public void DerivativeTest() { double beta = 3.14; double constant = 2.91; double[] expected = { -0.316272, -0.271211, -0.235919, -0.207668, -0.184638, -0.16557, -0.149573, -0.135995, -0.124354, -0.114284, -0.105503 }; InverseSquaredLinkFunction target = new InverseSquaredLinkFunction(beta, constant); 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)); } }
public void InverseSquaredLinkFunctionConstructorTest() { InverseSquaredLinkFunction target = new InverseSquaredLinkFunction(); Assert.AreEqual(0, target.A); Assert.AreEqual(1, target.B); for (int i = 0; i < 11; i++) { double x = i / 10.0; double y = 1 / (x * x); Assert.AreEqual(y, target.Function(x), 1e-10); Assert.AreEqual(x, target.Inverse(y), 1e-10); } }
public void InverseSquaredLinkFunctionConstructorTest1() { double beta = 3.14; double constant = 2.91; InverseSquaredLinkFunction target = new InverseSquaredLinkFunction(beta, constant); Assert.AreEqual(constant, target.A); Assert.AreEqual(beta, target.B); for (int i = 0; i < 11; i++) { double x = i / 10.0; double y = (1 / (x * x) - constant) / beta; Assert.AreEqual(y, target.Function(x), 1e-10); Assert.AreEqual(x, target.Inverse(y), 1e-10); } }