v class="block">Create a Pascal distribution with the given number of successes and
 probability of success.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>r</code> - Number of successes.</dd><dd><code>p</code> - Probability of success.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></code> - if the