[R] simple question on picking out some rows of a matrix/data frame
tlumley at u.washington.edu
Mon Feb 9 22:25:55 CET 2004
On Mon, 9 Feb 2004, Roger Levy wrote:
> I have a simple question about matrix/data frame manipulation. I have
> a data frame that looks a something like this
> X Y Z
> 1 0 "apples"
> -1 -1 "oranges"
> 0 -1 "bananas"
> and I'd like to pull out all the rows for which X and Y are (un)equal
> into a submatrix.
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