Accord.Tests.Statistics.WilcoxonDistributionTest.ProbabilityTest C# (CSharp) Method

        public void ProbabilityTest()
        {
            // Example from https://onlinecourses.science.psu.edu/stat414/node/319

            double[] ranks = { 1, 2, 3 };

            WilcoxonDistribution target = new WilcoxonDistribution(ranks);

            double[] expected = { 1 / 8.0, 1 / 8.0, 1 / 8.0, 2 / 8.0, 1 / 8.0, 1 / 8.0, 1 / 8.0 };

            for (int i = 0; i < expected.Length; i++)
            {
                // P(W=i)
                double actual = target.ProbabilityDensityFunction(i);
                Assert.AreEqual(expected[i], actual);
            }
        }