transforms.py 文件源码

def apply(self, data):
        nyq = self.f / 2.0
        cutoff = min(self.f, nyq-1)
        h = signal.firwin(numtaps=101, cutoff=cutoff, nyq=nyq)

        # data[i][ch][dim0]
        for i in range(len(data)):
            data_point = data[i]
            for j in range(len(data_point)):
                data_point[j] = signal.lfilter(h, 1.0, data_point[j])

        return data