Re: [R] Which variable exist after random

From: TEMPL Matthias <Matthias.Templ_at_statistik.gv.at>
Date: Thu 02 Jun 2005 - 01:14:33 EST


> Dear R-helper,
> How could I count only some variable was exist after running sample
> (random) function.

?

> For example,
>
> > testx <- factor(c("Game","Paper","Internet","Time","Money"))
> > for(i in 1:2) {
> + x <- sample(testx,replace=TRUE)
> + print(x)
> + }
> [1] Money Money Time Internet Time
> Levels: Game Internet Money Paper Time
> [1] Time Money Game Money Money
> Levels: Game Internet Money Paper Time
> >
>
> The result above Game, Internet, Money, and Time only exist
> and "Paper" was missing. Best, Sofyan
>

sample(testx, replace=FALSE)

Is that what you want??

Best,
Matthias



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