ggplot2 Xlim
Wayne: What's crowded are my x axis labels. The bars look fine on my graph but the labels are being displayed from 29 to 170 one by one. I need something like a seq(29,170 by:10) or something like that. I don't want to treat my FL as factor because I don't want a bar per each FL value, I only want to count the number of FL at any given FL size. Thanks
--- On Thu, 12/25/08, Wayne F <wdf61 at mac.com> wrote:
From: Wayne F <wdf61 at mac.com> Subject: Re: [R] ggplot2 Xlim To: r-help at r-project.org Date: Thursday, December 25, 2008, 2:43 PM 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 ...
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