data_load.py 文件源码

def low_filter(data, sample_rate=1000):
    f_signal = rfft(data)
    l = int(len(f_signal)*5.0/sample_rate);
    cut_f_signal = f_signal.copy()
    cut_f_signal[0:l+1] = 0
    cut_f_signal[len(f_signal) + 1 - l :] = 0
    cut_signal = irfft(cut_f_signal)
    return cut_signal