hello, some weeks ago I asked if there is an equivalent of step(lm) for gam, and Simon Wood informed me that there isn't but it will eventually be done. Now I found grasp.step.gam {grasper} and wonder if it would be possible to rewrite/extract (? I don't now how it is called or how it works - I am not experienced in programming) this command for the use outside GRASP-R. Perhaps this way is less work intensive but of course this command doesn't use GCV/UBRE scores but anova. Is there an argument not to use this function inside GRASP-R even though it's purpose is not spatial? thanks for your help, cheers Martin