Method testDiagMult_Vec_Matrix

JSAT/test/jsat/linear/MatrixTest.java:194–221

Test of diagMult method, of class Matrix.

()

     * Test of diagMult method, of class Matrix.
     */
    @Test
    public void testDiagMult_Vec_Matrix()
    {
        //TODO add diagonal test case
        System.out.println("diagMult");
        Matrix A = new DenseMatrix(new double[][]
        {
            { 0,    8,    7,    5,    5},
            { 6,   10,    4,    8,    4},
            {10,    7,    5,    8,    6},
            { 5,    2,    2,    5,    5},
            { 6,    7,   10,    5,    8},
        });
        
        Vec b = new DenseVector(new double[]{4, -3, 3, -4, 2});
        
        double[][] expected = new double[][]
        {
            {  0,   32,   28,   20,   20},
            {-18,  -30,  -12,  -24,  -12},
            { 30,   21,   15,   24,   18},
            {-20,   -8,   -8,  -20,  -20},
            { 12,   14,   20,   10,   16},
        };
        
        Matrix.diagMult(b, A);
        assertEquals(new DenseMatrix(expected), A);
    }

    /**
     * Test of isSymmetric method, of class Matrix.