Hello,
On May 31, 2008, at 4:10 PM, ss wrote:
Hi list,
I have a question on how to identify the overlapped items from two
vectors:
x<-c(0,1,2)
y<-c(1,2,2,3)
You can use the %in% operator to return a logical vector that
indicates the overlap.
> x<-c(0,1,2)
> y<-c(1,2,2,3)
> y %in% x
[1] TRUE TRUE TRUE FALSE
and plot the number of the overlapped as well as non-overlapped in a
diagram?
I am not sure what you mean by plotting the number of overlaps. Do
you mean show the overlaps with a special symbol? Or do you want to
just show the number?
If it is the former, perhaps the following would do?
> plot(x,rep(1,length(x)), xlim = c(0,5))
> points(y, rep(1,length(y)), pch = "+")
> iy = which(y %in% x)
> points(y[iy], rep(1,length(iy)), pch = "+", col = "red")
Cheers,
Ben
Ben
Thanks much,
Allen
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