different observations. The number of rows of the independent variable matrix <code>x</code> needs to match the size of the dependent variable vector <code>y</code> and <code>alpha</code> and the number of columns of <code>x</code> needs to match the size of the coefficient vector <code>beta</code>. If <code>x</code> and <code>y</code> are data (not parameters) this function can be executed on a GPU.</p>

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