Hi, Is there any function in R to find the Directed Minimum Spanning tree? There are some for undirected but I am looking for a directed tree. 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