[R] apply on two lists?

David Winsemius dwinsemius at comcast.net
Tue Dec 1 06:22:45 CET 2009

On Nov 30, 2009, at 11:07 PM, Peng Yu wrote:

> x=list(a=c(1,2),b=c(3,4,5))
> y=list(a=c(1,2),b=c(3,4,5))
> lapply(seq(along=x),function(i){cbind(x[[i]],y[[i]])})

mapply("cbind", x, y)

> I need to apply some function on two lists. I have to use the index to
> do as shown above. But I feel more natural to refer to the lists
> without using the index (using the syntax of something like,
> lapply(x,y, function(i,j){....})). I'm wondering if there is such a
> thing in R? Or there are some other ways better than the example at
> the very beginning?
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David Winsemius, MD
Heritage Laboratories
West Hartford, CT

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