[R] Random Forest

[Jim Porzak]

Google "random forests" see Leo Brieman's site, Wikipedia, & esp link
at bottom of wikipedia page to Andy & Matt's article in RNews

I did a DMA/AC webinar in January. Slides are at:
http://www.porzak.com/JimArchive/JimPorzak_RFwithR_DMAAC_Jan07_webinar.pdf


On 4/23/07, Ron Michael <ron_michael70 at yahoo.com> wrote:
> Dear all R gurus,
>
> I am really sorry if my query embraces anyone. Can anyone give me some introductory papers or suggestions about what Random Forest is?
>
> Thanks and regards,
>
> ----- Original Message ----
> From: Weiwei Shi <helprhelp at gmail.com>
> To: Ruben Feldman <frubeng at gmail.com>
> Cc: r-help at stat.math.ethz.ch
> Sent: Monday, April 23, 2007 8:56:29 PM
> Subject: Re: [R] Random Forest
>
> Hi, Ruben:
>
> fit$confusion
>
> if you provide your test data, then you can also access the confusion
> matrix of test data by
>
> fit$test$confusion
>
> there are details of how to use randomForest by reading:
> ?randomForest
>
> HTH,
>
> Weiwei
>
> On 4/22/07, Ruben Feldman <frubeng at gmail.com> wrote:
> > Hi,
> >
> > I am trying to print out my confusion matrix after having created my random
> > forest.
> > I have put in this command:
> > fit<-randomForest(MMS_ENABLED_HANDSET~.,data=dat,ntree=500,mtry=14,
> > na.action=na.omit,confusion=TRUE)
> >  but I can't get it to give me the confusion matrix, anyone know how this
> > works?
> >
> > Thansk!
> >
> > Ruben
> >
> >         [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-help at stat.math.ethz.ch 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.
> >
>
>
> --
> Weiwei Shi, Ph.D
> Research Scientist
> GeneGO, Inc.
>
> "Did you always know?"
> "No, I did not. But I believed..."
> ---Matrix III
>
> ______________________________________________
> R-help at stat.math.ethz.ch 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.
>
>
>
>
>
>
>
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at stat.math.ethz.ch 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.
>


-- 
HTH,
Jim Porzak
San Francisco, CA
http://www.linkedin.com/in/jimporzak