Accord.Tests.Statistics.MultivariateLinearRegressionTest.RegressTest C# (CSharp) Method

        public void RegressTest()
        {
            double[][] X = 
            {
                new double[] {    4.47 },
                new double[] {  208.30 },
                new double[] { 3400.00 },
            };


            double[][] Y = 
            {
                new double[] {    0.51 },
                new double[] {  105.66 },
                new double[] { 1800.00 },
            };



            double eB = 0.5303528166;
            double eA = -3.290915095;

            var target = new MultivariateLinearRegression(1, 1, true);

            target.Regress(X, Y);

            Assert.AreEqual(target.Coefficients[0, 0], eB, 0.001);
            Assert.AreEqual(target.Intercepts[0], eA, 0.001);

            Assert.AreEqual(target.Inputs, 1);
            Assert.AreEqual(target.Outputs, 1);



            // Test manually including an constant term to generate an intercept
            double[][] X1 =
            {
                new double[] {    4.47, 1 },
                new double[] {  208.30, 1 },
                new double[] { 3400.00, 1 },
            };

            var target2 = new MultivariateLinearRegression(2, 1, false);

            target2.Regress(X1, Y);

            Assert.AreEqual(target2.Coefficients[0, 0], eB, 0.001);
            Assert.AreEqual(target2.Coefficients[1, 0], eA, 0.001);

            Assert.AreEqual(target2.Inputs, 2);
            Assert.AreEqual(target2.Outputs, 1);
        }