package com.company;
import java.util.ArrayList;
import java.util.List;
/**
* Created by Daniel on 2018-03-03.
*/
public class Main {
public static void main
(String[] args
) {
List<Double> x = new ArrayList<Double>();
List<Double> y = new ArrayList<Double>();
x.add(1.0);
x.add(2.0);
x.add(3.0);
x.add(4.0);
y.add(1.0);
y.add(4.0);
y.add(9.0);
y.add(16.0);
double punkt = 15;
double wartosc = lagrangeInterpolation(x,y,punkt);
System.
out.
println("W punkcie "+punkt
+" wartość "+ wartosc
);
}
public static double lagrangeInterpolation
(List xs,
List ys,
double x
){
double t;
double y = 0.0;
for(int k = 0; k< xs.size(); k++){
t = 1.0;
for(int j = 0; j < xs.size() ; j++){
if(j != k ){
double a
= (Double) xs.
get(j
);
double b
= (Double) xs.
get(k
);
t=t*((x-a)/(b-a));
}
}
double c
= (Double) ys.
get(k
);
y += t*c;
}
return y;
}
}
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