Accord.Tests.Statistics.Models.Fields.IndependentMarkovFunctionTest.GradientTest3 C# (CSharp) 메소드

        public void GradientTest3()
        {
            double[][][] sequences2;
            int[] labels2;
            var hmm = CreateModel3(out sequences2, out labels2);
            var function = new MarkovMultivariateFunction(hmm);

            var model = new HiddenConditionalRandomField<double[]>(function);
            var target = new ForwardBackwardGradient<double[]>(model);
            target.Regularization = 2;

            var inputs = sequences2;
            var outputs = labels2;


            FiniteDifferences diff = new FiniteDifferences(function.Weights.Length);

            diff.Function = parameters => func(model, parameters, inputs, outputs, target.Regularization);

            double[] expected = diff.Compute(function.Weights);
            double[] actual = target.Gradient(function.Weights, inputs, outputs);


            for (int i = 0; i < actual.Length; i++)
            {
                double e = expected[i];
                double a = actual[i];
                Assert.AreEqual(e, a, 1e-3);

                Assert.IsFalse(double.IsNaN(actual[i]));
                Assert.IsFalse(double.IsNaN(expected[i]));
            }
        }