Re: [R] Random Forest AUC

2010-10-24 Thread Liaw, Andy
gt; From: r-help-boun...@r-project.org > [mailto:r-help-boun...@r-project.org] On Behalf Of Claudia Beleites > Sent: Saturday, October 23, 2010 3:39 PM > To: r-help@r-project.org > Subject: Re: [R] Random Forest AUC > > Dear List, > > Just curiosity (disclaimer: I never used

Re: [R] Random Forest AUC

2010-10-23 Thread Claudia Beleites
orever", which nececitate the need to find the optimal number of iterations. You don't need that with RF. -Original Message- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of vioravis Sent: Saturday, October 23, 2010 12:15 AM To: r-help@r-

Re: [R] Random Forest AUC

2010-10-23 Thread Changbin Du
", which nececitate the need to find the > > optimal number of iterations. You don't need that with RF. > > > >> -Original Message- > >> From: r-help-boun...@r-project.org > >> [mailto:r-help-boun...@r-project.org] On Behalf

Re: [R] Random Forest AUC

2010-10-23 Thread mxkuhn
tate the need to find the > optimal number of iterations. You don't need that with RF. > >> -Original Message- >> From: r-help-boun...@r-project.org >> [mailto:r-help-boun...@r-project.org] On Behalf Of vioravis >> Sent: Saturday, October 23, 20

Re: [R] Random Forest AUC

2010-10-23 Thread Liaw, Andy
ind the optimal number of iterations. You don't need that with RF. > -Original Message- > From: r-help-boun...@r-project.org > [mailto:r-help-boun...@r-project.org] On Behalf Of vioravis > Sent: Saturday, October 23, 2010 12:15 AM > To: r-help@r-project.org &

Re: [R] Random Forest AUC

2010-10-22 Thread vioravis
Thanks Max and Andy. If the Random Forest is always giving an AUC of 1, isn't it over fitting??? If not, how do you differentiate this from over fitting??? I believe Random forests are claimed to never over fit (from the following link). http://www.stat.berkeley.edu/~breiman/RandomForests/cc_home

Re: [R] Random Forest AUC

2010-10-22 Thread Liaw, Andy
gt; Sent: Friday, October 22, 2010 1:20 AM > To: r-help@r-project.org > Subject: [R] Random Forest AUC > > > Guys, > > I used Random Forest with a couple of data sets I had to > predict for binary > response. In all the cases, the AUC of the training set is > co

Re: [R] Random Forest AUC

2010-10-22 Thread Max Kuhn
Ravishankar, > I used Random Forest with a couple of data sets I had to predict for binary > response. In all the cases, the AUC of the training set is coming to be 1. > Is this always the case with random forests? Can someone please clarify > this? This is pretty typical for this model. > I hav

[R] Random Forest AUC

2010-10-21 Thread vioravis
Guys, I used Random Forest with a couple of data sets I had to predict for binary response. In all the cases, the AUC of the training set is coming to be 1. Is this always the case with random forests? Can someone please clarify this? I have given a simple example, first using logistic regressi