Accord.Tests.Statistics.TDistributionTest.DistributionFunctionTest C# (CSharp) Method

        public void DistributionFunctionTest()
        {
            TDistribution target = new TDistribution(1);
            double expected = 0.5;
            double actual = target.DistributionFunction(0);
            Assert.IsFalse(Double.IsNaN(actual));
            Assert.AreEqual(expected, actual, 1e-15);

            expected = 0.92559723470138278;
            actual = target.DistributionFunction(4.2);
            Assert.AreEqual(expected, actual);

            target = new TDistribution(2);
            expected = 0.5;
            actual = target.DistributionFunction(0);
            Assert.AreEqual(expected, actual);

            expected = 0.97385836652685043;
            actual = target.DistributionFunction(4.2);
            Assert.AreEqual(expected, actual);

            target = new TDistribution(3);
            expected = 0.5;
            actual = target.DistributionFunction(0);
            Assert.IsFalse(Double.IsNaN(actual));
            Assert.AreEqual(expected, actual, 1e-15);

            expected = 0.98768396091153043;
            actual = target.DistributionFunction(4.2);
            Assert.AreEqual(expected, actual);

            expected = 0.16324737815131229;
            actual = target.DistributionFunction(-1.17);
            Assert.AreEqual(expected, actual);
        }