Hi, I have a graph G with n nodes (n=1..100). I want to find the spanning tree over only some specific nodes (not all nodes in G), for instance nodes (2,3,6). Is there any way in R that can do this? Maybe one solution is create another subgraph g' of graph G which consists nodes 2,3,6 and their edges. Then running minimum.spanning.tree(g'). I want to know is there any better solution? Regards, Amir -- _______________________________________________________ Amir Darehshoorzadeh | Comp. Architecture Dept. PhD Student | UPC-Campus Nord, C6-221 Email: amir at ac.upc.edu | c/ Jordi Girona, 1-3 Tel: | 08034 Barcelona - SPAIN http://personals.ac.upc.edu/amir