graph data mining

Hi,

Hi

I am wondering if R or some others provide free-to-use graph mining  
tools,
like mining some frequent structure in a x-y plot data?

It sounds like you're looking for a library does frequent subgraph  
mining across a graph dataset. I'm not sure what you mean by x-y plot  
data, but if you can convert that into a graph, then look here:

http://www.borgelt.net/moss.html

It also has an implementation of the (famous) gSpan algorithm for  
closed graph patterns (CloseGraph) in it as well.

It's not an R library though ... it's written in Java.

HTH,
-steve

--
Steve Lianoglou
Graduate Student: Computational Systems Biology
   |  Memorial Sloan-Kettering Cancer Center
   |  Weill Medical College of Cornell University
Contact Info: http://cbio.mskcc.org/~lianos/contact