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Lets suppose i am having one transfer function as
and the other is
G(z) = 1-2z(-1)/ [1+3z(-1)] //Now inverse is used
If i want to take the transfer fucntion in matlab for further pole zero map, how i will tell matlab that it is z in my TF or z(-1)
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You can take your H(z) and divide by z. So you will have: z^(-1)-2 / z^(-1)+3. Now you can create two vectors containing zeros and poles:
B=[-2 1]; A=[3 1]; zplane(B,A)
If you have function with (all) negative powers, than the last coefficient is for the most negative power and the first coeff is a constant. In case of all positive coeff. you just inverse the order (constant is last).