How do I combine lists of identical lengths into one?

Question

Assuming I have two lists: ``` xx <- as.list(1:3) yy <- as.list(LETTERS[1:3]) ``` How do I combine the two such that each element of the new list is a list of the corresponding elements of each component list. So if I combined the two above, I should get: ``` > combined_list [[1]] [[1]][[1]] [1] 1 [[1]][[2]] [1] "a" [[2]] [[2]][[1]] [1] 2 [[2]][[2]] [1] "b" [[3]] [[3]][[1]] [1] 3 [[3]][[2]] [1] "c" ``` If you can suggest a solution, I'd like to scale this to 3 or more.

Accepted Answer

This should do the trick. Nicely, `mapply()` will take an arbitrary number of lists as arguments.

```
xx <- as.list(1:3)
yy <- as.list(LETTERS[1:3])
zz <- rnorm(3)

mapply(list, xx, yy, zz, SIMPLIFY=FALSE)
```

How do I combine lists of identical lengths into one?

Solution

Problem