linear_regression() -> None
{
    train = source(function="ML.examples.linear_regression.source", initial_state=0, time_interval=0.1);
    m = func(function="ML.LinearRegression.LinearRegressionStream", parameters=[1, 1]);
    f_train = attribute(in=m, attribute="train");
    model = train(in=train, function=f_train, min_window_size=1, max_window_size=100, step_size=1, num_features=1);
}
