{{ message }}
-
Notifications
You must be signed in to change notification settings - Fork 62
Expand file tree
/
Copy pathcolorbar_only.html
More file actions
227 lines (202 loc) · 19 KB
/
Copy pathcolorbar_only.html
File metadata and controls
227 lines (202 loc) · 19 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>api example code: colorbar_only.py — Matplotlib 1.3.0 documentation</title>
<link rel="stylesheet" href="../../_static/mpl.css" type="text/css" />
<link rel="stylesheet" href="../../_static/pygments.css" type="text/css" />
<script type="text/javascript">
var DOCUMENTATION_OPTIONS = {
URL_ROOT: '../../',
VERSION: '1.3.0',
COLLAPSE_INDEX: false,
FILE_SUFFIX: '.html',
HAS_SOURCE: true
};
</script>
<script type="text/javascript" src="../../_static/jquery.js"></script>
<script type="text/javascript" src="../../_static/underscore.js"></script>
<script type="text/javascript" src="../../_static/doctools.js"></script>
<link rel="search" type="application/opensearchdescription+xml"
title="Search within Matplotlib 1.3.0 documentation"
href="../../_static/opensearch.xml"/>
<link rel="top" title="Matplotlib 1.3.0 documentation" href="../../index.html" />
<link rel="canonical" href="https://matplotlib.org/2.0.2/examples/api/colorbar_only.html" />
<script data-domain="matplotlib.org" defer="defer" src="https://views.scientific-python.org/js/script.js"></script>
</head>
<body>
<div id="unreleased-message"> You are reading an old version of the documentation (v1.3.0). For the latest version see <a href="/stable/">https://matplotlib.org/stable/</a> </div>
<!-- Piwik -->
<script type="text/javascript">
if ("matplotlib.sourceforge.net" == document.location.hostname ||
"matplotlib.sf.net" == document.location.hostname) {
var pkBaseURL = (("https:" == document.location.protocol) ? "https://apps.sourceforge.net/piwik/matplotlib/" : "http://apps.sourceforge.net/piwik/matplotlib/");
document.write(unescape("%3Cscript src='" + pkBaseURL + "piwik.js' type='text/javascript'%3E%3C/script%3E"));
}
</script>
<script type="text/javascript">
if ("matplotlib.sourceforge.net" == document.location.hostname ||
"matplotlib.sf.net" == document.location.hostname) {
piwik_action_name = '';
piwik_idsite = 1;
piwik_url = pkBaseURL + "piwik.php";
piwik_log(piwik_action_name, piwik_idsite, piwik_url);
document.write(unescape('%3Cobject%3E%3Cnoscript%3E%3Cp%3E%3Cimg src="http://apps.sourceforge.net/piwik/matplotlib/piwik.php?idsite=1" alt="piwik"/%3E%3C/p%3E%3C/noscript%3E%3C/object%3E'));
}
</script>
<!-- End Piwik Tag -->
<link rel="shortcut icon" href="_static/favicon.ico">
<!-- The "Fork me on github" ribbon -->
<img style="float: right; margin-bottom: -40px; top: 0; right: 0; border: 0;" src="https://s3.amazonaws.com/github/ribbons/forkme_right_orange_ff7600.png" usemap="#ribbonmap"/>
<map name="ribbonmap">
<area shape="poly" coords="15,0,148,-1,148,135" href="https://github.com/matplotlib/matplotlib" title="Fork me on GitHub" />
</map>
<div style="background-color: white; text-align: left; padding: 10px 10px 15px 15px">
<a href="../../index.html"><img src="../../_static/logo2.png" border="0" alt="matplotlib"/></a>
</div>
<div class="related">
<h3>Navigation</h3>
<ul>
<li class="right" style="margin-right: 10px">
<a href="../../genindex.html" title="General Index"
accesskey="I">index</a></li>
<li class="right" >
<a href="../../py-modindex.html" title="Python Module Index"
>modules</a> |</li>
<li><a href="../../index.html">home</a>| </li>
<li><a href="../index.html">examples</a>| </li>
<li><a href="../../gallery.html">gallery</a>| </li>
<li><a href="../../api/pyplot_summary.html">pyplot</a>| </li>
<li><a href="../../contents.html">docs</a> »</li>
</ul>
</div>
<div class="sphinxsidebar">
<div class="sphinxsidebarwrapper">
<h3>This Page</h3>
<ul class="this-page-menu">
<li><a href="../../_sources/examples/api/colorbar_only.txt"
rel="nofollow">Show Source</a></li>
</ul>
<div id="searchbox" style="display: none">
<h3>Quick search</h3>
<form class="search" action="../../search.html" method="get">
<input type="text" name="q" />
<input type="submit" value="Go" />
<input type="hidden" name="check_keywords" value="yes" />
<input type="hidden" name="area" value="default" />
</form>
<p class="searchtip" style="font-size: 90%">
Enter search terms or a module, class or function name.
