RE: [R] Which variable exist after random

From: Liaw, Andy <andy_liaw_at_merck.com>
Date: Thu 02 Jun 2005 - 01:46:24 EST


Or perhaps

> f <- factor(letters[1:2], levels=letters[1:3])
> f

[1] a b
Levels: a b c
> levels(f[, drop=TRUE])

[1] "a" "b"

Andy

> From: TEMPL Matthias
>
> > Dear R-helper,
> > How could I count only some variable was exist after running sample
> > (random) function.
>
> Or is this what you want?
>
> Tab <- table(sample(testx, replace=TRUE))
> Tab[ Tab > 0 ]
>
> > 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
> >
> > ______________________________________________
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> >
>
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>



R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Thu Jun 02 02:00:04 2005

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