Elliptical plot to Frequency response

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Answer 1

[Wayne King]

Hi Tom, you don't want to input the zeros and poles to fvtool(), you want to import the filter numerator and denominator coefficients.

   [b,a] = ellip(zp,pbrip,rejbndatt,1/2);
   fvtool(b,a,'Fs',fs);

[Tom]

Many thanks for this.