Hi I am an engineer and am running the package mgcv and specifically the command gamm (generalized additive mixed modelling), with random effects. i have a few queries: 1. When I run the command with 1000/2000 observations, it runs ok. However, I would like to see the results as in vis.gam command in the same package, with the 3-d visuals. It appears no such option is available for gamm in the manual. I was wondering if someone has used this before and obtained the plots similar to vis.gam, which I believe plots the predictions automatically. I have used 'te' command for two way interaction of the smooth terms, plus some paramteric terms. 2. I am not sure how the gamm results are saved, and if prediction is at all possible. The documentations talks about gam in detail, but not gamm. 3. When I use my entire dataset (approx 58000 obs, and, well even with 10000 observations) I am running against memory all the time (it says cannot allocate a vector of size 'some number). I used it on a 3GB RAM machine and I am suspicious if it is something else. Many thanks in advance, Zia ********************************************************** Zia Wadud PhD Student Centre for Transport Studies Department of Civil and Environmental Engineering Imperial College London London SW7 2AZ Tel +44 (0) 207 594 6055
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