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I use Scilab.

Is is possible using Scilab primatives like poly(), horner(), etc., to generate and display a discrete time transfer function with only negative powers of z?

I have tried a number of things. When multiplying the numerator alone by z^-n, n being the highest positive power of z, Scilab will just show the original numerator divided by z^n.

When multiplying Scilab's transfer function output by z^-n / z^-n, it merely takes that as 1 and does nothing.

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