public void ConstructorTest()
{
#region doc_ctor
// Create a new Rademacher distribution
var dist = new RademacherDistribution();
double mean = dist.Mean; // 0
double median = dist.Median; // 0
double mode = dist.Mode; // NaN
double variance = dist.Variance; // 1
double lpdf = dist.LogProbabilityMassFunction(k: -1); // -0.69314718055994529
double cdf = dist.DistributionFunction(k: 1); // 1.0
double ccdf = dist.ComplementaryDistributionFunction(k: 1); // 0.0
int icdf1 = dist.InverseDistributionFunction(p: 0); // -1
int icdf3 = dist.InverseDistributionFunction(p: 1); // +1
double hf = dist.HazardFunction(x: 0); // 0.0
double chf = dist.CumulativeHazardFunction(x: 0); // 0.69314718055994529
string str = dist.ToString(CultureInfo.InvariantCulture); // Rademacher(x)
#endregion
Assert.AreEqual(0, mean);
Assert.AreEqual(1, variance);
Assert.AreEqual(0, median);
Assert.AreEqual(Double.NaN, mode);
Assert.AreEqual(0.69314718055994529, chf);
Assert.AreEqual(-0.69314718055994529, lpdf);
Assert.AreEqual(0, hf);
Assert.AreEqual(1, cdf);
Assert.AreEqual(0, ccdf);
Assert.AreEqual(-1, icdf1);
Assert.AreEqual(1, icdf3);
Assert.AreEqual("Rademacher(x)", str);
var range1 = dist.GetRange(0.95);
var range2 = dist.GetRange(0.99);
var range3 = dist.GetRange(0.01);
var range4 = dist.GetRange(1.0);
Assert.AreEqual(-1, range4.Min);
Assert.AreEqual(+1, range4.Max);
Assert.AreEqual(-1, range1.Min);
Assert.AreEqual(+1, range1.Max);
Assert.AreEqual(-1, range2.Min);
Assert.AreEqual(+1, range2.Max);
Assert.AreEqual(-1, range3.Min);
Assert.AreEqual(+1, range3.Max);
}
public void inverse_cdf()
{
var dist = new RademacherDistribution();
Assert.AreEqual(0, dist.ProbabilityMassFunction(-2));
Assert.AreEqual(0.5, dist.ProbabilityMassFunction(-1));
Assert.AreEqual(0, dist.ProbabilityMassFunction(0));
Assert.AreEqual(0.5, dist.ProbabilityMassFunction(+1));
Assert.AreEqual(0, dist.ProbabilityMassFunction(+2));
Assert.AreEqual(0, dist.DistributionFunction(-2));
Assert.AreEqual(0.5, dist.DistributionFunction(-1));
Assert.AreEqual(0.5, dist.DistributionFunction(0));
Assert.AreEqual(1.0, dist.DistributionFunction(+1));
Assert.AreEqual(1.0, dist.DistributionFunction(+2));
Assert.AreEqual(-1, dist.InverseDistributionFunction(0));
Assert.AreEqual(0, dist.InverseDistributionFunction(0.5));
Assert.AreEqual(+1, dist.InverseDistributionFunction(1));
}
