filtering.py 文件源码

def butter_lowpass_filtfilt(data, *, cutoff, fs, order=5):
    """Lowpass filter data using a zero-phase filt-filt butterworth
    filter.

    Performs zero-phase digital filtering by processing the input data
    in both the forward and reverse directions.
    """
    b, a = butter_lowpass(cutoff, fs, order=order)
    y = filtfilt(b, a, data, padlen=150)
    return y