Accord.Tests.Statistics.MultipleLinearRegressionTest.RegressTest4 C# (CSharp) Method

        public void RegressTest4()
        {
            int count = 1000;
            double[][] inputs = new double[count][];
            double[] output = new double[count];

            for (int i = 0; i < inputs.Length; i++)
            {
                double x = i + 1;
                double y = 2 * (i + 1) - 1;
                inputs[i] = new[] { x, y };
                output[i] = 4 * x - y + 3;
            }

            {
                MultipleLinearRegression target = new MultipleLinearRegression(2, true);

                double error = target.Regress(inputs, output);

                Assert.AreEqual(2, target.NumberOfInputs);
                Assert.AreEqual(1, target.NumberOfOutputs);

                Assert.AreEqual(3, target.Coefficients.Length);
                Assert.IsTrue(target.HasIntercept);
                Assert.AreEqual(0, error, 1e-10);
            }

            {
                MultipleLinearRegression target = new MultipleLinearRegression(2, false);

                double error = target.Regress(inputs, output);

                Assert.AreEqual(2, target.NumberOfInputs);
                Assert.AreEqual(1, target.NumberOfOutputs);

                Assert.AreEqual(2, target.Coefficients.Length);
                Assert.IsFalse(target.HasIntercept);
                Assert.AreEqual(0, error, 1e-10);
            }
        }