bandpass.py 文件源码

def filter(self, s, axis=0):
        if self.bandType == 'allpass':
            return s
        if self.bandType == 'allstop':
            return np.zeros_like(s)

        if not self.ziSaved:
            # use padding to find initial zi? XXX - idfah

            self.zi = self.scaleZi(s, axis)
            self.ziSaved = True

        y, self.zi = spsig.lfilter(nc, dc, s, axis=axis, zi=self.zi)
        return y