Duane has a valid point. If the code fails to run and the author fails to repair the problem, how is worth anything at all? It has now been on the FEX for 9 months, and no repair has been made.
I might also add that naming the function Filter is a bit too close for comfort to the existing function filter.
08 Oct 2012
Filter Design Toolbox
This program can evaluate all filter types characteristics with some adequate inputs.