</p>
</div>
<script type="text/javascript">$('#searchbox').show(0);</script>
</div>
</div>
<div class="document">
<div class="documentwrapper">
<div class="bodywrapper">
<div class="body">
<div class="section" id="api-example-code-colorbar-only-py">
<span id="api-colorbar-only"></span><h1>api example code: colorbar_only.py<a class="headerlink" href="#api-example-code-colorbar-only-py" title="Permalink to this headline">¶</a></h1>
<p>(<a class="reference external" href="../../mpl_examples/api/colorbar_only.py">Source code</a>, <a class="reference external" href="../../mpl_examples/api/colorbar_only.png">png</a>, <a class="reference external" href="../../mpl_examples/api/colorbar_only.hires.png">hires.png</a>, <a class="reference external" href="../../mpl_examples/api/colorbar_only.pdf">pdf</a>)</p>
<div class="figure">
<img alt="../../_images/colorbar_only.png" src="../../_images/colorbar_only.png" />
</div>
<div class="highlight-python"><div class="highlight"><pre><span class="sd">'''</span>
<span class="sd">Make a colorbar as a separate figure.</span>
<span class="sd">'''</span>
<span class="kn">from</span> <span class="nn">matplotlib</span> <span class="kn">import</span> <span class="n">pyplot</span>
<span class="kn">import</span> <span class="nn">matplotlib</span> <span class="kn">as</span> <span class="nn">mpl</span>
<span class="c"># Make a figure and axes with dimensions as desired.</span>
<span class="n">fig</span> <span class="o">=</span> <span class="n">pyplot</span><span class="o">.</span><span class="n">figure</span><span class="p">(</span><span class="n">figsize</span><span class="o">=</span><span class="p">(</span><span class="mi">8</span><span class="p">,</span><span class="mi">3</span><span class="p">))</span>
<span class="n">ax1</span> <span class="o">=</span> <span class="n">fig</span><span class="o">.</span><span class="n">add_axes</span><span class="p">([</span><span class="mf">0.05</span><span class="p">,</span> <span class="mf">0.80</span><span class="p">,</span> <span class="mf">0.9</span><span class="p">,</span> <span class="mf">0.15</span><span class="p">])</span>
<span class="n">ax2</span> <span class="o">=</span> <span class="n">fig</span><span class="o">.</span><span class="n">add_axes</span><span class="p">([</span><span class="mf">0.05</span><span class="p">,</span> <span class="mf">0.475</span><span class="p">,</span> <span class="mf">0.9</span><span class="p">,</span> <span class="mf">0.15</span><span class="p">])</span>
<span class="n">ax3</span> <span class="o">=</span> <span class="n">fig</span><span class="o">.</span><span class="n">add_axes</span><span class="p">([</span><span class="mf">0.05</span><span class="p">,</span> <span class="mf">0.15</span><span class="p">,</span> <span class="mf">0.9</span><span class="p">,</span> <span class="mf">0.15</span><span class="p">])</span>
<span class="c"># Set the colormap and norm to correspond to the data for which</span>
<span class="c"># the colorbar will be used.</span>
<span class="n">cmap</span> <span class="o">=</span> <span class="n">mpl</span><span class="o">.</span><span class="n">cm</span><span class="o">.</span><span class="n">cool</span>
<span class="n">norm</span> <span class="o">=</span> <span class="n">mpl</span><span class="o">.</span><span class="n">colors</span><span class="o">.</span><span class="n">Normalize</span><span class="p">(</span><span class="n">vmin</span><span class="o">=</span><span class="mi">5</span><span class="p">,</span> <span class="n">vmax</span><span class="o">=</span><span class="mi">10</span><span class="p">)</span>
<span class="c"># ColorbarBase derives from ScalarMappable and puts a colorbar</span>
<span class="c"># in a specified axes, so it has everything needed for a</span>
<span class="c"># standalone colorbar. There are many more kwargs, but the</span>
<span class="c"># following gives a basic continuous colorbar with ticks</span>
<span class="c"># and labels.</span>
<span class="n">cb1</span> <span class="o">=</span> <span class="n">mpl</span><span class="o">.</span><span class="n">colorbar</span><span class="o">.</span><span class="n">ColorbarBase</span><span class="p">(</span><span class="n">ax1</span><span class="p">,</span> <span class="n">cmap</span><span class="o">=</span><span class="n">cmap</span><span class="p">,</span>
<span class="n">norm</span><span class="o">=</span><span class="n">norm</span><span class="p">,</span>
