def stZCR(frame):
    """Computes zero crossing rate of frame"""
    count = len(frame)
    countZ = numpy.sum(numpy.abs(numpy.diff(numpy.sign(frame)))) / 2
    return (numpy.float64(count-1.0) / numpy.float64(countZ))
dataset/ETHPy150Open tyiannak/pyAudioAnalysis/audioFeatureExtraction.py/stZCR/swapped operands of `/`