[R] 2 barplots in the same graph

[Gabor Grothendieck]

The barplot solution already presented is probably what you want
but just in case here is a zoo solution:

library(zoo)
z <- merge(zoo(x2), zoo(x1, seq(x1)+.5))
plot(z, type = "h", plot.type = "single", col = 1:2, lwd = 5)

Or a similar solution without zoo:
 plot(c(x1, x2) ~ c(seq(x1)+.5, seq(x2)),
  col = c(1+0*x1, 2+0*x2), type = "h", lwd = 5)


On 2/22/06, jia ding <dingjia at gmail.com> wrote:
> Hello,
>
> I have a very simple question about "2 barplots in the same graph".
>
> It seems quite easy, but I searched google for long time, haven't find
> solution.
>
> For example, I want one graph like:
> x1=seq(0,2,by=0.3)
> x2=seq(3,0,by=-0.1)
> barplot(x1,col="red")
> barplot(x2,col="green")
>
> It means if it's on the same graph, some bars are overlaped.
> So if the bars are hollow, instead of filled with color, it will be better.
>
> Actually, I think it's something similar with matlab's "hold on" command.
>
> Thanks!
>
> Nina
>
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