matplotlib.github.com/1.4.1/examples/api/two_scales.html at main · matplotlib/matplotlib.github.com · GitHub

History

193 lines (159 loc) · 11.1 KB

Raw

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

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"

"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<head>

<title>api example code: two_scales.py — Matplotlib 1.4.1 documentation</title>

type="text/css" />

type="text/css" />

var DOCUMENTATION_OPTIONS = {

URL_ROOT: '../../',

VERSION: '1.4.1',

COLLAPSE_INDEX: false,

FILE_SUFFIX: '.html',

HAS_SOURCE: true

};

</script>

title="Search within Matplotlib 1.4.1 documentation"

href="../../_static/opensearch.xml"/>

</head>

<body>

<div id="unreleased-message"> You are reading an old version of the documentation (v1.4.1). For the latest version see <a href="/stable/">https://matplotlib.org/stable/</a> </div>

</map>

</div>

<h3>Navigation</h3>

<ul>

<a href="../../genindex.html" title="General Index"

accesskey="I">index</a></li>

<a href="../../py-modindex.html" title="Python Module Index"

>modules</a> |</li>

<a href="unicode_minus.html" title="api example code: unicode_minus.py"

accesskey="N">next</a> |</li>

<a href="span_regions.html" title="api example code: span_regions.py"

accesskey="P">previous</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="../index.html" >Matplotlib Examples</a> »</li>

<li><a href="index.html" accesskey="U">api Examples</a> »</li>

</ul>

</div>

<h4>Previous topic</h4>

<a href="span_regions.html"

title="previous chapter">api example code: span_regions.py</a>

<h4>Next topic</h4>

<a href="unicode_minus.html"

title="next chapter">api example code: unicode_minus.py</a>

<li><a href="../../_sources/examples/api/two_scales.txt"

rel="nofollow">Show Source</a></li>

</ul>

</div>

<h3>Quick search</h3>

</form>

Enter search terms or a module, class or function name.

</div>

</div>

<h1>api example code: two_scales.py<a class="headerlink" href="#api-example-code-two-scales-py" title="Permalink to this headline">¶</a></h1>

(<a class="reference external" href="../../mpl_examples/api/two_scales.py">Source code</a>, <a class="reference external" href="../../mpl_examples/api/two_scales.png">png</a>, <a class="reference external" href="../../mpl_examples/api/two_scales.hires.png">hires.png</a>, <a class="reference external" href="../../mpl_examples/api/two_scales.pdf">pdf</a>)

</div>

<div class="highlight-python"><div class="highlight"><pre>#!/usr/bin/env python

"""

Demonstrate how to do two plots on the same axes with different left

right scales.

The trick is to use *2 different axes*. Turn the axes rectangular

frame off on the 2nd axes to keep it from obscuring the first.

Manually set the tick locs and labels as desired. You can use

separate matplotlib.ticker formatters and locators as desired since

the two axes are independent.

This is achieved in the following example by calling the Axes.twinx()

method, which performs this work. See the source of twinx() in

axes.py for an example of how to do it for different x scales. (Hint:

use the xaxis instance and call tick_bottom and tick_top in place of

tick_left and tick_right.)

The twinx and twiny methods are also exposed as pyplot functions.

"""

import numpy as np

import matplotlib.pyplot as plt

fig, ax1 = plt.subplots()

t = np.arange(0.01, 10.0, 0.01)

s1 = np.exp(t)

ax1.plot(t, s1, 'b-')

ax1.set_xlabel('time (s)')

# Make the y-axis label and tick labels match the line color.

ax1.set_ylabel('exp', color='b')

for tl in ax1.get_yticklabels():

tl.set_color('b')

ax2 = ax1.twinx()

s2 = np.sin(2*np.pi*t)

ax2.plot(t, s2, 'r.')

ax2.set_ylabel('sin', color='r')

for tl in ax2.get_yticklabels():

tl.set_color('r')

plt.show()

</pre></div>

</div>

Keywords: python, matplotlib, pylab, example, codex (see <a class="reference internal" href="../../faq/howto_faq.html#how-to-search-examples">Search examples</a>)

</div>

</div>

Last updated on Oct 18, 2014.

Created using <a

href="http://sphinx-doc.org/">Sphinx</a> 1.3b2.

</div>

</body>

</html>

matplotlib.github.com/1.4.1/examples/api/two_scales.html at main · matplotlib/matplotlib.github.com · GitHub

Expand file tree

Breadcrumbs

two_scales.html

Latest commit

History

Breadcrumbs

two_scales.html

File metadata and controls