analysis of binomial data with rpart/tree

[Mazerolle, Dan]

Hi all,

I am using the rpart library to construct wildlife distribution models.
As many of the sites that we have sampled have been sampled over many
years, we would like to evaluate binomial responses (number of years
that the species was present vs. number of years it was absent at a
particular site). Does anybody know if the rpart function can evaluate
binomial responses? If not, are there other R of S-plus functions that
would be able to handle binomial responses.

Thanks for your time.

Dan Mazerolle

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[Prof Brian Ripley]

rpart allows user-specified splits, so yes, it can.

On Mon, 15 May 2006, Mazerolle, Dan wrote:

> Hi all,
>
> I am using the rpart library to construct wildlife distribution models.
> As many of the sites that we have sampled have been sampled over many
> years, we would like to evaluate binomial responses (number of years
> that the species was present vs. number of years it was absent at a
> particular site). Does anybody know if the rpart function can evaluate
> binomial responses? If not, are there other R of S-plus functions that
> would be able to handle binomial responses.
>
> Thanks for your time.
>
> Dan Mazerolle

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