public ProbabilityDensityFunction ( double x ) : double | ||
x | double | A single point in the distribution range. |
Результат | double |
public void ConstructorTest() { #region doc_example1 // Create a new Generalized Pareto Distribution with mu = 0, sigma = 0.42, xi = 3 var pareto = new GeneralizedParetoDistribution(location: 0, scale: 0.42, shape: 3); // Common measures double mean = pareto.Mean; // -0.21 double median = pareto.Median; // 0.98 double var = pareto.Variance; // -0.00882 double mode = pareto.Mode; // 0.19185185523755152 // Cumulative distribution functions double cdf = pareto.DistributionFunction(x: 1.4); // 0.55035568697739079 double ccdf = pareto.ComplementaryDistributionFunction(x: 1.4); // 0.44964431302260921 double icdf = pareto.InverseDistributionFunction(p: cdf); // 1.3999999035548829 // Probability density functions double pdf = pareto.ProbabilityDensityFunction(x: 1.4); // 0.097325608879352654 double lpdf = pareto.LogProbabilityDensityFunction(x: 1.4); // -2.3296931293597707 // Hazard (failure rate) functions double hf = pareto.HazardFunction(x: 1.4); // 0.21645021645021648 double chf = pareto.CumulativeHazardFunction(x: 1.4); // 0.79929842426612341 // String representation string str = pareto.ToString(CultureInfo.InvariantCulture); // Pareto(x; μ = 0, σ = 0.42, ξ = 3) #endregion Assert.AreEqual(-0.21, mean); Assert.AreEqual(0.98, median); Assert.AreEqual(-0.008819999999999998, var); Assert.AreEqual(0.19185185523755152, mode, 1e-10); Assert.AreEqual(0.79929842426612341, chf); Assert.AreEqual(0.55035568697739079, cdf); Assert.AreEqual(0.097325608879352654, pdf); Assert.AreEqual(-2.3296931293597707, lpdf); Assert.AreEqual(0.21645021645021648, hf); Assert.AreEqual(0.44964431302260921, ccdf); Assert.AreEqual(1.40, icdf, 1e-5); Assert.AreEqual("Pareto(x; μ = 0, σ = 0.42, ξ = 3)", str); var range1 = pareto.GetRange(0.95); var range2 = pareto.GetRange(0.99); var range3 = pareto.GetRange(0.01); Assert.AreEqual(0.023289267355975959, range1.Min, 1e-8); Assert.AreEqual(1119.8599999998519, range1.Max, 1e-8); Assert.AreEqual(0.0042854196206619614, range2.Min, 1e-8); Assert.AreEqual(139999.86000000086, range2.Max, 1e-8); Assert.AreEqual(0.0042854196206619493, range3.Min, 1e-8); Assert.AreEqual(139999.86000000086, range3.Max, 1e-8); }
public void ParetoDistributionConstructorTest() { double expected, actual; { var target = new GeneralizedParetoDistribution(0, 3.1, 4.42); actual = target.ProbabilityDensityFunction(-1); expected = 0.0; Assert.AreEqual(expected, actual, 1e-7); Assert.IsFalse(Double.IsNaN(actual)); actual = target.ProbabilityDensityFunction(0); expected = 0.32258064516129031; Assert.AreEqual(expected, actual, 1e-7); Assert.IsFalse(Double.IsNaN(actual)); actual = target.ProbabilityDensityFunction(3.09); expected = 0.040736023124121959; Assert.AreEqual(expected, actual, 1e-7); Assert.IsFalse(Double.IsNaN(actual)); actual = target.ProbabilityDensityFunction(3.1); expected = 0.040604655728907986; Assert.AreEqual(expected, actual, 1e-7); actual = target.ProbabilityDensityFunction(3.2); expected = 0.039332127082599325; Assert.AreEqual(expected, actual, 1e-7); actual = target.ProbabilityDensityFunction(5.8); expected = 0.021027167986227731; Assert.AreEqual(expected, actual, 1e-7); actual = target.ProbabilityDensityFunction(10); expected = 0.011412447781534748; Assert.AreEqual(expected, actual, 1e-7); } }