r_tuple_former.py 文件源码

def low_pass_filter(x, order, cutOffFrequency, samplingFrequency):
    nyq = samplingFrequency*0.5
    cut = cutOffFrequency/nyq
    b, a = signal.butter(order, cut, btype='low')
    y = signal.filtfilt(b, a, x)
    return y