Accord.Tests.Statistics.Models.Markov.ForwardBackwardAlgorithmTest.BackwardTest2 C# (CSharp) Method

        public void BackwardTest2()
        {
            HiddenMarkovModel hmm = CreateModel3();

            //                     L  L  R  R
            int[] observations = { 0, 0, 1, 1 };

            double[,] actual = ForwardBackwardAlgorithm.Backward(hmm, observations);

            // Backward matrices from R's HMM package are
            // transposed in relation to the framework's:

            Assert.AreEqual(4, actual.GetLength(0));
            Assert.AreEqual(2, actual.GetLength(1));

            Assert.AreEqual(0.128982144, actual[0, 0], 1e-10);
            Assert.AreEqual(0.082407504, actual[0, 1], 1e-10);

            Assert.AreEqual(0.196816, actual[1, 0], 1e-10);
            Assert.AreEqual(0.453856, actual[1, 1], 1e-10);

            Assert.AreEqual(0.376, actual[2, 0], 1e-10);
            Assert.AreEqual(0.691, actual[2, 1], 1e-10);

            Assert.AreEqual(1, actual[3, 0]);
            Assert.AreEqual(1, actual[3, 1]);

            foreach (double p in actual)
                Assert.IsFalse(double.IsNaN(p));
        }