On Fri, Apr 12, 2013 at 10:37 AM, Lauria, Valentina <valentina.lau...@nuigalway.ie> wrote: > Hi, > > I am trying to predict the habitat suitability of lobster with GAMs. I need > to produce a map in ArcGis of the predicted densities. I did some search and > the function predict.gam seems to do the job. > > Is this the right way to do it? when you apply the function you get the > predicted values (different from your input data points) but I do not > understand what is the procedure with the spatial coordinates, I mean what > lat and long have the new points? Can I use the same ones of my observations?
I suspect you'll get a better response if you: a) ask on R-sig-geo, the mailing list for all things R and mappy b) try and ask with a reproducible example - it doesn't have to be your data, but something similar, and small, and that we can run to get a better idea of your problem. Show us how you are running predict.gam, at least, and what your data looks like. To get data from R into ArcGIS you probably want to either use the raster package to create a grid of values, or the rgdal package to create a shapefile of point locations and estimates. Exactly how you get that from your predict.gam results is a bit guesswork until we know a bit more about how you are running predict.gam.... Barry ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
