Matthew,

My Fault I should have sent you to the current release cycle page. The link was 
for the old 2.6 Bioconductor release, sorry about that. :(
Personally the easies way to install any bioconductor package is to open R copy 
and paste the following code:

source("http://bioconductor.org/biocLite.R";)
biocLite("Rdisop")
The main page for Rdisop is here : 
http://www.bioconductor.org/packages/release/bioc/html/Rdisop.html . This time 
I've given you the correct page/ current release :)

As for the rJava and rCDK. It can be difficult to install. I'm going to assume 
that you're on Linux as you said you tried to download the source code. In this 
case you want to make sure that you have your $JAVA_HOME path set. In the 
terminal first try:

sudo R CMD javareconf
## If that doesn't work then try

echo $JAVA_HOME
## if that returns nothing try:

export JAVA_HOME=/usr/lib/jvm/java-6-sun
This page looks like quite a good explanation : 
http://stackoverflow.com/questions/3311940/r-rjava-package-install-failing

Hope it helps,

Paul



On Feb 2, 2012, at 7:26 PM, matthew.ttd.nguyen wrote:

> I also tried downloading the JDK version of Java and received this new error
> when running it:
> 
> Error : .onLoad failed in loadNamespace() for 'rJava', details:
>  call: dirname(this$RuntimeLib)
>  error: a character vector argument expected
> Error: package/namespace load failed for ‘rJava’
> 
> --
> View this message in context: 
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> Sent from the R help mailing list archive at Nabble.com.
> 
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