public Derivative2 ( double y ) : double | ||
y | double | The reverse transformed value. |
return | double |
public void DerivativeTest() { double[] expected = { 0.5, 0.497502, 0.490033, 0.477668, 0.46053, 0.438791, 0.412668, 0.382421, 0.348353, 0.310805, 0.270151 }; SinLinkFunction target = new SinLinkFunction(); for (int i = 0; i < 11; i++) { double x = i / 10.0; double y = target.Inverse(x); double d1 = target.Derivative(x); double d2 = target.Derivative2(y); Assert.AreEqual(expected[i], d1, 1e-6); Assert.AreEqual(expected[i], d2, 1e-6); Assert.IsFalse(Double.IsNaN(d1)); Assert.IsFalse(Double.IsNaN(d2)); } }