public static ILinkFunction Get(LinkFunctionType link) { ILinkFunction result = null; switch (link) { case LinkFunctionType.Absolute: result = new AbsoluteLinkFunction(); break; case LinkFunctionType.Cauchit: result = new CauchitLinkFunction(); break; case LinkFunctionType.Identity: result = new IdentityLinkFunction(); break; case LinkFunctionType.Inverse: result = new InverseLinkFunction(); break; case LinkFunctionType.InverseSquared: result = new InverseSquaredLinkFunction(); break; case LinkFunctionType.Logit: result = new LogitLinkFunction(); break; case LinkFunctionType.Log: result = new LogLinkFunction(); break; case LinkFunctionType.LogLog: result = new LogLogLinkFunction(); break; case LinkFunctionType.Probit: result = new ProbitLinkFunction(); break; case LinkFunctionType.Sin: result = new SinLinkFunction(); break; case LinkFunctionType.Threshold: result = new ThresholdLinkFunction(); break; } return(result); }
public void DerivativeTest() { double beta = 0.52; double constant = 2.42; double[] expected = { 5.84785, 6.15998, 6.48877, 6.83512, 7.19995, 7.58425, 7.98906, 8.41549, 8.86467, 9.33783, 9.83624 }; LogLinkFunction target = new LogLinkFunction(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-5); Assert.AreEqual(expected[i], d2, 1e-5); Assert.IsFalse(Double.IsNaN(d1)); Assert.IsFalse(Double.IsNaN(d2)); } }
public void TestException() { var fn = new LogLinkFunction(); double[] x = { 1, 2 }; fn.Evaluate(x); }
public void TestEvaluate() { var fn = new LogLinkFunction(); double[] x = { 2 }; double y = fn.Evaluate(x); Assert.AreEqual(0.6931471805599453, y, AIFH.DefaultPrecision); }
public void LogLinkFunctionConstructorTest2() { LogLinkFunction target = new LogLinkFunction(); Assert.AreEqual(1, target.B); Assert.AreEqual(0, target.A); for (int i = 0; i < 11; i++) { double x = i / 10.0; double y = Math.Log(x); Assert.AreEqual(y, target.Function(x), 1e-10); Assert.AreEqual(x, target.Inverse(y), 1e-10); } }
public void LogLinkFunctionConstructorTest() { double beta = 0.52; double constant = 2.42; LogLinkFunction target = new LogLinkFunction(beta, constant); Assert.AreEqual(beta, target.B); Assert.AreEqual(constant, target.A); for (int i = 0; i < 11; i++) { double x = i / 10.0; double y = (Math.Log(x) - constant) / beta; Assert.AreEqual(y, target.Function(x), 1e-10); Assert.AreEqual(x, target.Inverse(y), 1e-10); } }
public void TestBasic() { var reg = new MultipleLinearRegression(1); Assert.AreEqual(2, reg.LongTermMemory.Length); var lnk = new LogLinkFunction(); reg.LinkFunction = lnk; Assert.IsTrue(reg.LinkFunction == lnk); reg.LongTermMemory[0] = 1; reg.LongTermMemory[1] = 2; double[] input = { 1.0 }; double[] output = reg.ComputeRegression(input); Assert.AreEqual(1, output.Length); Assert.AreEqual(1.0986122886681098, output[0], AIFH.DefaultPrecision); }