cbind two lists of data.frames to a new list [duplicate]

Question

I have two lists of data.frames. Both lists have the same length and contain fitting data.frames in their according list elements. So the scenario looks like this

dfa = data.frame(a=1:3, b = letters[1:3])
dfb = data.frame(x=runif(3))
a = replicate(3, dfa, simplify = FALSE)
b = replicate(3, dfb, simplify = FALSE)

One obvious solution is:

lapply(seq_along(a), function(i) cbind(a[[i]], b[[i]]))

But I was wondering if their might be a better solution.

Diverge

Answer 1

You can use Map

Map(cbind, a, b)

Existential

Answer 2

You can use mapply :

mapply(cbind, a, b, SIMPLIFY=F)

Randallrandan

Map is kind of a wrapper for mapply(FUN = f, ..., SIMPLIFY = FALSE) Check the Map – Existential