[R] How to use a validation set rather than the default cross-validation in rpart() ?

2006-05-02 Thread Quin Wills
I want use a validation set for my classification tree rather than the default 10-fold validation in rpart() but can't see which arguments to use to get this right. Advice appreciated thanks. I assume that this is possible! [[alternative HTML version deleted]] __

Re: [R] How to use a validation set rather than the default cross-validation in rpart() ?

2006-05-02 Thread Uwe Ligges
Quin Wills wrote: > I want use a validation set for my classification tree rather than the > default 10-fold validation in rpart() but can't see which arguments to use > to get this right. Advice appreciated thanks. I assume that this is > possible! You cannot for the internal algorithm that opti

Re: [R] How to use a validation set rather than the default cross-validation in rpart() ?

2006-05-03 Thread Quin Wills
hz.ch Subject: Re: [R] How to use a validation set rather than the default cross-validation in rpart() ? Quin Wills wrote: > I want use a validation set for my classification tree rather than the > default 10-fold validation in rpart() but can't see which arguments to use > to get

Re: [R] How to use a validation set rather than the default cross-validation in rpart() ?

2006-05-03 Thread Prof Brian Ripley
nk it would be a good idea? > -Original Message- > From: Uwe Ligges [mailto:[EMAIL PROTECTED] > Sent: 03 May 2006 07:53 > To: Quin Wills > Cc: r-help@stat.math.ethz.ch > Subject: Re: [R] How to use a validation set rather than the default > cross-validation in rpart()

Re: [R] How to use a validation set rather than the default cross-validation in rpart() ?

2006-05-03 Thread Quin Wills
- From: Prof Brian Ripley [mailto:[EMAIL PROTECTED] Sent: 03 May 2006 10:33 To: Quin Wills Cc: 'Uwe Ligges'; r-help@stat.math.ethz.ch Subject: Re: [R] How to use a validation set rather than the default cross-validation in rpart() ? On Wed, 3 May 2006, Quin Wills wrote: > Many thanks.