|
6303
|
1 ## Copyright (C) 2006 Michel D. Schmid |
|
|
2 ## |
|
|
3 ## This program is free software; you can redistribute it and/or modify it |
|
|
4 ## under the terms of the GNU General Public License as published by |
|
|
5 ## the Free Software Foundation; either version 2, or (at your option) |
|
|
6 ## any later version. |
|
|
7 ## |
|
|
8 ## OctPlot is distributed in the hope that it will be useful, but |
|
|
9 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
|
|
10 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
|
11 ## General Public License for more details. |
|
|
12 ## |
|
|
13 ## You should have received a copy of the GNU General Public License |
|
|
14 ## along with OctPlot; see the file COPYING. If not, write to the Free |
|
|
15 ## Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
|
|
16 ## 02111-1307, USA. |
|
|
17 |
|
|
18 ## -*- texinfo -*- |
|
|
19 ## @deftypefn {Function File} {@var{h} =} stem (@var{x}, @var{y}, @var{linespec}) |
|
|
20 ## Plot a stem graph and return the handles of hte line and marker |
|
|
21 ## objects used to draw the stems. The default color is @code{"r"} |
|
|
22 ## (red). The default line style is @code{"-"} and the default marker is |
|
|
23 ## @code{"o"}. |
|
|
24 ## |
|
|
25 ## For example, |
|
|
26 ## @example |
|
|
27 ## x = 1:10; |
|
|
28 ## stem (x); |
|
|
29 ## @end example |
|
|
30 ## @noindent |
|
|
31 ## plots 10 stems with hights from 1 to 10; |
|
|
32 ## |
|
|
33 ## @example |
|
|
34 ## x = 1:10; |
|
|
35 ## y = ones (1, length (x))*2.*x; |
|
|
36 ## stem (x, y); |
|
|
37 ## @end example |
|
|
38 ## @noindent |
|
|
39 ## plots 10 stems with hights from 2 to 20; |
|
|
40 ## |
|
|
41 ## @example |
|
|
42 ## x = 1:10; |
|
|
43 ## y = ones (size (x))*2.*x; |
|
|
44 ## h = stem (x, y, "b"); |
|
|
45 ## @end example |
|
|
46 ## @noindent |
|
|
47 ## plots 10 bars with hights from 2 to 20 |
|
|
48 ## (the color is blue, and @var{h} is a 2-by-10 array of handles in |
|
|
49 ## which the first row holds the line handles and the |
|
|
50 ## the second row holds the marker handles); |
|
|
51 ## |
|
|
52 ## @example |
|
|
53 ## x = 1:10; |
|
|
54 ## y = ones (size (x))*2.*x; |
|
|
55 ## h = stem (x, y, "-.k"); |
|
|
56 ## @end example |
|
|
57 ## @noindent |
|
|
58 ## plots 10 stems with hights from 2 to 20 |
|
|
59 ## (the color is black, line style is @code{"-."}, and @var{h} is a 2-by-10 |
|
|
60 ## array of handles in which the first row holds the line handles and |
|
|
61 ## the second rows holds the marker handles); |
|
|
62 ## |
|
|
63 ## @example |
|
|
64 ## x = 1:10; |
|
|
65 ## y = ones (size (x))*2.*x; |
|
|
66 ## h = stem (x, y, "-.k."); |
|
|
67 ## @end example |
|
|
68 ## @noindent |
|
|
69 ## plots 10 stems with hights from 2 to 20 |
|
|
70 ## (the color is black, line style is @code{"-."} and the marker style |
|
|
71 ## is @code{"."}, and @var{h} is a 2-by-10 array of handles in which the |
|
|
72 ## first row holds the line handles and the second row holds the marker |
|
|
73 ## handles); |
|
|
74 ## |
|
|
75 ## @example |
|
|
76 ## x = 1:10; |
|
|
77 ## y = ones (size (x))*2.*x; |
|
|
78 ## h = stem (x, y, "fill"); |
|
|
79 ## @end example |
|
|
80 ## @noindent |
|
|
81 ## plots 10 stems with hights from 2 to 20 |
|
|
82 ## (the color is rgb-triple defined, the line style is @code{"-"}, |
|
|
83 ## the marker style is @code{"o"}, and @var{h} is a 2-by-10 array of |
|
|
84 ## handles in which the first row holds the line handles and the second |
|
|
