Daniel C. McEwen wrote: > I am developing models of benthic invertebrate abundance but am uncertain > of the best way to treat the spatial data. I have lat, long, and depth. > I thought about detrending, but then wouldn't I have to double detrend > (first with respect to lat and long and second with depth)? > Alternatively, would it make sense to just include the interaction of lat, > long, and depth in the model as a covariable? > > I think the honest answer has to be that it's impossible to say from what you've described: it depends on what you're trying to do, and what the data looks like. I'm sure there are several things that could be tried., but the devil will be in the detail, so it'll be easier if you sit down with someone to discuss your data and what you want from it. The good news is that your university has a statistical consulting service, so I would recommend you try that.
Bob -- Bob O'Hara Department of Mathematics and Statistics P.O. Box 68 (Gustaf Hällströmin katu 2b) FIN-00014 University of Helsinki Finland Telephone: +358-9-191 51479 Mobile: +358 50 599 0540 Fax: +358-9-191 51400 WWW: http://www.RNI.Helsinki.FI/~boh/ Journal of Negative Results - EEB: www.jnr-eeb.org
