@Test
public void testAbs() {
double[] vals = {1, 2, 3, 4, 5, 6, 7, 8};
DoubleVector vec = new DenseDoubleVector(vals);
DoubleVector vec2 = vec.abs();
for (int i = 0; i < vals.length; ++i) {
assertEquals(Math.abs(vec.get(i)), vec2.get(i), 0.000001);
}
}
