[R] drop elements of vector by class

From: E. Michael Foster <foster_at_pop.psu.edu>
Date: Sat 18 Jun 2005 - 00:57:35 EST

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

michael foster

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