Re: [R-sig-eco] low predicted vales in GAMs (Anna Renwick)

2009-12-12 Thread Highland Statistics Ltd.
-- Message: 1 Date: Fri, 11 Dec 2009 11:43:40 - From: Anna Renwick anna.renw...@bto.org Subject: [R-sig-eco] low predicted vales in GAMs To: r-sig-ecology@r-project.org Message-ID:

Re: [R-sig-eco] low predicted vales in GAMs

2009-12-12 Thread Nicholas Lewin-Koh
Hi Anna, A couple of thoughts: Did you try fitting a straight Poisson model? The quasi Poisson model is assuming the variance is not a strict function of the mean, and that may be interacting with your weighting function. Also how exactly are the weights defined? is it (# squares counted)/(total