[Biomod-commits] qual.th and the models in the ensemble

[Wilfried Thuiller]

Hi there,

Have you checked the evaluation tables? Which criteria do you use for the quality threshold? 

Best
Wilfried


Le 20 déc. 2011 à 14:58, Frederico Mestre a écrit :

> Hello all:
> 
> 
> 
> I’m running some ensembles and projecting them in a GIS.
> 
> 
> 
> First, I tried to run an ensemble using all the models (not setting any value to “qual.th”). And then I visualize the results in a GIS. The result maps looked pretty good (apparently the models correctly classified areas where the species occurs as those where it is more probable, and it might have predicted the locations of some new populations).
> 
> 
> 
> These results, apparently, are good. But, when I run another ensemble trying to use only the best models (setting the qual.th=0.8, or even 0.7), I get the error:
> 
> 
> 
> Error in if (sum(ProbData) != 0) { :
> 
> missing value where TRUE/FALSE needed
> 
> 
> 
> What does this mean? None of the models has a value higher than 0.8 (or 0.7)? How is it possible if the models apparently are good in classifying the areas where the species occurs?
> 
> What am I missing?
> 
> 
> 
> Thanks,
> 
> Frederico
> 
> _______________________________________________
> Biomod-commits mailing list
> Biomod-commits at lists.r-forge.r-project.org
> https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/biomod-commits

--------------------------
Dr. Wilfried Thuiller
Laboratoire d'Ecologie Alpine, UMR CNRS 5553
Université Joseph Fourier
BP53, 38041 Grenoble cedex 9, France
tel: +33 (0)4 76 51 44 97
fax: +33 (0)4 76 51 42 79

Email: wilfried.thuiller at ujf-grenoble.fr
Personal website: http://www.will.chez-alice.fr
Team website: http://www-leca.ujf-grenoble.fr/equipes/emabio.htm

FP6 European MACIS project: http://www.macis-project.net
FP6 European EcoChange project: http://www.ecochange-project.eu






-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.r-forge.r-project.org/pipermail/biomod-commits/attachments/20111220/22cdf2d8/attachment.htm>