You may find it easier to use a frequency polygon, geom = "freqpoly".
Hadley
On Tue, Nov 30, 2010 at 2:36 PM, Small Sandy (NHS Greater Glasgow &
Clyde) <sandy.sm...@nhs.net> wrote:
> Hi
>
> With ggplot2 I can very easily create beautiful histograms but I would like
> to put two histograms on the same plot. The histograms may be over-lapping.
> When they are overlapping the bars are shown on top of each other (so that
> the overall height is the sum of the two). Is there any way to get them to
> display overlapping (with smaller value in front, larger value behind) so
> that the overall height is equal to the height of the largest value
>
> The following demonstrates the problem (there is probably a simple way to
> generate the sequence in d1 but I don't know it and just threw this together
> quickly)
> d1<-c(1,2,2,3,3,3,4,4,4,4,5,5,5,5,5,6,6,6,6,7,7,7,8,8,9,6,7,7,8,8,8,9,9,9,9,10,10,10,10,10,11,11,11,11,12,12,12,13,13,14,15,15,16,16,16,17,17,17,17,18,18,18,18,18)
>
> d2<-c(rep("a",25), rep("b",39))
> dafr<-data.frame(d1,d2)
>
> library(ggplot)
> qplot(d1, data=dafr, fill=d2, geom='histogram', binwidth = 1)
>
> Many thanks for any help
> Sandy
>
> Sandy Small
> Clinical Physicist
> NHS Forth Valley
> and
> NHS Greater Glasgow and Clyde
>
>
> ********************************************************************************************************************
>
> This message may contain confidential information. If yo...{{dropped:24}}
>
> ______________________________________________
> 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.
>
--
Assistant Professor / Dobelman Family Junior Chair
Department of Statistics / Rice University
http://had.co.nz/
______________________________________________
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.
