say n = 100 I want to partition this into 4 random groups wheren n1 + n2 + n3 + n4 = n and ni is the number of elements in group i. Thank you for you help -- View this message in context: http://r.789695.n4.nabble.com/breaking-up-n-object-into-random-groups-tp4147476p4147476.html Sent from the R help mailing list archive at Nabble.com.