gressors to include</dd>
<dt><span class="strong">Returns:</span></dt><dd>RegressionResults acts as a container of regression output</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="../../../../../../org/apache/commons/math3/exception/MathIllegalArgumentException.html" title="class in org.apache.commons.math3.exception">MathIllegalArgumentException</a></code> - if the variablesToInclude array is null or zero length</dd>
<dd><code><a href="../../../../../../org/apache/commons/math3/except