public Interpolation localInterpolate(List <double> xBegin, int size, List <double> yBegin, int localisation, ConvexMonotoneInterpolation prevInterpolation, int finalSize) { int length = size; if (length - localisation == 1) // the first time this // function is called { return(new ConvexMonotoneInterpolation(xBegin, size, yBegin, quadraticity_, monotonicity_, forcePositive_, length != finalSize)); } ConvexMonotoneInterpolation interp = prevInterpolation; return(new ConvexMonotoneInterpolation(xBegin, size, yBegin, quadraticity_, monotonicity_, forcePositive_, length != finalSize, interp.getExistingHelpers())); }