85 ## row holds the marker handles). |
|
|
86 ## |
|
|
87 ## Color definitions with rgb-triples are not valid! |
|
|
88 ## |
|
|
89 ## @seealso{bar, barh, plot} |
|
|
90 ## @end deftypefn |
|
|
91 |
|
|
92 ## Author: Michel D. Schmid <michaelschmid@users.sourceforge.net> |
|
|
93 ## Adapted-by: jwe |
|
|
94 |
|
|
95 function h = stem (varargin) |
|
|
96 |
|
|
97 if (nargin < 1 || nargin > 4) |
|
|
98 print_usage (); |
|
|
99 endif |
|
|
100 |
|
|
101 [x, y, dofill, lc, ls, mc, ms] = check_stem_arg (varargin{:}); |
|
|
102 |
|
|
103 newplot (); |
|
|
104 |
|
|
105 ## first, plot the lines.. without marker |
|
|
106 ## Use a loop and calls to line here because setting properties this |
|
|
107 ## way doesn't work with plot yet. |
|
|
108 idxhh = 0; |
|
|
109 for i = 1:numel(x) |
|
|
110 hh(++idxhh) = line ([x(i); x(i)], [0; y(i)], "color", lc, "linestyle", ls); |
|
|
111 endfor |
|
|
112 |
|
|
113 ## second, plot the markers.. |
|
|
114 hhh = []; |
|
|
115 hhhh = []; |
|
|
116 |
|
|
117 ## Use a loop and calls to line here because setting properties this |
|
|
118 ## way doesn't work with plot yet. |
|
|
119 idxhhh = 0; |
|
|
120 for i = 1:numel(x) |
|
|
121 hhh(++idxhhh) = line ([x(i); x(i)], [y(i); y(i)]); |
|
|
122 endfor |
|
|
123 |
|
|
124 if (find (y < 0)) |
|
|
125 x_axis_range = get (gca, "xlim"); |
|
|
126 hhhh = line (x_axis_range, [0, 0], "color", "k"); |
|
|
127 endif |
|
|
128 |
|
|
129 if (dofill) |
|
|
130 set (hhh, "markerfacecolor", mc); |
|
|
131 endif |
|
|
132 |
|
|
133 if (nargout > 0) |
|
|
134 if (! isempty (hhhh)) |
|
|
135 hhhh = hhhh*(ones (length (hh), 1))'; |
|
|
136 endif |
|
|
137 h = [hh; hhh; hhhh]; |
|
|
138 endif |
|
|
139 |
|
|
140 endfunction |
|
|
141 |
|
|
142 function [x, y, dofill, lc, ls, mc, ms] = check_stem_arg (varargin) |
|
|
143 |
|
|
144 ## set specifiers to default values |
|
|
145 [lc, ls, mc, ms] = set_default_values (); |
|
|
146 dofill = 0; |
|
|
147 fill_2 = 0; |
|
|
148 linespec_2 = 0; |
|
|
149 |
|
|
150 ## check input arguments |
|
|
151 if (nargin == 1) |
|
|
152 y = varargin{1}; |
|
|
153 if (isvector (y)) |
|
|
154 x = 1:length(y); |
|
|
155 elseif (ismatrix (y)) |
|
|
156 x = 1:rows(y); |
|
|
157 else |
|
|
158 error ("stem: Y must be a matrix"); |
|
|
159 endif # in each case, x & y will be defined |
|
|
160 |
|
|
161 elseif (nargin == 2) |
|
|
162 ## several possibilities |
|
|
163 ## 1. the real y data |
|
|
164 ## 2. 'fill' |
|
|
165 ## 3. line spec |
|
|
166 if (ischar (varargin{2})) |
|
|
167 ## only 2. or 3. possible |
|
|
168 if (strcmp ("fill", varargin{2})) |
|
|
169 dofill = 1; |
|
|
170 else |
|
|
171 ## parse the linespec |
|
|
172 [lc, ls, mc, ms] = stem_line_spec (varargin{2}); |
|
|
173 endif |
|
|
174 y = varargin{1}; |
|
|
175 if (isvector (y)) |
|
|
176 x = 1:length(y); |
|
|
177 elseif (ismatrix (y)) |
|
|
178 x = 1:rows(y); |
|
|
179 else |
|
|
180 error ("stem: Y must be a matrix"); |
|
|
181 endif # in each case, x & y will be defined |
|
|
182 else |
|
|
183 ## must be the real y data |
|
|
184 x = varargin{1}; |
|
|
185 y = varargin{2}; |
|
|
186 if (! (ismatrix (x) && ismatrix (y))) |
|
|
187 error ("stem: X and Y must be matrices"); |
|
|
188 endif |
|
|
189 endif |
|
|
190 elseif (nargin == 3) |
|
|
191 ## again several possibilities |
|
|
192 ## arg2 1. real y |
|
|
193 ## arg2 2. 'fill' or linespec |
|
|
194 ## arg3 1. 'fill' or linespec |
|
|
195 if (ischar (varargin{2})) |
|
|
196 ## only arg2 2. / arg3 1. & arg3 3. are possible |
|
|
