Question: how to use zpk function in matlab?
Answer: sys = zpk(M) specifies a static gain M . sys = zpk(Z,p,k,ltisys) creates a zero-pole-gain model with properties inherited from the LTI model ltisys (including the sample time). To create an array of zpk model objects, use a for loop, or use multidimensional cell arrays for Z and P , and a multidimensional array for K .