is there a way to recursilvely lapply

This will recursively lapply and may or may not be
what you are looking for:

rapply(x, sum)

On Thu, Dec 11, 2008 at 2:59 PM, Whit Armstrong
for a simple example:

x <- list()
x[["a"]] <- list(a=c(1,2,3),b=c(3,4,5))
x[["b"]] <- list(a=c(6,7,8),b=c(9,10,11))

lapply(x,sum)

this fails w/
Error in FUN(X[[1L]], ...) : invalid 'type' (list) of argument

Just wondering if I have overlooked something obvious.

one can also do:

lapply(x,lapply,sum)

but that assumes that you already know how many levels you have, and
that all the levels are consistent.

-Whit

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is there a way to recursilvely lapply

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