public void TestLinearRegressionTest()
{
var inputs = new double[][] {
// age, smokes?
new double[] { 55, 0 },
new double[] { 28, 0 },
new double[] { 65, 1 },
new double[] { 46, 0 },
new double[] { 86, 1 },
new double[] { 56, 1 },
new double[] { 85, 0 },
new double[] { 33, 0 },
new double[] { 21, 1 },
new double[] { 42, 1 },
};
var output = new double[] {
// Whether each patient had lung cancer or not
0, 0, 0, 1, 1, 1, 0, 0, 0, 1
};
// Accord.NET
var analysis = new MultipleLinearRegressionAnalysis();
analysis.OrdinaryLeastSquares.UseIntercept = true;
analysis.OrdinaryLeastSquares.IsRobust = false;
analysis.Learn(inputs, output);
// Estimator
var x = DataMap.FromJagged(inputs, new string[] { "age", "smokes" });
var y = new DataMap();
y.Add("lung_cancer", output);
var est = new LinearRegressionEstimator();
est.Fit(x, y);
var model = est.Model;
Assert.Equal(analysis.Coefficients.Count, model.Coefficients.Count);
Assert.Equal(analysis.Coefficients[0].Value, model.Coefficients[0].Value);
Assert.Equal(analysis.Coefficients[1].Value, model.Coefficients[1].Value);
Assert.Equal(analysis.Coefficients[2].Value, model.Coefficients[2].Value);
}