[R] Help : delete at random

[Duncan Murdoch]

On Tue, 01 Mar 2005 15:04:17 +0100, Caroline TRUNTZER
<caroline.truntzer at chu-lyon.fr> wrote :

>Hello
>I would like to delete some values at random in a data frame. Does
>anyone know how I could do?

Assuming your data.frame is named df:

To delete index i, use df[-i, ] (i.e. the row selection is the
negative of the index you don't want).

This works for vectors i, so df[-sample(1:N, n), ]  would delete
a random selection of n rows from N.

Duncan Murdoch