Accord.Tests.Statistics.MultipleLinearRegressionTest.RegressTest2 C# (CSharp) Method

        public void RegressTest2()
        {
            var target = new MultipleLinearRegression(2, false);

            Assert.IsFalse(target.HasIntercept);

            double[][] inputs = 
            {
                new double[] { 80, 1 },
                new double[] { 60, 1 },
                new double[] { 10, 1 },
                new double[] { 20, 1 },
                new double[] { 30, 1 },
            };

            double[] outputs = { 20, 40, 30, 50, 60 };


            double error = target.Regress(inputs, outputs);
            Assert.AreEqual(2, target.NumberOfInputs);
            Assert.AreEqual(1, target.NumberOfOutputs);
            double slope = target.Coefficients[0];
            double intercept = target.Coefficients[1];

            Assert.AreEqual(-0.264706, slope, 1e-5);
            Assert.AreEqual(50.588235, intercept, 1e-5);
            Assert.AreEqual(761.764705, error, 1e-5);


            double r = target.CoefficientOfDetermination(inputs, outputs);
            Assert.AreEqual(0.23823529, r, 1e-6);

            string str = target.ToString(null, System.Globalization.CultureInfo.GetCultureInfo("en-US"));

            Assert.AreEqual("y(x0, x1) = -0.264705882352941*x0 + 50.5882352941176*x1", str);
        }