preprocess.py 文件源码

def _plot_multiple_spectrum(signals, fs, labels, colors):
    """
    plot the signals spectrum
    """
    s = Spectrum(block_length=min(2048, signals[0].size), fs=fs,
                 wfunc=np.blackman)
    for sig in signals:
        s.periodogram(sig, hold=True)
    s.plot(labels=labels, colors=colors, fscale='lin')