[R] which classification package in R can assign sample weight?

[Prof Brian Ripley]

On Tue, 23 Jan 2007, Weiwei Shi wrote:

> Just checked
> ?lrm

(I would use glm or multinom.)

> ?nnet
> ?rpart
> ?ppr
>
> thanks.
>
> but wondering if the last one can do classification?

Yes, it has been so used since it can do multivariate outcomes.  See 
Chapter 4 of my PRNN book, for example.


> On 1/23/07, Prof Brian Ripley <ripley at stats.ox.ac.uk> wrote:
>> Almost all methods I know of do: logistic regression, neural nets,
>> classification trees, PPR ....
>> 
>> Have you looked at the help pages for any of these?
>> 
>> On Tue, 23 Jan 2007, Weiwei Shi wrote:
>> 
>> > Hi,
>> >
>> > I am looking for some function implemented in R for classification,
>> > which has an option to allow me to assign sample weights in learning
>> > process? Implementation of a wrapper function is possible but I am
>> > curious if it already exists somewhere.
>> >
>> > Thanks,
>> >
>> >
>> 
>> --
>> Brian D. Ripley,                  ripley at stats.ox.ac.uk
>> Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
>> University of Oxford,             Tel:  +44 1865 272861 (self)
>> 1 South Parks Road,                     +44 1865 272866 (PA)
>> Oxford OX1 3TG, UK                Fax:  +44 1865 272595
>> 
>
>
>

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595