@Test
void testRowWiseAddition2() {

  double[] a = {3, 4, 5};
  double[] b = {3, 4, 5};
  double[] c = {3, 4, 5};
  Table t =
      Table.create(
          "test",
          DoubleColumn.create("a", a),
          DoubleColumn.create("b", b),
          DoubleColumn.create("c", c));
  DoubleColumn n = sum(t.doubleColumn("a"), t.doubleColumn("b"), t.doubleColumn("c"));
  assertEquals(9, n.get(0), 0);
  assertEquals(12, n.get(1), 0);
  assertEquals(15, n.get(2), 0);
}