ata(double, double)">addData</a></strong>(double&nbsp;x,
       double&nbsp;y)</code>
<div class="block">Adds the observation (x,y) to the regression data set.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/stat/regression/SimpleRegression.html#addObservation(double[], double)">addObservation</a></strong>(double[]&nbsp;x,
              double&nbsp;y)</code>
<div class="block">Adds one o