All, I am using sample() to take bootstrap replicates and want to be able to take replicates from multiple columns in a data.frame. I have done this by using set.seed() to set the seed to the replicate number: for(i in i:10) { set.seed(i) x <- sample(... set.seed(i) y <- sample(... } prior to the call to sample(). Is there a better way of doing this? Any way of getting rid of the for() loop? Mark -- Mark Myatt -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._