R help - Aug 2004 - sweave and post "rpart"

Hi,

have anybody positive experience how 
it is possible get the post output from a
rpart-object in a large sweave file or is only the 
less nicely plot function instead of post possible???

\begin{figure}[htbp]
  \begin{center}
<<fig=true,eps=T>>post(dtreeEB,
title="Tree",digits=getOption("digits") - 0,use.n=TRUE)
@
    \caption{Tree1}
  \end{center}
\end{figure}


(1) if the rpart object result contain only the root node, i get this
error:
Error:  chunk 21 
Error in if (is.leaf[lson]) left <- list(left = x[lson], right = x[lson],  : 
	missing value where TRUE/FALSE needed

(2) if the rpart object contains further nodes sweave finished fine, but 
the plot-part contains no tree and "corupted" the tex-document, so
a tex2pdf isn't possible.

Many Thanks,
Christian

On Sat, 21 Aug 2004, Christian Schulz wrote:
> Hi,
>
> have anybody positive experience how
> it is possible get the post output from a
> rpart-object in a large sweave file or is only the
> less nicely plot function instead of post possible???
>
> \begin{figure}[htbp]
>   \begin{center}
> <<fig=true,eps=T>>> post(dtreeEB,
title="Tree",digits=getOption("digits") - 0,use.n=TRUE)
> @
>     \caption{Tree1}
>   \end{center}
> \end{figure}
>
>
> (1) if the rpart object result contain only the root node, i get this
That's not a tree so an error is probably correct if not so unfriendly a
one.  Perhaps you would like to submit a patch to the *authors*, cc the
maintainer.
> error:
> Error:  chunk 21
> Error in if (is.leaf[lson]) left <- list(left = x[lson], right =
x[lson],  :
> 	missing value where TRUE/FALSE needed
>
> (2) if the rpart object contains further nodes sweave finished fine, but
> the plot-part contains no tree and "corupted" the tex-document,
so
> a tex2pdf isn't possible.
post.rpart() does not produce graphics output on the open device.
If you trouble to read its help page, you will see the solution in the
Details: section.

-- 
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 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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with regards;
Santosh

Santosh Kumar wrote:
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> Thanks a lot.
> 
> with regards;
> Santosh
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