On 07/09/2010 11:29 PM, Mao Jianfeng wrote:
Dear R-help listers,
I am new. I just want to get helps on how to plot two histograms
overlapped in the same plane coordinate. What I did is very ugly.
Could you please help me to improve it? I want to got a plot with semi-
transparent overlapping region. And, I want to know how to specify the
filled colors of the different histograms.
I also prefer other solutions other than ggplot2.
Many thanks to you.
What I have done:
library(ggplot2)
age<-c(rnorm(100, 1.5, 1), rnorm(100, 5, 1))
sex<-c(rep("F",100), rep("M", 100))
mydata<-cbind(age, sex)
mydata<-as.data.frame(mydata)
head(mydata)
qplot(age, data=mydata, geom="histogram", fill=sex, xlab="age",
ylab="count", alpha=I(0.5))
Hi Mao,
Have a look at the last example on the help page of the "barp" function
in plotrix. This shows how to plot a multiple histogram similar to what
you have done.
Jim
______________________________________________
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.
