http://r.789695.n4.nabble.com/file/n4636585/Baumdaten_aufbereitet.csv Baumdaten_aufbereitet.csv Here you have an overview about my data frame... -- View this message in context: http://r.789695.n4.nabble.com/computing-a-subset-using-a-loop-tp4636564p4636585.html Sent from the R help mailing list archive at Nabble.com.