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Dear Gergely, try library("graph") ? ftM2graphNEL Best wishes Wolfgang ------------------------------------------------------------------ Wolfgang Huber EBI/EMBL Cambridge UK http://www.ebi.ac.uk/huber Gergely Zahoranszky wrote: > Hi, > > I am quite a newbie in R specially using R graph package. I looked over lot of references relating this package but I could not figure out how to create a graph from an edge list file which is a simple text file. I am interested in undirected graphs. Could anyone please give me a simple example how to do it? Let's say I have a text file like this: > > node1 node2 > node1 node4 > node2 node3 > node3 node4 > > > I would like to use this graph to calculate the cluster coefficient and average edgenumber. > > Thanks! > > > Zahoo > > >