Sum a list of matrices [duplicate]

Answer 1

You could you do.call with some monkeying around but it loses its eloquence:

.list <- list(matrix(1:25, ncol=5), matrix(1:25,ncol=5), matrix(1:25,ncol=5))

x <- .list[[1]]
lapply(seq_along(.list)[-1], function(i){
    x <<- do.call("+", list(x, .list[[i]]))
})
x