ncauer Analog prototype for Cauer filter. [Zz, Zp, Zg] = ncauer(Rp, Rs, n) n: Filter Order Rp: Peak-to-peak passband ripple in dB Rs: Stopband attenuation in dB Zz: Zeros Zp: Poles Zg: Gain It gives an analog prototype for Cauer filter (elliptic filter) of nth order, with a Peak-to-peak passband ripple of Rp and a stopband attenuation of Rs. This function is same as ellipap() only order of input argument is different, This function is only for octave compatibility only Sonu Sharma, RGIT Mumbai FOSSEE, IIT Bombay