说明：  各种插值方法的效果比较 线性内插法，内插法，三次多项式内插法，多项式拟合法 将这些内插的结果及原先的采样点画在同一个图
(The effect of various interpolation methods compared linear interpolation, interpolation, cubic polynomial interpolation, polynomial fitting interpolation of these results and the original sample at the same Chart stipple)