public void TestException()
{
var fn = new IdentityLinkFunction();
double[] x = { 1, 2 };
fn.Evaluate(x);
}
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 TestEvaluate()
{
var fn = new IdentityLinkFunction();
double[] x = { 2 };
double y = fn.Evaluate(x);
Assert.AreEqual(2, y, AIFH.DefaultPrecision);
}
public void IdentityLinkFunctionConstructorTest()
{
IdentityLinkFunction target = new IdentityLinkFunction();
Assert.AreEqual(0, target.A);
Assert.AreEqual(1, target.B);
for (int i = 0; i < 10; i++)
{
Assert.AreEqual(i, target.Function(i));
Assert.AreEqual(i, target.Inverse(i));
Assert.AreEqual(1, target.Derivative(i));
Assert.AreEqual(1, target.Derivative(i));
}
}
public void IdentityLinkFunctionConstructorTest1()
{
double mean = 3.14;
double variance = 2.91;
IdentityLinkFunction target = new IdentityLinkFunction(variance, mean);
Assert.AreEqual(mean, target.A);
Assert.AreEqual(variance, target.B);
for (int i = 0; i < 10; i++)
{
Assert.AreEqual((i - mean) / variance, target.Function(i), 1e-10);
Assert.AreEqual(i, target.Inverse((i - mean) / variance), 1e-10);
Assert.AreEqual(variance, target.Derivative(i));
Assert.AreEqual(variance, target.Derivative(i));
}
}
