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  <div class="section" id="examples">
<h1>Examples<a class="headerlink" href="#examples" title="Permalink to this headline"></a></h1>
<div class="section" id="introduction">
<h2>Introduction<a class="headerlink" href="#introduction" title="Permalink to this headline"></a></h2>
<p>A set of examples in neo/examples/ illustrates the use of neo classes.</p>
<div class="highlight-python"><div class="highlight"><pre><span class="c"># -*- coding: utf-8 -*-</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd">This is an example for reading files with neo.io</span>
<span class="sd">&quot;&quot;&quot;</span>

<span class="kn">import</span> <span class="nn">urllib</span>

<span class="kn">import</span> <span class="nn">neo</span>


<span class="c"># Plexon files</span>
<span class="n">distantfile</span> <span class="o">=</span> <span class="s">&#39;https://portal.g-node.org/neo/plexon/File_plexon_3.plx&#39;</span>
<span class="n">localfile</span> <span class="o">=</span> <span class="s">&#39;./File_plexon_3.plx&#39;</span>
<span class="n">urllib</span><span class="o">.</span><span class="n">urlretrieve</span><span class="p">(</span><span class="n">distantfile</span><span class="p">,</span> <span class="n">localfile</span><span class="p">)</span>

<span class="c">#create a reader</span>
<span class="n">reader</span> <span class="o">=</span> <span class="n">neo</span><span class="o">.</span><span class="n">io</span><span class="o">.</span><span class="n">PlexonIO</span><span class="p">(</span><span class="n">filename</span><span class="o">=</span><span class="s">&#39;File_plexon_3.plx&#39;</span><span class="p">)</span>
<span class="c"># read the blocks</span>
<span class="n">blks</span> <span class="o">=</span> <span class="n">reader</span><span class="o">.</span><span class="n">read</span><span class="p">(</span><span class="n">cascade</span><span class="o">=</span><span class="bp">True</span><span class="p">,</span> <span class="n">lazy</span><span class="o">=</span><span class="bp">False</span><span class="p">)</span>
<span class="k">print</span> <span class="n">blks</span>
<span class="c"># acces to segments</span>
<span class="k">for</span> <span class="n">blk</span> <span class="ow">in</span> <span class="n">blks</span><span class="p">:</span>
    <span class="k">for</span> <span class="n">seg</span> <span class="ow">in</span> <span class="n">blk</span><span class="o">.</span><span class="n">segments</span><span class="p">:</span>
        <span class="k">print</span> <span class="n">seg</span>
        <span class="k">for</span> <span class="n">asig</span> <span class="ow">in</span> <span class="n">seg</span><span class="o">.</span><span class="n">analogsignals</span><span class="p">:</span>
            <span class="k">print</span> <span class="n">asig</span>
        <span class="k">for</span> <span class="n">st</span> <span class="ow">in</span> <span class="n">seg</span><span class="o">.</span><span class="n">spiketrains</span><span class="p">:</span>
            <span class="k">print</span> <span class="n">st</span>


<span class="c"># CED Spike2 files</span>
<span class="n">distantfile</span> <span class="o">=</span> <span class="s">&#39;https://portal.g-node.org/neo/spike2/File_spike2_1.smr&#39;</span>
<span class="n">localfile</span> <span class="o">=</span> <span class="s">&#39;./File_spike2_1.smr&#39;</span>
<span class="n">urllib</span><span class="o">.</span><span class="n">urlretrieve</span><span class="p">(</span><span class="n">distantfile</span><span class="p">,</span> <span class="n">localfile</span><span class="p">)</span>

<span class="c">#create a reader</span>
<span class="n">reader</span> <span class="o">=</span> <span class="n">neo</span><span class="o">.</span><span class="n">io</span><span class="o">.</span><span class="n">Spike2IO</span><span class="p">(</span><span class="n">filename</span><span class="o">=</span><span class="s">&#39;File_spike2_1.smr&#39;</span><span class="p">)</span>
<span class="c"># read the block</span>
<span class="n">bl</span> <span class="o">=</span> <span class="n">reader</span><span class="o">.</span><span class="n">read</span><span class="p">(</span><span class="n">cascade</span><span class="o">=</span><span class="bp">True</span><span class="p">,</span> <span class="n">lazy</span><span class="o">=</span><span class="bp">False</span><span class="p">)[</span><span class="mi">0</span><span class="p">]</span>
<span class="k">print</span> <span class="n">bl</span>
<span class="c"># acces to segments</span>
<span class="k">for</span> <span class="n">seg</span> <span class="ow">in</span> <span class="n">bl</span><span class="o">.</span><span class="n">segments</span><span class="p">:</span>
    <span class="k">print</span> <span class="n">seg</span>
    <span class="k">for</span> <span class="n">asig</span> <span class="ow">in</span> <span class="n">seg</span><span class="o">.</span><span class="n">analogsignals</span><span class="p">:</span>
        <span class="k">print</span> <span class="n">asig</span>
    <span class="k">for</span> <span class="n">st</span> <span class="ow">in</span> <span class="n">seg</span><span class="o">.</span><span class="n">spiketrains</span><span class="p">:</span>
        <span class="k">print</span> <span class="n">st</span>
</pre></div>
</div>
<div class="highlight-python"><div class="highlight"><pre><span class="c"># -*- coding: utf-8 -*-</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd">This is an example for plotting neo object with maplotlib.</span>
<span class="sd">&quot;&quot;&quot;</span>

