[R] How to get a proportion of a Vector Member

[Gundala Viswanath]

I have a vector that looks like this:

> foo
[1] "o" "o" "o" "x" "o" "o" "o" "o" "o" "x" "x" "o" "x

How can we find the percentage of "o" and "x" in
that vector in R?

- G.V