public void IncorrectBinCount()
{
Assert.That(() =>
{
var sgt = new SimpleGoodTuringProbabilityDistribution <string>(_fd, _fd.ObservedSamples.Count);
}, Throws.TypeOf <ArgumentOutOfRangeException>());
}
public void NoSamples()
{
var sgt = new SimpleGoodTuringProbabilityDistribution <string>(new FrequencyDistribution <string>(), 1);
Assert.That(sgt["a"], Is.EqualTo(0));
Assert.That(sgt["b"], Is.EqualTo(0));
Assert.That(sgt["c"], Is.EqualTo(0));
Assert.That(sgt.Discount, Is.EqualTo(0));
}
public void ProbabilityTwoUnseen()
{
var sgt = new SimpleGoodTuringProbabilityDistribution <string>(_fd, _fd.ObservedSamples.Count + 2);
Assert.That(sgt["a"], Is.EqualTo(0.01765).Within(0.00001));
Assert.That(sgt["c"], Is.EqualTo(0.02728).Within(0.00001));
Assert.That(sgt["d"], Is.EqualTo(0.03682).Within(0.00001));
Assert.That(sgt["o"], Is.EqualTo(0.08433).Within(0.00001));
Assert.That(sgt["q"], Is.EqualTo(0.1033).Within(0.0001));
Assert.That(sgt["t"], Is.EqualTo(0.01136).Within(0.00001));
Assert.That(sgt["z"], Is.EqualTo(0.01136).Within(0.00001));
}
