I want to use Matlab for simulation of a simple ARMA model and I have the following question. Is there any difference between using "idsim" with "poly2th" from Ident toolbox and direct use of "filter"? As far as I can see both ways idsim/poly2th and filter would produce the same result, but I just want to be sure. Thanks ================================================================= Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =================================================================