How to calculate mean value of two list for each row

Question

I have two lists as below:

l1 <- list(a=1, b=2, c=3)
l2 <- list(a=4, b=5, c=6)

I want to calculate the mean value of the two lists for each row and assign the result to a new list. Like below:

l3 <- mean(l1, l2)

How can I achieve this in R?

Answer 1

Using:

colMeans(do.call(rbind.data.frame, list(l1,l2)))

gives:

  a   b   c 
2.5 3.5 4.5