.</dd>
<dt><span class="strong">Returns:</span></dt><dd>The output value, or NaN, if the value has not been calculated.</dd></dl>
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<h4>errorValue</h4>
<pre>public&nbsp;double&nbsp;errorValue(boolean&nbsp;calculate)</pre>
<div class="block">Call this to get the error value of this unit.</div>
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<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../weka/classifiers/functions/neural/Neura