连续曲线近似地刻画或比拟平面上离散点组所表示的坐标之间的函数关系的一种数据处理方法。用解析表达式逼近离散数据的一种方法-Continuous curve approximation to characterize or compare groups of discrete points on the plane expressed by a function of the relationship between the coordinates of a data processing method. Approximation using the analytical expression of a method of discrete data