On 12/19/07, Spilak,Jacqueline [Edm] <[EMAIL PROTECTED]> wrote: > Hi all > I can't find what I am looking for so I am asking here. I have a > dataset that looks something like this. > > Year season percent_below > 2000 Winter 6.9179870 > 2000 Spring 1.6829436 > 2000 Summer 1.8463501 > 2000 Autumn 3.8184993 > 2001 Winter 2.8832806 > 2001 Spring 2.5870511 > 2001 Summer 0.0000000 > 2001 Autumn 4.7248240 > 2002 Winter 4.4532238 > 2002 Spring 3.7468846 > 2002 Summer 1.0784311 > 2002 Autumn 3.7061533 > > I have plotted this nicely using > barchart(percent_below ~ factor(Season, levels=Season), data= dataset1, > group=Year) > This gives me a barplot by season with each year shown in that season. > Now the tricky part. My data is from 2000 to 2007 and 2007 is an > important year. I have an upper and lower limit for percent_below for > 2007 for each season. I would like to add the upper and lower limit of > 2007 as a black line to each season. The upper and lower limit will be > different for each season. This is being done so for a comparison so I > need it done this way.
I would suggest a slightly different format. Here's an example with one set of limits; you can add another set similarly. If you really want a single panel, you could use panel.segments(). barchart(percent_below ~ factor(Year) | factor(season, levels=unique(season)), data= dataset1, origin = 0, layout = c(4, 1), upper_2007 = c(6, 4, 5, 3), panel = function(..., upper_2007) { panel.abline(h = upper_2007[packet.number()]) panel.barchart(...) }) -Deepayan ______________________________________________ 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.