[R] when to use `which'?

[csrabak]

Em 12/7/2011 17:29, David Winsemius escreveu:
>
[snipped]

> If you have millions of records and tens of thousands of NA's (say ~ 1%
> of the data), imagine what your console looks like if you try to pick
> out records from one day and get 10,000 where you were expecting 100. A
> real PITA when you are doing real work.
>

I canvas this snippet of experience and wisdom to become a fortune :-)

--
Cesar Rabak