Thanks to all who responded, particularly to Michael. Your solution was the easiest to understand & to implement. This worked beautifully:
cmtot <- arrange(cmtot, -PCTTOT)#sort by descending top <- with(cmtot,which.max(cumsum(PCTTOT) >= 50)) topcm <- cmtot[seq(1,top),] -- View this message in context: http://r.789695.n4.nabble.com/Conditional-operations-in-R-tp4643497p4643540.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.
