It seems to produce some strange values: > xx=1:10 > which(xx==quantile(x,0.2,type=3)) [1] 5 > which(xx==quantile(x,0.5,type=3)) integer(0) -- View this message in context: http://r.789695.n4.nabble.com/Percentile-rank-for-each-element-in-list-tp2529523p2530060.html Sent from the R help mailing list archive at Nabble.com.