Method diagMult

JSAT/src/jsat/linear/Matrix.java:1032–1038

Alters the matrix A so that it contains the result of A times a sparse matrix represented by only its diagonal values or A = A diag( b ) . This is equivalent to the code A = A#multiply(jsat.linear.Matrix) .multiply (#diag(jsat.linear.Vec) diag(b)) </co

(Matrix A, Vec b)

     * @param b the diagonal value vector 
     */
    public static void diagMult(Matrix A, Vec b)
    {
        if(A.cols() != b.length())
            throw new ArithmeticException("Could not multiply, matrix dimensions must agree");
        for(int i = 0; i < A.rows(); i++)
            RowColumnOps.multRow(A, i, b);
    }
    
    /**
     * Alters the matrix <i>A</i> so that it contains the result of