I'm figuring this out now and I'll let you know when it is resolved... On Tue, Jun 30, 2009 at 11:31 AM, Damian Krstajic<dkrsta...@hotmail.com> wrote: > > Hello, > > We have a system which creates thousands of regression/classification models > and in cases where we have only one input variable NaiveBayes throws an > error. Maybe I am mistaken and I shouldn't expect to have a model with only > one input variable. > > We use R version 2.6.0 (2007-10-03). We use caret (v4.1.19), but have tested > similar code with klaR (v.0.5.8), because caret relies on NaiveBayes > implementation from klaR. I get different error messages from caret than from > klaR so I will provide the code for caret usage and klaR usage. > > Here is the code which uses the iris dataset. > >> library(klaR); > Loading required package: MASS >> X<-iris["Sepal.Length"]; >> Y<-iris["Species"]; >> mnX<-as.matrix (X); >> mnY<-as.matrix (Y); >> cY<-factor(mnY); >> d <- data.frame (cbind(mnX,cY)); >> m<-NaiveBayes(cY~mnX, data=d); >> predict(m); > Error in as.vector(x, mode) : invalid argument 'mode' >> library(caret); > Loading required package: lattice >> mCaret<-train(mnX,cY,method="nb",trControl = trainControl(method = "cv", >> number = 10)); > Loading required package: class > Fitting: usekernel=TRUE > Fitting: usekernel=FALSE >> predicted <- predict(mCaret, newdata=mnX); > Error in 1:nrow(newdata) : NA/NaN argument >> > > We use caret to call NaiveBayes and we don't have any error messages in cases > where the number of input variables is greater than 1. > > Cheers > DK > > _________________________________________________________________ > [[elided Hotmail spam]] > > [[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. >
-- Max ______________________________________________ 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.
