[R] drop elements of vector by class

[E. Michael Foster]

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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E. Michael Foster
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