本源程序是基于MATLAB平台开发的一个滤波器的小插件，本滤波器是低通滤波器，可以滤掉低于2Hz的频率，如果想得到带通滤波器或者高通滤波器，将里面的某些语句更改即可。-The source is a filter based on MATLAB platform development of small plug-in, this filter is a low-pass filter, it can filter out frequencies below 2Hz, if want to ge