Accord.Tests.Statistics.IndependentTest.ProbabilityFunctionTest C# (CSharp) Method

        public void ProbabilityFunctionTest()
        {
            var p1 = new NormalDistribution(4.2, 1);
            var p2 = new NormalDistribution(7.0, 2);

            Independent<NormalDistribution> target = new Independent<NormalDistribution>(p1, p2);

            double[] x;
            double actual, expected;

            x = new double[] { 4.2, 7.0 };
            actual = target.ProbabilityDensityFunction(x);
            expected = p1.ProbabilityDensityFunction(x[0]) * p2.ProbabilityDensityFunction(x[1]);
            Assert.AreEqual(expected, actual, 1e-10);
            Assert.IsFalse(double.IsNaN(actual));

            x = new double[] { 0.0, 0.0 };
            actual = target.ProbabilityDensityFunction(x);
            expected = p1.ProbabilityDensityFunction(x[0]) * p2.ProbabilityDensityFunction(x[1]);
            Assert.AreEqual(expected, actual, 1e-10);
            Assert.IsFalse(double.IsNaN(actual));

            x = new double[] { 7.0, 4.2 };
            actual = target.ProbabilityDensityFunction(x);
            expected = p1.ProbabilityDensityFunction(x[0]) * p2.ProbabilityDensityFunction(x[1]);
            Assert.AreEqual(expected, actual, 1e-10);
            Assert.IsFalse(double.IsNaN(actual));
        }