Accord.Tests.Statistics.MixtureDistributionTest.ProbabilityDensityFunction C# (CSharp) Method

        public void ProbabilityDensityFunction()
        {
            NormalDistribution[] components = new NormalDistribution[2];
            components[0] = new NormalDistribution(2, 1);
            components[1] = new NormalDistribution(5, 1);

            double[] coefficients = { 0.4, 0.5 };

            var mixture = new Mixture<NormalDistribution>(coefficients, components);

            double expected = 0.4 * components[0].ProbabilityDensityFunction(0.42) +
                              0.5 * components[1].ProbabilityDensityFunction(0.42);

            double actual = mixture.ProbabilityDensityFunction(0.42);

            Assert.AreEqual(expected, actual);
        }