On Fri, Dec 18, 2009 at 2:39 PM, William Dunlap <wdun...@tibco.com> wrote:
> > colchoose( data.frame(a=1:4,b=11:14), c('a','b','b','a'))
> > => c(1,11,11,1)
>
> I thought you would want c(1,12,13,4), not c(1,11,11,1),
> out of this call. Perhaps I misunderstand your requirements.
>
Sorry, you're right. I edited my test case and didn't change the results --
my apologies!
> However, if you want c(1,12,13,4) one approach is to use
> a 2-column matrix of integers as the subscript into the
> main matrix (or data.frame).
Thanks! That makes sense. This looks like a good way of doing things.
-s
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