There are several. Have a look at the gR Task Views. There you will also find a link to the statnet suite, where you will find links to a dedicated set of jstatsoft articles.
Regards, Mark.
Rory Winston wrote:
Hi all
On page 39 of this paper [1] by Andrew Lo there is a very interesting
correlation network diagram (sorry I dont have a more convenient link to
the type of diagram I'm talking about). does anyone know of any package in
R that can generate these types of diagrams?