Here's one way: # Here I read in your data to a variable 'x' x = read.delim(textConnection( "Bin Depth Fish 1 4 2 1 8 24 1 12 4 2 4 3 2 8 21 2 12 2 3 4 12 3 8 2 3 12 33"), sep = " ", header = TRUE)
do.call(rbind, lapply(split(x, x$Bin), function(grp) grp[which.max(grp$Fish),])) -- View this message in context: http://r.789695.n4.nabble.com/Sorting-Dataframes-tp3580075p3581189.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
