LinearInterpolator Sınıfı

interpolate metodu
Açıklaması şöyle.

The trick here is that you need two arrays to create a spline but you only have one. Thus you need to fabricate an array. You can assume that the input array contains your y values and that the new fabricated array contains your x values so for any given x you have a corresponding y.

Şöyle yaparız.

// To expand the array
public static double[] expand(double[] yarray, int newSize) {

  final int length = array.length;

  // let's calculate the new step size
  double step = (length * 1.0) / newSize;

  // fabricated array of x values
  for(int i = 0; i < length; ++i) {
    x[i] = i;
  }

  // using Linear interpolator but it can be any other interpolator
  LinearInterpolator li = new LinearInterpolator(); // or other interpolator
  PolynomialSplineFunction psf = li.interpolate(x, yarray);

  double[] expandedArray = new double[newSize];
  double position = x[0];
  for (int i = 0; i < newSize; ++i) {
    expandedArray[i] = psf.value(position);
    position += step;
  }
  return expandedArray ;
}