Hi Miltinho, There is a brief review on issues about and a new method for modelling presence-only data in DOI 10.1007/s10531-007-9270-7. Hope it is useful.
Cheers, Jin -------------------------------------------- Jin Li, PhD Spatial Modeller/ Computational Statistician Marine & Coastal Environment PMD, Geoscience Australia GPO Box 378 Canberra, ACT 2601 Australia Ph: 61 (02) 6249 9899 Fax: 61 (02) 6249 9956 email: [EMAIL PROTECTED] -------------------------------------------- -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of milton ruser Sent: Wednesday, 8 October 2008 3:47 To: R Help Subject: [R] Ecological Niche Modelling on R Dear all, I have strong interest on Ecological Niche Model, which in general use a set of environmental variables (continuous, categorical etc) and Presence (or Presense/Absence) records for species. I think that "grasp" and "adehabitat" packages could help me on these tasks. My input layers are on ASC format, and the record of species is a data-frame with X, Y, name of species. Note that in general we don´t have real absence data. Could someone give some advice how can I use "grasp" and/or "adehabitat" to generate my predictive models? Best regards, Miltinho AStronauta brazil [[alternative HTML version deleted]] ______________________________________________ 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.
