2.10) Visualizing R Objects (cont'd)

A matrix (in this case without row and column names):
     [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8]
[1,]    9   11   10    9   10    8   10    9
[2,]   10   11   12   10   10    8    9   10
[3,]   11   12   12    9    9   11   10   10

A data frame (a special kind of list where all elements have the same length):
  Site Girth Fruits
1    A  12.6     25
2    B   9.8     20
3    C   9.6     19
4    D  10.3     23

The beginning of an R function (the whole thing can be very long!):
function (x, y=NULL, use="everything", method=c("pearson","kendall","spearman"))
{
    na.method <- pmatch(use, c("all.obs", "complete.obs", "pairwise.complete.obs","everything","na.or.complete"))

Over to you...
What does an array look like on the screen?