On Fri, 7 Dec 2001, Duncan Murdoch wrote:
> I'd like to sort the rows of a matrix, sorting by the values in the
> 1st column, breaking ties by the 2nd, etc. I don't know in advance
> how many columns there'll be.
>
> Is there a way to force the unknown number of columns of my matrix to
> be the ... arguments of order(), or is there another way to do this
> (other than a loop)?
You should be able to do this with do.call(), which takes a function name
and a list of arguments. Something like
do.call("order",lapply(1:NCOL(m) function(i) m[,i]))
-thomas
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