Keywords: attribute
### ** Examples x <- matrix(1:12, 3, 4) comment(x) <- c("This is my very important data from experiment #0234", "Jun 5, 1998") x
[,1] [,2] [,3] [,4] [1,] 1 4 7 10 [2,] 2 5 8 11 [3,] 3 6 9 12
comment(x)
[1] "This is my very important data from experiment #0234" [2] "Jun 5, 1998"