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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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<title>Textbox — Matplotlib 2.1.0 documentation</title>
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<div id="unreleased-message"> You are reading an old version of the documentation (v2.1.0). For the latest version see <a href="https://matplotlib.org/stable/gallery/widgets/textbox.html">https://matplotlib.org/stable/gallery/widgets/textbox.html</a></div>
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<span id="sphx-glr-gallery-widgets-textbox-py"></span><h1>Textbox<a class="headerlink" href="#textbox" title="Permalink to this headline">¶</a></h1>
<img alt="../../_images/sphx_glr_textbox_001.png" class="align-center" src="../../_images/sphx_glr_textbox_001.png" />
<div class="highlight-python"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">numpy</span> <span class="kn">as</span> <span class="nn">np</span>
<span class="kn">import</span> <span class="nn">matplotlib.pyplot</span> <span class="kn">as</span> <span class="nn">plt</span>
<span class="kn">from</span> <span class="nn">matplotlib.widgets</span> <span class="kn">import</span> <a href="../../api/widgets_api.html#matplotlib.widgets.TextBox" title="View documentation for matplotlib.widgets.TextBox"><span class="n">TextBox</span></a>
<span class="n">fig</span><span class="p">,</span> <span class="n">ax</span> <span class="o">=</span> <a href="../../api/_as_gen/matplotlib.pyplot.subplots.html#matplotlib.pyplot.subplots" title="View documentation for matplotlib.pyplot.subplots"><span class="n">plt</span><span class="o">.</span><span class="n">subplots</span></a><span class="p">()</span>
<a href="../../api/_as_gen/matplotlib.pyplot.subplots_adjust.html#matplotlib.pyplot.subplots_adjust" title="View documentation for matplotlib.pyplot.subplots_adjust"><span class="n">plt</span><span class="o">.</span><span class="n">subplots_adjust</span></a><span class="p">(</span><span class="n">bottom</span><span class="o">=</span><span class="mf">0.2</span><span class="p">)</span>
<span class="n">t</span> <span class="o">=</span> <a href="https://docs.scipy.org/doc/numpy/reference/generated/numpy.arange.html#numpy.arange" title="View documentation for numpy.arange"><span class="n">np</span><span class="o">.</span><span class="n">arange</span></a><span class="p">(</span><span class="o">-</span><span class="mf">2.0</span><span class="p">,</span> <span class="mf">2.0</span><span class="p">,</span> <span class="mf">0.001</span><span class="p">)</span>
<span class="n">s</span> <span class="o">=</span> <span class="n">t</span> <span class="o">**</span> <span class="mi">2</span>
<span class="n">initial_text</span> <span class="o">=</span> <span class="s2">"t ** 2"</span>
<span class="n">l</span><span class="p">,</span> <span class="o">=</span> <a href="../../api/_as_gen/matplotlib.pyplot.plot.html#matplotlib.pyplot.plot" title="View documentation for matplotlib.pyplot.plot"><span class="n">plt</span><span class="o">.</span><span class="n">plot</span></a><span class="p">(</span><span class="n">t</span><span class="p">,</span> <span class="n">s</span><span class="p">,</span> <span class="n">lw</span><span class="o">=</span><span class="mi">2</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">submit</span><span class="p">(</span><span class="n">text</span><span class="p">):</span>
<span class="n">ydata</span> <span class="o">=</span> <span class="nb">eval</span><span class="p">(</span><span class="n">text</span><span class="p">)</span>
<span class="n">l</span><span class="o">.</span><span class="n">set_ydata</span><span class="p">(</span><span class="n">ydata</span><span class="p">)</span>
<span class="n">ax</span><span class="o">.</span><span class="n">set_ylim</span><span class="p">(</span><span class="n">np</span><span class="o">.</span><span class="n">min</span><span class="p">(</span><span class="n">ydata</span><span class="p">),</span> <span class="n">np</span><span class="o">.</span><span class="n">max</span><span class="p">(</span><span class="n">ydata</span><span class="p">))</span>
<a href="../../api/_as_gen/matplotlib.pyplot.draw.html#matplotlib.pyplot.draw" title="View documentation for matplotlib.pyplot.draw"><span class="n">plt</span><span class="o">.</span><span class="n">draw</span></a><span class="p">()</span>
<span class="n">axbox</span> <span class="o">=</span> <a href="../../api/_as_gen/matplotlib.pyplot.axes.html#matplotlib.pyplot.axes" title="View documentation for matplotlib.pyplot.axes"><span class="n">plt</span><span class="o">.</span><span class="n">axes</span></a><span class="p">([</span><span class="mf">0.1</span><span class="p">,</span> <span class="mf">0.05</span><span class="p">,</span> <span class="mf">0.8</span><span class="p">,</span> <span class="mf">0.075</span><span class="p">])</span>
<span class="n">text_box</span> <span class="o">=</span> <a href="../../api/widgets_api.html#matplotlib.widgets.TextBox" title="View documentation for matplotlib.widgets.TextBox"><span class="n">TextBox</span></a><span class="p">(</span><span class="n">axbox</span><span class="p">,</span> <span class="s1">'Evaluate'</span><span class="p">,</span> <span class="n">initial</span><span class="o">=</span><span class="n">initial_text</span><span class="p">)</span>
<span class="n">text_box</span><span class="o">.</span><span class="n">on_submit</span><span class="p">(</span><span class="n">submit</span><span class="p">)</span>
<a href="../../api/_as_gen/matplotlib.pyplot.show.html#matplotlib.pyplot.show" title="View documentation for matplotlib.pyplot.show"><span class="n">plt</span><span class="o">.</span><span class="n">show</span></a><span class="p">()</span>
</pre></div>
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<p><strong>Total running time of the script:</strong> ( 0 minutes 0.036 seconds)</p>
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