きんじじｋｌｌ - 経済統計練習帳

package math;
 
import org.apache.commons.math3.fitting.WeightedObservedPoints;
import org.apache.commons.math3.fitting.PolynomialCurveFitter;
 
class pro{
 
public static void main(String[] args) {
 
pro test=new pro();
}
 
pro(){
 
final WeightedObservedPoints obs = new WeightedObservedPoints();
obs.add(0, 0);
obs.add(1, 2);
obs.add(2, 4);
obs.add(3, 6);
obs.add(4, 8);
 
final PolynomialCurveFitter fitter = PolynomialCurveFitter.create(3);
 
final double[] coeff = fitter.fit(obs.toList());
 
System.out.println(coeff[2]);
 
 
 
}
 
}