@Test
public void testAssignColumn() {

  double[] data = {2.1, 3.2, 4.3};
  test.assignColumn(1, new DenseVector(data));
  assertEquals("test[0][1]", 2.1, test.getQuick(0, 1), EPSILON);
  assertEquals("test[1][1]", 3.2, test.getQuick(1, 1), EPSILON);
  assertEquals("test[2][1]", 4.3, test.getQuick(2, 1), EPSILON);
}