10x i solved it ... mein problem was that i had 2 column by them i have to group, i just "pasted" the values together so that at the end i have one column to group and then was easy ... here is the script that i used: http://tolstoy.newcastle.edu.au/R/help/06/07/30184.html Ivan thanks for the help too :) -- View this message in context: http://r.789695.n4.nabble.com/group-by-in-data-frame-tp3324240p3324469.html Sent from the R help mailing list archive at Nabble.com.
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