Re: [R] drop elements of vector by class

From: Dimitris Rizopoulos <dimitris.rizopoulos_at_med.kuleuven.be>
Date: Sat 18 Jun 2005 - 01:26:09 EST

try this

# to get only the factors
macro.f <- macro[sapply(macro, is.factor)]

to drop the factors
macro.nf <- macro[sapply(macro, !is.factor)]

# to get only numerics
macro.n <- macro[sapply(macro, is.numeric)]

and so on.

I hope it helps.

Best,
Dimitris



Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven

Address: Kapucijnenvoer 35, Leuven, Belgium

Tel: +32/16/336899
Fax: +32/16/337015
Web: http://www.med.kuleuven.be/biostat/
     http://www.student.kuleuven.ac.be/~m0390867/dimitris.htm



> i'm trying to build a little summary table for the contents of a
> data frame.
>
> t<-sapply(macro, data.class)
> c<-sapply(macro, length)
> m<-sapply(macro, mean, na.rm=T, digits=2)
> cbind(type=t, n=c , mean=m)
>
> I want to drop the variables that are factors so I can include -max-
> and
> -min- in my table.
> -macro- contacts the data--how do I drop the variables according to
> their
> data.class
>
> thanks,
> michael foster
>
>
>
>
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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 Sat Jun 18 02:30:28 2005

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