Accord.Tests.Math.GammaTest.GammaUpperRTest C# (CSharp) Method

        public void GammaUpperRTest()
        {
            // Example values from
            // http://opensource.zyba.com/code/maths/special/gamma/gamma_upper_reg.php

            double expected, actual;

            actual = Gamma.UpperIncomplete(0.000000, 2);
            expected = 1.000000;
            Assert.AreEqual(expected, actual);
            Assert.IsFalse(double.IsNaN(actual));

            actual = Gamma.UpperIncomplete(0.250000, 2);
            expected = 0.017286;
            Assert.AreEqual(expected, actual, 1e-6);
            Assert.IsFalse(double.IsNaN(actual));

            actual = Gamma.UpperIncomplete(0.500000, 2);
            expected = 0.045500;
            Assert.AreEqual(expected, actual, 1e-6);
            Assert.IsFalse(double.IsNaN(actual));

            actual = Gamma.UpperIncomplete(0.750000, 2);
            expected = 0.085056;
            Assert.AreEqual(expected, actual, 1e-6);
            Assert.IsFalse(double.IsNaN(actual));

            actual = Gamma.UpperIncomplete(1.000000, 2);
            expected = 0.135335;
            Assert.AreEqual(expected, actual, 1e-6);
            Assert.IsFalse(double.IsNaN(actual));

            actual = Gamma.UpperIncomplete(1.250000, 2);
            expected = 0.194847;
            Assert.AreEqual(expected, actual, 1e-6);
            Assert.IsFalse(double.IsNaN(actual));

            actual = Gamma.UpperIncomplete(1.500000, 2);
            expected = 0.261464;
            Assert.AreEqual(expected, actual, 1e-6);
            Assert.IsFalse(double.IsNaN(actual));

            actual = Gamma.UpperIncomplete(1.750000, 2);
            expected = 0.332706;
            Assert.AreEqual(expected, actual, 1e-6);
            Assert.IsFalse(double.IsNaN(actual));

            actual = Gamma.UpperIncomplete(2.000000, 2);
            expected = 0.406006;
            Assert.AreEqual(expected, actual, 1e-6);
            Assert.IsFalse(double.IsNaN(actual));

            actual = Gamma.UpperIncomplete(2.250000, 2);
            expected = 0.478944;
            Assert.AreEqual(expected, actual, 1e-6);
            Assert.IsFalse(double.IsNaN(actual));

            actual = Gamma.UpperIncomplete(2.500000, 2);
            expected = 0.549416;
            Assert.AreEqual(expected, actual, 1e-6);
            Assert.IsFalse(double.IsNaN(actual));

            actual = Gamma.UpperIncomplete(2.750000, 2);
            expected = 0.615734;
            Assert.AreEqual(expected, actual, 1e-6);
            Assert.IsFalse(double.IsNaN(actual));
        }