Jim, I really appreciate your hlep. You almost solve my problem, I had tried both of your suggestions, but both of them only solve part of problem, and how can I combine their functions? your second sample can't give the axis (like 0-20, 20-50 etc), btw, we don't have "plotrix" function on our machine. What I want looks like the second plot from http://www.statmethods.net/graphs/boxplot.html, I want to compare the MB between the two dataset, so the first/third/fifth box should from file1(MB) with same color (black), second/fourth/sixth box from file2(MB) with same color(red). Of course, the first (black) box and second(red) box share the same data range (eg 0-20), and so on for other group of box.
Thank you a bunch for help. -- View this message in context: http://n4.nabble.com/help-needed-with-boxplot-tp1677678p1687165.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.
