[Rd] bug in function rpart (PR#9245)

Prof Brian Ripley ripley at stats.ox.ac.uk
Fri Sep 22 18:45:30 CEST 2006

You have not given a reproducible example, and you are specifically asked 
not to use R-bugs for contributed packages.

Unless you are able to produce a reproducible example and send it to me as 
maintainer, there is nothing I can do, not even to know if you are using 
rpart correctly.

Please do study the FAQ and posting guide.

On Fri, 22 Sep 2006, yma at biostat.bsc.gwu.edu wrote:

> Full_Name: Yong Ma
> Version: R 2.3.1
> OS: Windows 2000
> Submission from: (NULL) (
> I have a data set containing 3000 observations. while I was trying to build a
> survival tree using the function rpart, I kept getting the following error
> message.
>> tree<-rpart(coxph(Surv(diabv, diabf) ~ weight, data = sgotdat))
> Error in "$<-.data.frame"(`*tmp*`, "yval2", value = c(1, 638)) :
>        replacement has 2 rows, data has 1
> It was confusing to me because I was able to use the coxph function on the same
> data set with no problem at all. So I googled the internet and found some help
> from the following link.
> http://tolstoy.newcastle.edu.au/R/devel/05/04/0598.html
> It suggested that the problem has to do with the length of the data. So I tried
> a subset of my original data containing 2500 observations and BINGO it worked!
> However, I need to run the analysis on the complete data set and the patch
> proposed by Andy is not clear to me how to implement. Please fix the bug
> systematically.
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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

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