Message-ID: <971536df0812111203g4b189572x401b0ad3671c0b27@mail.gmail.com>
Date: 2008-12-11T20:03:23Z
From: Gabor Grothendieck
Subject: is there a way to recursilvely lapply
In-Reply-To: <8ec76080812111159n6c05869em861a8d111cee2372@mail.gmail.com>
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
<armstrong.whit at gmail.com> wrote:
> 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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