Get names of list in for loop
Here is a simpler way to do this:
for (name in names(myList)) {
print(name)
print(myList[[name]])
}
Note: I did not write this code. I copied it from this page.
Using some dummy data and a silly contrived example
ll <- list(A = 1:10, B = LETTERS[1:10], C = letters[1:10])
You can lapply()
over the indices of the elements of ll
:
out <- lapply(seq_along(ll),
function(ind, list, names) {
paste(names[ind], "=", paste(list[[ind]], collapse = ", "))
}, list = ll, names = names(ll))
R> out
[[1]]
[1] "A = 1, 2, 3, 4, 5, 6, 7, 8, 9, 10"
[[2]]
[1] "B = A, B, C, D, E, F, G, H, I, J"
[[3]]
[1] "C = a, b, c, d, e, f, g, h, i, j"
or for()
loop over the list:
ll2 <- vector("list", length(ll))
nams <- names(ll)
for(i in seq_along(ll)) {
ll2[[i]] <- paste(nams[i], "=", paste(ll[[i]], collapse = ", "))
}
ll2
R> ll2
[[1]]
[1] "A = 1, 2, 3, 4, 5, 6, 7, 8, 9, 10"
[[2]]
[1] "B = A, B, C, D, E, F, G, H, I, J"
[[3]]
[1] "C = a, b, c, d, e, f, g, h, i, j"