How can I get polynomials for MIMO case using iv4?

Hi.

I'm trying to get the polynomials A(q) and B(a)for an ARX model, in the MIMO case. Matlab function "arx" works only for SISO case, so I'm trying with "iv4". When I have y=y1 and u=[u1 u2] it works, but for y=[y1 y2] and u=[u1 u2] I didn't get success. Can anybody help me with this function or inform another one?

Thanks.

Answer 1

[Rajiv Singh]

ARX does work for MIMO case. So does IV4. Can you post an example?