hello together, i want to eliminate double entries in a data.frame. I have a data.frame, like this one: 1 2 A Albert 1800 B Albert 1800 C Jack 2000 D Mike 2200 As you can see, "Albert" is two times available. I want a solution like this one: 1 2 A Albert 1800 B Jack 2000 C Mike 2200 How can i eliminate this double entries? Thanks. Mat? -- View this message in context: http://r.789695.n4.nabble.com/eliminate-double-entries-in-data-frame-tp4655956.html Sent from the R help mailing list archive at Nabble.com.