |
7016 | 7 ## the Free Software Foundation; either version 3 of the License, or (at |
8 ## your option) any later version. | |
6303 | 9 ## |
6440 | 10 ## Octave is distributed in the hope that it will be useful, but |
6303 | 11 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 ## General Public License for more details. | |
14 ## | |
15 ## You should have received a copy of the GNU General Public License | |
7016 | 16 ## along with Octave; see the file COPYING. If not, see |
17 ## <http://www.gnu.org/licenses/>. | |
6303 | 18 |
19 ## -*- texinfo -*- | |
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20 ## @deftypefn {Function File} {} stem (@var{x}) |
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21 ## @deftypefnx {Function File} {} stem (@var{x}, @var{y}) |
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22 ## @deftypefnx {Function File} {} stem (@var{x}, @var{y}, @var{linespec}) |
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23 ## @deftypefnx {Function File} {} stem (@dots{}, "filled") |
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24 ## @deftypefnx {Function File} {@var{h} =} stem (@dots{}) |
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25 ## Plot a stem graph from two vectors of x-y data. If only one argument |
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26 ## is given, it is taken as the y-values and the x coordinates are taken |
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27 ## from the indices of the elements. |
6303 | 28 ## |
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29 ## If @var{y} is a matrix, then each column of the matrix is plotted as |
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30 ## a separate stem graph. In this case @var{x} can either be a vector, |
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31 ## the same length as the number of rows in @var{y}, or it can be a |
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32 ## matrix of the same size as @var{y}. |
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33 ## |
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34 ## The default color is @code{"b"} (blue). The default line style is |
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35 ## @code{"-"} and the default marker is @code{"o"}. The line style can |
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36 ## be altered by the @code{linespec} argument in the same manner as the |
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37 ## @code{plot} command. For example, |
6303 | 38 ## |
39 ## @example | |
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40 ## @group |
6303 | 41 ## x = 1:10; |
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42 ## y = ones (1, length (x))*2.*x; |
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43 ## stem (x, y, "r"); |
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44 ## @end group |
6303 | 45 ## @end example |
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46 ## |
6303 | 47 ## @noindent |
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48 ## plots 10 stems with heights from 2 to 20 in red; |
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49 ## |
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50 ## The return value of @code{stem} is a vector of "stem series" graphics |
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51 ## handles, with one handle per column of the variable @var{y}. This |
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52 ## handle regroups the elements of the stem graph together as the |
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53 ## children of the "stem series" handle, allowing them to be altered |
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54 ## together. For example, |
6303 | 55 ## |
56 ## @example | |
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57 ## @group |
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58 ## x = [0 : 10]'; |
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59 ## y = [sin(x), cos(x)] |
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60 ## h = stem (x, y); |
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61 ## set (h(2), "color", "g"); |
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62 ## set (h(1), "basevalue", -1) |
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63 ## @end group |
6303 | 64 ## @end example |
65 ## | |
66 ## @noindent | |
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67 ## changes the color of the second "stem series" and moves the base line |
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68 ## of the first. |
6303 | 69 ## @seealso{bar, barh, plot} |
70 ## @end deftypefn | |
71 | |
72 ## Author: Michel D. Schmid <michaelschmid@users.sourceforge.net> | |
73 ## Adapted-by: jwe | |
74 | |
75 function h = stem (varargin) | |
76 | |
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77 if (nargin < 1) |
7218 | 78 print_usage (); |
79 endif | |
80 | |
7217 | 81 tmp = __stem__ (false, varargin{:}); |
6303 | 82 |
83 if (nargout > 0) | |
7217 | 84 h = tmp; |
6303 | 85 endif |
86 | |
87 endfunction | |
7245 | 88 |
89 %!demo | |
90 %! x = 1:10; | |
91 %! stem (x); | |
92 | |
93 %!demo | |
94 %! x = 1:10; | |
95 %! y = ones (1, length (x))*2.*x; | |
96 %! stem (x, y); | |
97 | |
98 %!demo | |
99 %! x = 1:10; | |
100 %! y = ones (size (x))*2.*x; | |
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101 %! h = stem (x, y, "r"); |
7245 | 102 |
103 %!demo | |
104 %! x = 1:10; | |
105 %! y = ones (size (x))*2.*x; | |
106 %! h = stem (x, y, "-.k"); | |
107 | |
108 %!demo | |
109 %! x = 1:10; | |
110 %! y = ones (size (x))*2.*x; | |
111 %! h = stem (x, y, "-.k."); | |
112 | |
113 %!demo | |
114 %! x = 1:10; | |
115 %! y = ones (size (x))*2.*x; | |
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116 %! h = stem (x, y, "filled"); |
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117 |
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118 %!demo |
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119 %! x = [0 : 10]'; |
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120 %! y = [sin(x), cos(x)]; |
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121 %! h = stem (x, y); |
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122 %! set (h(2), "color", "g"); |
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123 %! set (h(1), "basevalue", -1) |