stuffr.py 文件源码

def comprz_dB(xx,fr=0.05):
    """ Compress signal in such a way that is logarithmic but also avoids negative values """
    x = numpy.copy(xx)
    sh = xx.shape
    x = x.reshape(-1)
    x = comprz(x)
    x = numpy.setdiff1d(x,numpy.array([0.0]))
    xs = numpy.sort(x)
    mini = xs[int(fr*len(x))]
    mn = numpy.ones_like(xx)*mini
    xx = numpy.where(xx > mini, xx, mn)
    xx = xx.reshape(sh)
    return(10.0*numpy.log10(xx))