<span class="n">orientation</span><span class="o">=</span><span class="s">'horizontal'</span><span class="p">)</span>
<span class="n">cb1</span><span class="o">.</span><span class="n">set_label</span><span class="p">(</span><span class="s">'Some Units'</span><span class="p">)</span>
<span class="c"># The second example illustrates the use of a ListedColormap, a</span>
<span class="c"># BoundaryNorm, and extended ends to show the "over" and "under"</span>
<span class="c"># value colors.</span>
<span class="n">cmap</span> <span class="o">=</span> <span class="n">mpl</span><span class="o">.</span><span class="n">colors</span><span class="o">.</span><span class="n">ListedColormap</span><span class="p">([</span><span class="s">'r'</span><span class="p">,</span> <span class="s">'g'</span><span class="p">,</span> <span class="s">'b'</span><span class="p">,</span> <span class="s">'c'</span><span class="p">])</span>
<span class="n">cmap</span><span class="o">.</span><span class="n">set_over</span><span class="p">(</span><span class="s">'0.25'</span><span class="p">)</span>
<span class="n">cmap</span><span class="o">.</span><span class="n">set_under</span><span class="p">(</span><span class="s">'0.75'</span><span class="p">)</span>
<span class="c"># If a ListedColormap is used, the length of the bounds array must be</span>
<span class="c"># one greater than the length of the color list. The bounds must be</span>
<span class="c"># monotonically increasing.</span>
<span class="n">bounds</span> <span class="o">=</span> <span class="p">[</span><span class="mi">1</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">4</span><span class="p">,</span> <span class="mi">7</span><span class="p">,</span> <span class="mi">8</span><span class="p">]</span>
<span class="n">norm</span> <span class="o">=</span> <span class="n">mpl</span><span class="o">.</span><span class="n">colors</span><span class="o">.</span><span class="n">BoundaryNorm</span><span class="p">(</span><span class="n">bounds</span><span class="p">,</span> <span class="n">cmap</span><span class="o">.</span><span class="n">N</span><span class="p">)</span>
<span class="n">cb2</span> <span class="o">=</span> <span class="n">mpl</span><span class="o">.</span><span class="n">colorbar</span><span class="o">.</span><span class="n">ColorbarBase</span><span class="p">(</span><span class="n">ax2</span><span class="p">,</span> <span class="n">cmap</span><span class="o">=</span><span class="n">cmap</span><span class="p">,</span>
<span class="n">norm</span><span class="o">=</span><span class="n">norm</span><span class="p">,</span>
<span class="c"># to use 'extend', you must</span>
<span class="c"># specify two extra boundaries:</span>
<span class="n">boundaries</span><span class="o">=</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">+</span><span class="n">bounds</span><span class="o">+</span><span class="p">[</span><span class="mi">13</span><span class="p">],</span>
<span class="n">extend</span><span class="o">=</span><span class="s">'both'</span><span class="p">,</span>
<span class="n">ticks</span><span class="o">=</span><span class="n">bounds</span><span class="p">,</span> <span class="c"># optional</span>
<span class="n">spacing</span><span class="o">=</span><span class="s">'proportional'</span><span class="p">,</span>
<span class="n">orientation</span><span class="o">=</span><span class="s">'horizontal'</span><span class="p">)</span>
<span class="n">cb2</span><span class="o">.</span><span class="n">set_label</span><span class="p">(</span><span class="s">'Discrete intervals, some other units'</span><span class="p">)</span>
<span class="c"># The third example illustrates the use of custom length colorbar</span>
<span class="c"># extensions, used on a colorbar with discrete intervals.</span>
<span class="n">cmap</span> <span class="o">=</span> <span class="n">mpl</span><span class="o">.</span><span class="n">colors</span><span class="o">.</span><span class="n">ListedColormap</span><span class="p">([[</span><span class="mf">0.</span><span class="p">,</span> <span class="o">.</span><span class="mi">4</span><span class="p">,</span> <span class="mf">1.</span><span class="p">],</span> <span class="p">[</span><span class="mf">0.</span><span class="p">,</span> <span class="o">.</span><span class="mi">8</span><span class="p">,</span> <span class="mf">1.</span><span class="p">],</span>
