ncauer Analog prototype for Cauer filter. [Zz, Zp, Zg] = ncauer(Rp, Rs, n) [Zz, Zp] = ncauer(Rp, Rs, n) Zz = ncauer(Rp, Rs, n) n: Filter Order Rp: Peak-to-peak passband ripple Rs: Stopband attenuation This is an Octave function. It designs an analog prototype for Cauer filter of nth order, with a Peak-to-peak passband ripple of Rp and a stopband attenuation of Rs.