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<section id="module-wonambi.trans.peaks">
<span id="wonambi-trans-peaks-module"></span><h1>wonambi.trans.peaks module<a class="headerlink" href="#module-wonambi.trans.peaks" title="Permalink to this heading"></a></h1>
<dl class="py function">
<dt class="sig sig-object py" id="wonambi.trans.peaks.get_slopes">
<span class="sig-prename descclassname"><span class="pre">wonambi.trans.peaks.</span></span><span class="sig-name descname"><span class="pre">get_slopes</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">data</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">s_freq</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">level</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">'all'</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">smooth</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">0.05</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/wonambi/trans/peaks.html#get_slopes"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#wonambi.trans.peaks.get_slopes" title="Permalink to this definition"></a></dt>
<dd><p>Get the slopes (average and/or maximum) for each quadrant of a slow
wave, as well as the combination of quadrants 2 and 3.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>data</strong> (<em>ndarray</em>) – raw data as vector</p></li>
<li><p><strong>s_freq</strong> (<em>int</em>) – sampling frequency</p></li>
<li><p><strong>level</strong> (<em>str</em>) – if ‘average’, returns average slopes (uV / s). if ‘maximum’, returns
the maximum of the slope derivative (uV / s**2). if ‘all’, returns all.</p></li>
<li><p><strong>smooth</strong> (<em>float</em><em> or </em><em>None</em>) – if not None, signal will be smoothed by moving average, with a window
of this duration</p></li>
</ul>
</dd>
<dt class="field-even">Returns<span class="colon">:</span></dt>
<dd class="field-even"><p><em>tuple of ndarray</em> – each array is len 5, with q1, q2, q3, q4 and q23. First array is
average slopes and second is maximum slopes.</p>
</dd>
</dl>
<p class="rubric">Notes</p>
<p>This function is made to take automatically detected start and end
times AS WELL AS manually delimited ones. In the latter case, the first
and last zero has to be detected within this function.</p>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="wonambi.trans.peaks.peaks">
<span class="sig-prename descclassname"><span class="pre">wonambi.trans.peaks.</span></span><span class="sig-name descname"><span class="pre">peaks</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">data</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">method</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">'max'</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">axis</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">'time'</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">limits</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/wonambi/trans/peaks.html#peaks"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#wonambi.trans.peaks.peaks" title="Permalink to this definition"></a></dt>
<dd><p>Return the values of an index where the data is at max or min</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>method</strong> (<em>str</em><em>, </em><em>optional</em>) – ‘max’ or ‘min’</p></li>
<li><p><strong>axis</strong> (<em>str</em><em>, </em><em>optional</em>) – the axis where you want to detect the peaks</p></li>
<li><p><strong>limits</strong> (<em>tuple</em><em> of </em><em>two values</em><em>, </em><em>optional</em>) – the lowest and highest limits where to search for the peaks</p></li>
<li><p><strong>data</strong> (<em>instance</em><em> of </em><a class="reference internal" href="wonambi.datatype.html#wonambi.datatype.Data" title="wonambi.datatype.Data"><em>Data</em></a>) – one of the datatypes</p></li>
</ul>
</dd>
<dt class="field-even">Returns<span class="colon">:</span></dt>
<dd class="field-even"><p><em>instance of Data</em> – with one dimension less that the input data. The actual values in
the data can be not-numberic, for example, if you look for the
max value across electrodes</p>
</dd>
</dl>
<p class="rubric">Notes</p>
<p>This function is useful when you want to find the frequency value at which
the power is the largest, or to find the time point at which the signal is
largest, or the channel at which the activity is largest.</p>
</dd></dl>
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