Hi,
If it were there I would use it. I am interested in limiting the model of my hemodynamic response to roughly 2-10 sec post-event. I have been limiting my fit to this interval with the EXPR function, but I think I am poorly fitting my data with the functions I chose, (1-cos(2pi*x),(sin(2pi*x), sin(3pi*x). So, I want to go back to something more straightforward, i.e., a single function. -WAV looks to be as straightforward as one can get. GAM fits things similarly, but lasts longer, and it is a bit less straightforward how parameter changes change its shape.
-Jim