public void Linear_Regression_Test_House_Predictions_Normal()
{
// test house prices based on ft-sq and no# bedrooms
Matrix x = new [, ]
{
{ 2104, 3 },
{ 1600, 3 },
{ 2400, 3 },
{ 1416, 2 },
{ 3000, 4 },
{ 1985, 4 },
{ 1534, 3 },
{ 1427, 3 },
{ 1380, 3 },
{ 1494, 3 }
};
Vector y = new[]
{
399900,
329900,
369000,
232000,
539900,
299900,
314900,
198999,
212000,
242500
};
LinearRegressionGenerator generator = new LinearRegressionGenerator()
{
LearningRate = 0.01, MaxIterations = 400, Lambda = 0, NormalizeFeatures = true
};
var model = generator.Generate(x.Copy(), y.Copy());
var priceEqns = model.Predict(new Vector(new double[] { 1650, 3 }));
// CK 150929: increased due to improvements in optimisation
double actualEqns = 295107.0d;
Almost.Equal(actualEqns, System.Math.Round(priceEqns, 0), 5000);
}
//[Test]
public void Save_And_Load_LinearRegression()
{
Matrix x = new [, ]
{
{ 2104, 3 },
{ 1600, 3 },
{ 2400, 3 },
{ 1416, 2 },
{ 3000, 4 },
{ 1985, 4 },
{ 1534, 3 },
{ 1427, 3 },
{ 1380, 3 },
{ 1494, 3 }
};
Vector y = new[]
{
399900,
329900,
369000,
232000,
539900,
299900,
314900,
198999,
212000,
242500
};
LinearRegressionGenerator generator = new LinearRegressionGenerator()
{
LearningRate = 0.01, MaxIterations = 400, Lambda = 1
};
var model = generator.Generate(x.Copy(), y.Copy()) as LinearRegressionModel;
Serialize(model);
var lmodel = Deserialize <LinearRegressionModel>();
Assert.AreEqual(model.Theta, lmodel.Theta);
}
public void Linear_Regression_Test_House_Predictions_Regularized()
{
// test house prices based on ft-sq and no# bedrooms
Matrix x = new [, ]
{
{ 2104, 3 },
{ 1600, 3 },
{ 2400, 3 },
{ 1416, 2 },
{ 3000, 4 },
{ 1985, 4 },
{ 1534, 3 },
{ 1427, 3 },
{ 1380, 3 },
{ 1494, 3 }
};
Vector y = new[]
{
399900,
329900,
369000,
232000,
539900,
299900,
314900,
198999,
212000,
242500
};
LinearRegressionGenerator generator = new LinearRegressionGenerator()
{
LearningRate = 0.01, MaxIterations = 400, Lambda = 1
};
var model = generator.Generate(x.Copy(), y.Copy());
var priceGrad = model.Predict(new Vector(new double[] { 1650, 3 }));
double actualGrad = 280942d;
Assert.AreEqual(actualGrad, System.Math.Round(priceGrad, 0));
}
