java 线性插值

 public static double[] interpolations(double[] x, double[] y, double[] z) {
   double[] interV = new double[z.length];
   UnivariateInterpolator interpolator = new LinearInterpolator();
   UnivariateFunction function = interpolator.interpolate(x, y);
   for (int i = 0; i < z.length; i++) {
     interV[i] = function.value(z[i]);
   }
   return interV;
 }
 public static void (String[] args) {
   //已知下标1,3,5,7,9对应的数值为0.1, 0.5, 2.2, 1.2, 3.1，求下标2, 4, 6, 8对应的数值
   double[] x = new double[] {1, 3, 5, 7, 9};
   double[] y = new double[] {0.1, 0.5, 2.2, 1.2, 3.1};
   double[] z = new double[] {2, 4, 6, 8};
   double[] v = interpolations(x, y, z);
   System.out.println(Arrays.toString(v));
 }