public async Task TestInverseGammaDistribution01()
{
using var rng = new MultiThreadedRng();
var dist = new FastRng.Double.Distributions.InverseGammaA3B05(rng);
var fra = new FrequencyAnalysis();
for (var n = 0; n < 100_000; n++)
{
fra.CountThis(await dist.NextNumber());
}
var result = fra.NormalizeAndPlotEvents(TestContext.WriteLine);
Assert.That(result[0], Is.EqualTo(0.0000000000000003).Within(0.0000001));
Assert.That(result[1], Is.EqualTo(0.0000011605257228).Within(0.00001));
Assert.That(result[2], Is.EqualTo(0.0009536970016103).Within(0.0015));
Assert.That(result[21], Is.EqualTo(0.5880485243048120).Within(0.05));
Assert.That(result[22], Is.EqualTo(0.5433842148912880).Within(0.05));
Assert.That(result[23], Is.EqualTo(0.5017780549216030).Within(0.05));
Assert.That(result[50], Is.EqualTo(0.0741442015957425).Within(0.009));
Assert.That(result[75], Is.EqualTo(0.0207568945092484).Within(0.006));
Assert.That(result[85], Is.EqualTo(0.0136661506653688).Within(0.006));
Assert.That(result[90], Is.EqualTo(0.0112550619601327).Within(0.006));
Assert.That(result[97], Is.EqualTo(0.0087026933539773).Within(0.005));
Assert.That(result[98], Is.EqualTo(0.0083995375385004).Within(0.005));
Assert.That(result[99], Is.EqualTo(0.0081094156379928).Within(0.005));
}
public async Task TestInverseGammaGeneratorWithRange01()
{
using var rng = new MultiThreadedRng();
var dist = new FastRng.Double.Distributions.InverseGammaA3B05(rng);
var samples = new double[1_000];
