I'm just a ggplot2 beginner, but... It seems to me that you're mixing continuous and factor variables/concepts. It looks to me as if ForkLength and Number are continuous values. But you'll need to convert ForkLength into a factor before using geom="bar". I do that and the graph "works" but the bars are extremely busy, which I assume is what you mean by "crowded".
As I try several different things, I'm seeing error messages. Are you not seeing error messages? Is the bottom line that you simply want to display some continuous data in a histogram-ish style, and you don't like the default "binning" of Number for each of many ForkLengths? If you simply use geom="line", things look clear and simple, no need to bin or simplify or... If you do end up using geom="bar", I believe the mistake you're making -- and I see an error message when I try -- is that you are using scale_x_continuous whereas the X axis is discrete, so you should be using scale_x_discrete. But then it will take some R magic to combine your "bins" into wider bins so you get a "less crowded" look. Or perhaps I'm misunderstanding? Wayne Felipe Carrillo wrote: > > Hi: I need some help. > I am ploting a bar graph but I can't adjust my x axis scale > I use this code: > i <- qplot(ForkLength,Number,data=FL,geom="bar") > i + geom_bar(colour="blue",fill="grey65") # too crowded > > FL_dat <- ggplot(FL,aes(x=ForkLength,y=Number)) + > geom_bar(colour="green",fill="grey65") > FL_dat + scale_x_continuous(limits=c(20,170)) # Can't see anything > > FL Number > 29 22.9 > 30 63.4 > 31 199.3 > 32 629.6 > 33 2250.1 > ... > -- View this message in context: http://www.nabble.com/ggplot2-Xlim-tp21161660p21170453.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.
