[Biomod-commits] use YWeights or not: nothing changes

[Luigi Maiorano]

Hi Wilfried

the weights are not equally weighted for every row. I was using weights to maintain prevalence. Is this a problem?

thanks

L

-------------------------------------------------------------------------------
Dr. Luigi Maiorano
Dipartimento di Biologia e Biotecnologie "Charles Darwin"
Università di Roma "La Sapienza"
viale dell'Università 32
00185 Roma
tel: +39 0649694262
fax: +39 06491135

Email: luigi.maiorano at uniroma1.it



Il giorno 12/feb/2013, alle ore 12:40, Wilfried Thuiller <wilfried.thuiller at ujf-grenoble.fr> ha scritto:

> HI Luigi,
> What is in ftWeight? Are they equal weighed for every row or not? 
> Cheers
> Wilfried
> 
> 
> 
> Le 12 févr. 2013 à 12:38, Luigi Maiorano a écrit :
> 
>> Hi all
>> 
>> I have a question about using Yweights in BIOMOD_Modeling. Basically if I set it to null, or if I give it values nothing changes (and when I say nothing, I am saying that the cell values for all models are identical!). Is there a bug here? any hint?
>> I'm in R2.15.2 with Biomod2 2.0.0. The two command lines that I am using are: 
>> # RUN THE MODELS WITH WEIGHTS
>> ftBiomodModelOut_W <- BIOMOD_Modeling(ftBiomodData, models=c('GLM', 'GBM', 'GAM', 'ANN', 'CTA', 'MARS', 'RF'), models.options=ftBiomodOption, NbRunEval=1, DataSplit=80, Yweights=ftWeight, VarImport=3,models.eval.meth=c('TSS', 'ROC'), SaveObj=TRUE, rescal.all.models=TRUE)
>> 
>> #RUN THE MODELS WITHOUT WEIGHTS
>> ftBiomodModelOut <- BIOMOD_Modeling(ftBiomodData, models=c('GLM', 'GBM', 'GAM', 'ANN', 'CTA', 'MARS', 'RF'), models.options=ftBiomodOption, NbRunEval=1, DataSplit=80, Yweights=NULL, VarImport=3,models.eval.meth=c('TSS', 'ROC'), SaveObj=TRUE, rescal.all.models=TRUE)
>> 
>> 
>> thanks for the help
>> 
>> Luigi
>> 
>> -------------------------------------------------------------------------------
>> Dr. Luigi Maiorano
>> Dipartimento di Biologia e Biotecnologie "Charles Darwin"
>> Università di Roma "La Sapienza"
>> viale dell'Università 32
>> 00185 Roma
>> tel: +39 0649694262
>> fax: +39 06491135
>> 
>> Email: luigi.maiorano at uniroma1.it
>> 
>> 
>> 
>> _______________________________________________
>> 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
> 
> ERC Starting Grant TEEMBIO project: http://www.will.chez-alice.fr/Research.html
> FP6 European EcoChange project: http://www.ecochange-project.eu
> 
> 
> 
> 
> 
> 
>