小中大参见Origin中的介绍,取5时为5点平滑。
Smoothing using Adjacent Averaging
To smooth the active data plot by averaging adjacent data points, select Analysis:Smoothing:Adjacent Averaging. This menu command opens the Smoothing dialog box. Specify a number that controls the degree of smoothing. If you enter an odd number n, then n points are used to calculate each averaged result. If you enter an even number m, then m+1 points are used to calculate each averaged result. The smoothed value at index i is the average of the data points in the interval [i-(n-1)/2, i+(n-1)/2], inclusive.
这种平滑的原理:对前n个数求和取平均赋给下一个数,依次移动直到数据末尾,最后形成一新的数组,注意n的取值要合适。