详细阐述了波特沃斯低通滤波器的matlab仿真原理及对应的c语言实现过程，读完此资料后，对于巴特沃斯低通滤波器不管从c语言实现还是matlab实现，你都会有很好的理解-Matlab simulation principles elaborated Porter Worth low-pass filter and the corresponding c language implementation process, after reading this information, for Butterworth low-pass filter regardless of language or　a c matlab implementation, you will have a very good understanding