[R] Modeling presence only data in R

Jorge Luis Renteria jlrenteriab at gmail.com
Thu Apr 10 18:27:15 CEST 2014

Dear Friends

I am running some SDM to assess the potential distribution of some plant 
species. We want to run 3 models using presence data only (BIOBLIM, DOMIAN, 
MAHAL). I am using the Dismo library for R.

We would like to evaluate the three models using the AUC the Kappa COR 
(Pearson correlation). When I run the evaluate function “e<-evaluate (p,a, 
model,predictors)”from the Dismo package I get only the AUC>

Can someone advice or provide the scripts/ package to get the Kappa and COR 
of the models?

Thank you very much for your help



On Wednesday, 23 April 2008 16:07:11 UTC+2, Alejandro González 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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