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...2596 135 3 4 52.41335 0.699786 3.805122 136 3 5 54.116723 1.1927297 5.508495 137 3 6 52.618161 1.1686288 4.009933 138 3 7 49.822764 1.6303473 1.214536 139 3 8 47.107336 1.2013356 -1.500892 140 3 9 47.104214 1.1986148 -1.504014 132 3 10 48.719484 0.6765047 0.111256 Thank you so much for your help. Kristiina -- View this message in context: http://r.789695.n4.nabble.com/How-to-adjust-the-start-of-a-series-to-zero-i-e-subtract-the-first-value-from-the-sequence-tp4634999.html Sent from the R help mailing list archive at Nabble.com.

...,pch=as.numeric(school), col=as.numeric(density), > xlim=c(6,13), ylim=c(0.7,1.6)) > points(age2, body_length2, pch=as.numeric(school), > col=as.numeric(density)) http://n4.nabble.com/forum/FileDownload.jtp?type=n&id=2023096&name=Screen_shot_2010-04-22_at_11.03.08_PM.png thanks! kristiina -- View this message in context: http://r.789695.n4.nabble.com/help-with-plotting-lines-linking-two-sets-of-points-tp2023096p2023096.html Sent from the R help mailing list archive at Nabble.com.

....533 22.833 23.618 here is my code so far... > random <-for(i in unique(file)){h[sample(1:24,1),]} > random but this only gives me one sample... and if I try to exclude naming it as random, then nothing comes up. i'm confused and very new to R. please help! many many thanks! kristiina -- View this message in context: http://r.789695.n4.nabble.com/sampling-one-random-frame-from-each-unique-trial-tp2270396p2270396.html Sent from the R help mailing list archive at Nabble.com.