In response to my question Andy Liaw wrote:
> Here's one way:
<snip>
> > dat$rank <- with(dat, ave(x, f, FUN=rank))
<snip>
> Don't know how this rates on the slick-quick-sexy scale...
Thanks Andy. That's definitely a 10 on the slick-quick-sexy scale.
I (blush!) didn't know about ``ave()''.
cheers,
Rolf
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