<span class="p">[</span><span class="mf">1.</span><span class="p">,</span> <span class="o">.</span><span class="mi">8</span><span class="p">,</span> <span class="mf">0.</span><span class="p">],</span> <span class="p">[</span><span class="mf">1.</span><span class="p">,</span> <span class="o">.</span><span class="mi">4</span><span class="p">,</span> <span class="mf">0.</span><span class="p">]])</span>
<span class="n">cmap</span><span class="o">.</span><span class="n">set_over</span><span class="p">((</span><span class="mf">1.</span><span class="p">,</span> <span class="mf">0.</span><span class="p">,</span> <span class="mf">0.</span><span class="p">))</span>
<span class="n">cmap</span><span class="o">.</span><span class="n">set_under</span><span class="p">((</span><span class="mf">0.</span><span class="p">,</span> <span class="mf">0.</span><span class="p">,</span> <span class="mf">1.</span><span class="p">))</span>
<span class="n">bounds</span> <span class="o">=</span> <span class="p">[</span><span class="o">-</span><span class="mf">1.</span><span class="p">,</span> <span class="o">-.</span><span class="mi">5</span><span class="p">,</span> <span class="mf">0.</span><span class="p">,</span> <span class="o">.</span><span class="mi">5</span><span class="p">,</span> <span class="mf">1.</span><span class="p">]</span>
<span class="n">norm</span> <span class="o">=</span> <span class="n">mpl</span><span class="o">.</span><span class="n">colors</span><span class="o">.</span><span class="n">BoundaryNorm</span><span class="p">(</span><span class="n">bounds</span><span class="p">,</span> <span class="n">cmap</span><span class="o">.</span><span class="n">N</span><span class="p">)</span>
<span class="n">cb3</span> <span class="o">=</span> <span class="n">mpl</span><span class="o">.</span><span class="n">colorbar</span><span class="o">.</span><span class="n">ColorbarBase</span><span class="p">(</span><span class="n">ax3</span><span class="p">,</span> <span class="n">cmap</span><span class="o">=</span><span class="n">cmap</span><span class="p">,</span>
<span class="n">norm</span><span class="o">=</span><span class="n">norm</span><span class="p">,</span>
<span class="n">boundaries</span><span class="o">=</span><span class="p">[</span><span class="o">-</span><span class="mi">10</span><span class="p">]</span><span class="o">+</span><span class="n">bounds</span><span class="o">+</span><span class="p">[</span><span class="mi">10</span><span class="p">],</span>
<span class="n">extend</span><span class="o">=</span><span class="s">'both'</span><span class="p">,</span>
<span class="c"># Make the length of each extension</span>
<span class="c"># the same as the length of the</span>
<span class="c"># interior colors:</span>
<span class="n">extendfrac</span><span class="o">=</span><span class="s">'auto'</span><span class="p">,</span>
<span class="n">ticks</span><span class="o">=</span><span class="n">bounds</span><span class="p">,</span>
<span class="n">spacing</span><span class="o">=</span><span class="s">'uniform'</span><span class="p">,</span>
<span class="n">orientation</span><span class="o">=</span><span class="s">'horizontal'</span><span class="p">)</span>
<span class="n">cb3</span><span class="o">.</span><span class="n">set_label</span><span class="p">(</span><span class="s">'Custom extension lengths, some other units'</span><span class="p">)</span>
<span class="n">pyplot</span><span class="o">.</span><span class="n">show</span><span class="p">()</span>
</pre></div>
</div>
<p>Keywords: python, matplotlib, pylab, example, codex (see <a class="reference internal" href="../../faq/howto_faq.html#how-to-search-examples"><em>Search examples</em></a>)</p>
</div>
</div>
</div>
</div>
<div class="clearer"></div>
</div>
<div class="related">
<h3>Navigation</h3>
<ul>
<li class="right" style="margin-right: 10px">
<a href="../../genindex.html" title="General Index"
>index</a></li>
<li class="right" >
<a href="../../py-modindex.html" title="Python Module Index"
>modules</a> |</li>
<li><a href="../../index.html">home</a>| </li>
<li><a href="../index.html">examples</a>| </li>
<li><a href="../../gallery.html">gallery</a>| </li>
<li><a href="../../api/pyplot_summary.html">pyplot</a>| </li>
<li><a href="../../contents.html">docs</a> »</li>
</ul>
</div>
<div class="footer">
© Copyright 2002 - 2012 John Hunter, Darren Dale, Eric Firing, Michael Droettboom and the matplotlib development team; 2012 - 2013 The matplotlib development team.
Last updated on Jul 31, 2013.
Created using <a href="http://sphinx-doc.org/">Sphinx</a> 1.2b1.
</div>
</body>
</html>
You can’t perform that action at this time.