create a matrix containing average of multiple matrices in R [duplicate]

Answer 1

One option using reduce can be as:

library(purr)
ll <- list(A,B,C)
reduce(ll,`+`) / length(ll)

#          [,1]     [,2] [,3]
# [1,] 3.333333 3.333333    3
# [2,] 1.000000 7.000000    7