Re: [R] Modeling presence only data in R

From: milton ruser <milton.ruser_at_gmail.com>
Date: Wed, 23 Apr 2008 11:40:17 -0300

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 <jano_at_rjb.csic.es> 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
>
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