def cheby2(N, rs, Wn, btype='low', analog=False, output='ba'):
 return iirfilter(N, Wn, rs=rs, btype=btype, analog=analog, output=output, ftype='cheby2')

def cheby2 ( N , rs , Wn , btype = 'low' , analog = False , output = 'ba' ) : return iirfilter ( N , Wn , rs = rs , btype = btype , analog = analog , output = output , ftype = 'cheby2' )
chebyshev type ii digital and analog filter design .