[R] Barchart to make a graph like this??

[knussear@biodiversity.unr.edu]

Hi list,

I'm trying to get R to make a graph like the one shown in this pdf, where
males are white bars and females are black bars.

http://www.brrc.unr.edu/~knussear/mmgraph.pdf

I tried barchart, but I couldnt get the bars to share a common x axis.

Do you have any suggestions?

Thanks for your help

Ken