[R] ggplot2 Xlim

[Felipe Carrillo]

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
> > ...
> > 
> 
> -- 
> 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 at 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.