Hi,
I have installed Rgraphviz successfully refer to the following page:
http://cos.name/bbs/read.php?tid=15350
Generally, It can be done through:
1. Install or update your R to 2.9.0
2. Install graphviz of version 2.20.3.1 from the following link: 
http://www.graphviz.org/pub/graphviz/stable/windows/graphviz-2.20.3.1.msi
 newer version can not used by Rgraphviz.
3. Add the bin directory of the graphviz to the path environment.
4. Restart your R program and library(Rgraphviz).

Hope this is of use to you.

Kasper Daniel Hansen ??:
> 1) The output of the configure script actually tells you what you need 
> to do in order to fix your problem - you need to add Graphviz to your 
> pkg-config.
>
> 2) Nevertheless I have added some further fall back mechanism so it 
> should work for your case now (please report back if you try, I have 
> no way of testing it), this has been fixed in Rgraphviz 1.23.3, just 
> commit to the devel branch of Bioconductor.
>
> Kasper
>
> On Jun 29, 2009, at 2:07 , anupam sinha wrote:
>
>> Hi ,
>>          Attached with this mail is all of the output from my 
>> Rgraphviz installation attempt. Thanks in advanceRegards,
>>
>> Anupam Sinha
>> <Rgraphviz_installation>
>
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-- 
Pengcheng Yang
PhD Candidate
IOZ,CAS
email: <yangpc@ioz.ac.cn>


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