[R] list assignment syntax?

Peter Ehlers ehlers at ucalgary.ca
Sat Mar 31 01:49:56 CEST 2012

On 2012-03-30 15:40, ivo welch wrote:
> Dear R wizards:  is there a clean way to assign to elements in a list?
>   what I would like to do, in pseudo R+perl notation is
>   f<- function(a,b) list(a+b,a-b)
>   (c,d)<- f(1,2)
> and have c be assigned 1+2 and d be assigned 1-2.  right now, I use the clunky
>    x<- f(1,2)
>    c<- x[[1]]
>    d<- x[[2]]
>    rm(x)
> which seems awful.  is there a nicer syntax?
> regards, /iaw
> ----
> Ivo Welch (ivo.welch at brown.edu, ivo.welch at gmail.com)

I must be missing something. Why not just assign to a
vector instead of a list?

   f<- function(a,b) c(a+b,a-b)

If it's imperative that f return a list, then you
could use

   (c, d) <- unlist(f(a, b))

to get vector (c, d).

Peter Ehlers

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