@Test
public void testTransform() {

    Matrix t = SymmetricFrequencyResponse.transform(100);
    assertTrue(t.get(99, 99) != 0);
    Matrix l = SymmetricFrequencyResponse.ltransform(53);
    Matrix d = SymmetricFrequencyResponse.dtransform(53);
    assertTrue(l.equals(d, 1e-18));
}