Calculate output from discrete transfer function and an input scalar

Hi all, I have obtained the discrete transfer function of a plant model using System Identification Toolbox. Now, I want to calculate the output of the mentioned plant model using the obtained transfer function and a scalar input. How do I do this?

Problem paraphrasing: Y(z) = H(z)*X(z) I have the transfer function H(z), how do I calculate an arbitrary time-domain output using an arbitrary time-domain input? Simulink has a block for this job (Discrete Transfer Fcn block), how do I do it with m-code?

[Huilong Wang]

Have your got the answer ? I have exctually the same question as you. Could you please share your answer with me?