&nbsp;addObservations(double[][]&nbsp;x,
                   double[]&nbsp;y)
                     throws <a href="../../../../../../org/apache/commons/math3/stat/regression/ModelSpecificationException.html" title="class in org.apache.commons.math3.stat.regression">ModelSpecificationException</a></pre>
<div class="block">Adds a series of observations to the regression model. The lengths of
 x and y must be the same and x must be rectangular.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a hre