197 if (strcmp ("fill", varargin{2})) |
|
|
198 dofill = 1; |
|
|
199 fill_2 = 1; # be sure, no second "fill" is in the arguments |
|
|
200 else |
|
|
201 ## must be a linespec |
|
|
202 [lc, ls, mc, ms] = stem_line_spec (varargin{2}); |
|
|
203 linespec_2 = 1; |
|
|
204 endif |
|
|
205 y = varargin{1}; |
|
|
206 if (isvector (y)) |
|
|
207 x = 1:length(y); |
|
|
208 elseif (ismatrix (y)) |
|
|
209 x = 1:size(y,1); |
|
|
210 else |
|
|
211 error ("stem: Y must be a matrix"); |
|
|
212 endif # in each case, x & y will be defined |
|
|
213 else |
|
|
214 ## must be the real y data |
|
|
215 x = varargin{1}; |
|
|
216 y = varargin{2}; |
|
|
217 if (! (ismatrix (x) && ismatrix (y))) |
|
|
218 error ("stem: X and Y must be matrices"); |
|
|
219 endif |
|
|
220 endif # if ischar(varargin{2}) |
|
|
221 ## varargin{3} must be char... |
|
|
222 ## check for "fill" .. |
|
|
223 if (strcmp ("fill", varargin{3}) & fill_2) |
|
|
224 error ("stem:check_stem_arg: duplicate fill argument"); |
|
|
225 elseif (strcmp("fill", varargin{3}) & linespec_2) |
|
|
226 # must be "fill" |
|
|
227 dofill = 1; |
|
|
228 fill_2 = 1; |
|
|
229 elseif (strcmp ("fill", varargin{3}) & ! linespec_2) |
|
|
230 ## must be "fill" |
|
|
231 dofill = 1; |
|
|
232 fill_2 = 1; |
|
|
233 elseif (! linespec_2) |
|
|
234 ## must be linespec |
|
|
235 [lc, ls, mc, ms] = stem_line_spec (varargin{3}); |
|
|
236 linespec_2 = 1; |
|
|
237 endif |
|
|
238 elseif (nargin == 4) |
|
|
239 x = varargin{1}; |
|
|
240 y = varargin{2}; |
|
|
241 if (! (ismatrix (x) && ismatrix (y))) |
|
|
242 error ("X and Y must be matrices"); |
|
|
243 endif |
|
|
244 |
|
|
245 if (strcmp ("fill", varargin{3})) |
|
|
246 dofill = 1; |
|
|
247 fill_2 = 1; # be sure, no second "fill" is in the arguments |
|
|
248 else |
|
|
249 ## must be a linespec |
|
|
250 [lc, ls, mc, ms] = stem_line_spec (varargin{3}); |
|
|
251 linespec_2 = 1; |
|
|
252 endif |
|
|
253 |
|
|
254 ## check for "fill" .. |
|
|
255 if (strcmp ("fill", varargin{4}) & fill_2) |
|
|
256 error ("stem:check_stem_arg: duplicate fill argument"); |
|
|
257 elseif (strcmp ("fill", varargin{4}) & linespec_2) |
|
|
258 ## must be "fill" |
|
|
259 dofill = 1; |
|
|
260 fill_2 = 1; |
|
|
261 elseif (! strcmp ("fill", varargin{4}) & ! linespec_2) |
|
|
262 ## must be linespec |
|
|
263 [lc, ls, mc, ms] = stem_line_spec (varargin{4}); |
|
|
264 linespec_2 = 1; |
|
|
265 endif |
|
|
266 endif |
|
|
267 |
|
|
268 endfunction |
|
|
269 |
|
|
270 function [lc, ls, mc, ms] = stem_line_spec (str) |
|
|
271 if (! ischar (str)) |
|
|
272 error ("stem:stem_line_spec: wrong argument type, must be \"fill\" or a string of specifiers"); |
|
|
273 endif |
|
|
274 [lc, ls, mc, ms] = set_default_values (); |
|
|
275 ## Parse the line specifier string. |
|
|
276 cur_props = __pltopt__ ("stem", str); |
|
|
277 for i = 1:length(cur_props) |
|
|
278 if (isfield (cur_props(i), "markeredgecolor")) |
|
|
279 mc = cur_props(i).markeredgecolor; |
|
|
280 elseif (isfield (cur_props(i), "color")); # means line color |
|
|
281 lc = cur_props(i).color; |
|
|
282 elseif (isfield (cur_props(i), "linestyle")) |
|
|
283 ls = cur_props(i).linestyle; |
|
|
284 elseif (isfield (cur_props(i), "marker")) |
|
|
285 ms = cur_props(i).marker; |
|
|
286 endif |
|
|
287 endfor |
|
|
288 endfunction |
|
|
289 |
|
|
290 function [lc, ls, mc, ms] = set_default_values () |
|
|
291 ## set default values |
|
|
292 mc = "r"; |
|
|
293 lc = "r"; |
|
|
294 ls = "-"; |
|
|
295 ms = "o"; |
|
|
296 endfunction |