<span class="kn">import</span> <span class="nn">urllib</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">quantities</span> <span class="kn">as</span> <span class="nn">pq</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">neo</span>

<span class="n">url</span> <span class="o">=</span> <span class="s">&#39;https://portal.g-node.org/neo/&#39;</span>
<span class="n">distantfile</span> <span class="o">=</span> <span class="n">url</span> <span class="o">+</span> <span class="s">&#39;neuroexplorer/File_neuroexplorer_2.nex&#39;</span>
<span class="n">localfile</span> <span class="o">=</span> <span class="s">&#39;File_neuroexplorer_2.nex&#39;</span>
<span class="n">urllib</span><span class="o">.</span><span class="n">urlretrieve</span><span class="p">(</span><span class="n">distantfile</span><span class="p">,</span> <span class="n">localfile</span><span class="p">)</span>


<span class="n">reader</span> <span class="o">=</span> <span class="n">neo</span><span class="o">.</span><span class="n">io</span><span class="o">.</span><span class="n">NeuroExplorerIO</span><span class="p">(</span><span class="n">filename</span><span class="o">=</span><span class="s">&#39;File_neuroexplorer_2.nex&#39;</span><span class="p">)</span>
<span class="n">bl</span> <span class="o">=</span> <span class="n">reader</span><span class="o">.</span><span class="n">read</span><span class="p">(</span><span class="n">cascade</span><span class="o">=</span><span class="bp">True</span><span class="p">,</span> <span class="n">lazy</span><span class="o">=</span><span class="bp">False</span><span class="p">)[</span><span class="mi">0</span><span class="p">]</span>
<span class="k">for</span> <span class="n">seg</span> <span class="ow">in</span> <span class="n">bl</span><span class="o">.</span><span class="n">segments</span><span class="p">:</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">ax1</span> <span class="o">=</span> <span class="n">fig</span><span class="o">.</span><span class="n">add_subplot</span><span class="p">(</span><span class="mi">2</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">1</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_subplot</span><span class="p">(</span><span class="mi">2</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="n">ax1</span><span class="o">.</span><span class="n">set_title</span><span class="p">(</span><span class="n">seg</span><span class="o">.</span><span class="n">file_origin</span><span class="p">)</span>
    <span class="n">mint</span> <span class="o">=</span> <span class="mi">0</span> <span class="o">*</span> <span class="n">pq</span><span class="o">.</span><span class="n">s</span>
    <span class="n">maxt</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">inf</span> <span class="o">*</span> <span class="n">pq</span><span class="o">.</span><span class="n">s</span>
    <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">asig</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">seg</span><span class="o">.</span><span class="n">analogsignals</span><span class="p">):</span>
        <span class="n">times</span> <span class="o">=</span> <span class="n">asig</span><span class="o">.</span><span class="n">times</span><span class="o">.</span><span class="n">rescale</span><span class="p">(</span><span class="s">&#39;s&#39;</span><span class="p">)</span><span class="o">.</span><span class="n">magnitude</span>
        <span class="n">asig</span> <span class="o">=</span> <span class="n">asig</span><span class="o">.</span><span class="n">rescale</span><span class="p">(</span><span class="s">&#39;mV&#39;</span><span class="p">)</span><span class="o">.</span><span class="n">magnitude</span>
        <span class="n">ax1</span><span class="o">.</span><span class="n">plot</span><span class="p">(</span><span class="n">times</span><span class="p">,</span> <span class="n">asig</span><span class="p">)</span>

    <span class="n">trains</span> <span class="o">=</span> <span class="p">[</span><span class="n">st</span><span class="o">.</span><span class="n">rescale</span><span class="p">(</span><span class="s">&#39;s&#39;</span><span class="p">)</span><span class="o">.</span><span class="n">magnitude</span> <span class="k">for</span> <span class="n">st</span> <span class="ow">in</span> <span class="n">seg</span><span class="o">.</span><span class="n">spiketrains</span><span class="p">]</span>
    <span class="n">colors</span> <span class="o">=</span> <span class="n">pyplot</span><span class="o">.</span><span class="n">cm</span><span class="o">.</span><span class="n">jet</span><span class="p">(</span><span class="n">np</span><span class="o">.</span><span class="n">linspace</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="nb">len</span><span class="p">(</span><span class="n">seg</span><span class="o">.</span><span class="n">spiketrains</span><span class="p">)))</span>
    <span class="n">ax2</span><span class="o">.</span><span class="n">eventplot</span><span class="p">(</span><span class="n">trains</span><span class="p">,</span> <span class="n">colors</span><span class="o">=</span><span class="n">colors</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>
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