Dear Alejandro, Thank you very much for your advice. In fact I use GARP and Openmodeller, and they - up to I know - also generate pseudo-absence when modelling. I am searching some R solution to compare the results with OpenModeller outputs. Could you send-me a PDF (or the complete reference) of Lobo 2007?
I never heared about "grasper" and "Biomod". I will give a look on it. Kind regards, miltinho Brazil On 4/23/08, Alejandro González <[EMAIL PROTECTED]> wrote: > > Dear Milton, you have 2 packages for modelling species distribution in > R: grasper and Biomod (by Wilfried Thuiller), but they are all > presence-absence models, so you must generate pseudoabsences for each > species, following recommendations in papers (see Lobo 2007). On the > other side, there are free gis tools to perform presence-only models > (Biomapper, GARP, Openmodeller). Write me if you need if you want some > advice. > > > -- > Alejandro González Fernández de Castro > > Departamento de Biodiversidad y Conservación > Real Jardín Botánico (Consejo Superior de Investigaciones Científicas) > > Plaza de Murillo, 2 > 28014 Madrid - Spain > 00 34 91 4203017 > > ______________________________________________ > 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. > [[alternative HTML version deleted]]
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