ble&nbsp;density(double&nbsp;x)</pre>
<div class="block">Returns the probability density function (PDF) of this distribution
 evaluated at the specified point <code>x</code>. In general, the PDF is
 the derivative of the <a href="../../../../../org/apache/commons/math3/distribution/RealDistribution.html#cumulativeProbability(double)"><code>CDF</code></a>.
 If the derivative does not exist at <code>x</code>, then an appropriate
 replacement should be returned, e.g. <code>Double.POSITIVE_INFINITY</code>,
 <co