array of lists in r

Question

Suppose if I want to have 10 element array each element is a list/map. I am doing this:

x = array(list(), 10)
x[1][[ \"a\" ]] = 1
Warning message:
In x[1][[\         


        

Answer 1

What you're calling an "array" is usually just called a list in R. You're getting tripped up by the difference between [ and [[ for lists. See the section "Recursive (list-like) objects" in help("[").

x[[1]][["a"]] <- 1

UPDATE:
Note that the solution above creates a list of named vectors. In other words, something like

x[[1]][["a"]] <- 1
x[[1]][["b"]] <- 1:2

won't work because you can't assign multiple values to one element of a vector. If you want to be able to assign a vector to a name, you can use a list of lists.

x[[1]] <- as.list(x[[1]])
x[[1]][["b"]] <- 1:2