Problem using variable='z^-1' in Z transform with Z^-1 format
5 views (last 30 days)
Hi Dears ,
What is the difference between one step and two step to define the 'variable'='z^-1'?
I want Z transform function 1/z^3 in term of z^-1 and the two step is ok not one step.
See the Matlab doc for tf, section: "Specify Polynomial Ordering in Discrete-Time Transfer Function"
den=[1 0 0 0];
% Two step is OK!
% One step is not OK!
X1 not equal X2
Many thanks to dear @Paul
Walter Roberson on 30 Sep 2022
Setting the Variable property afterwards just changes the Variable property, without reinterpretting the matrices. It is not a conversion operation, it is just rewriting the label.