[R] simple question on picking out some rows of a matrix/data frame
Hadley Wickham
h.wickham at auckland.ac.nz
Tue Feb 10 00:26:35 CET 2004
Have you looked at subset?
eg subset(dataframe, x != y, select = c(x, y))
Hadley
Roger Levy wrote:
> Hi,
>
> 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.
>
> How can I do that?
>
> Many thanks,
>
> Roger Levy
>
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