Hi Bobby,
Bobby Prill <rprill at jhu.edu> writes:
> R Version 2.2.1 (2005-12-20 r36812)
You need to upgrade to a more recent version of R (yours is quite old
in R-years). Once you have upgraded to R-2.4.1, you should be able to
install Rgraphviz:
source("http://bioconductor.org/biocLite.R")
biocLite("Rgraphviz")
+ seth