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Mostly from Perl as it happens, but ... Why are graphing packages that plot mulitple lines obsessed with all the Y data sets having a common X data set. I need to plot chronological age against reading age, which is easy enough, I have data like: 6y 3m (6.25) , 6y 6m, (6.5) 7y 6m (7.5) , 8y 0m, (8) all nicely paired, but not necessarily whole numbers. Nice easy line plot. I also want an equivalency line (y=x), but I don't want to plot (6.25,6.25) and (7.5,7.5) I want to plot (6,6),(7,7),(8,8). But no, I have only one X data set! It seems that most graphers want the data to be of the form: @x,@y1,@y2,@y3,... How annoying is that! Steve -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/linux_adm/list-faq.html