hello, i have to do a sna for a seminar. i have a csv.data with acteurs. i can identify a cooperation between acteurs with an ID in the csc.data. Is the ID equal with another acteur, so they have an cooperation. furthermore i have an information about the acteurs in the csv.data. there are three types of acteurs in this network: an economy-acteur, univeristy-acteur and techincal college-acteur. Now i want to know, the percentage or the absolute number of the type of cooperation between: university to economy university to technical college university to university and economy to technical college in other words: which type of acteur cooperates with which type of acteur. Can anybody help me? Iam a beginner with this programm and i need a step by step entry / explanation for the correct r-codes. Thanks! -- View this message in context: http://r.789695.n4.nabble.com/combine-attributes-tp4670440.html Sent from the R help mailing list archive at Nabble.com.