Accord.Tests.Statistics.GammaDistributionTest.CumulativeFunctionTest C# (CSharp) Method

        public void CumulativeFunctionTest()
        {
            double shape = 0.4;
            double scale = 4.2;

            double[] cdf = 
            {
                0, 0.251017, 0.328997, 0.38435, 0.428371, 0.465289,
                0.497226, 0.525426, 0.55069, 0.573571, 0.594469
            };

            GammaDistribution target = new GammaDistribution(scale, shape);

            for (int i = 0; i < 11; i++)
            {
                double x = i / 10.0;
                double actual = target.DistributionFunction(x);
                double expected = cdf[i];

                Assert.AreEqual(expected, actual, 1e-5);
                Assert.IsFalse(double.IsNaN(actual));
            }
        }