[R] using "table" in R

[Bingshan Li]

Hi there,

I have a dataframe whose elements are numbers or
characters. I want to extract the frequencies of each
elements in the dataframe. For example,

d = as.data.frame(matrix(c(1, 2, 3, 3), 2,2))

What I want is first what are the elements in the data
(1,2,3 here) and second what are their frequencies
(1,1,2 respectively). How to use "table" to extract
these two pieces of information? I played with "table"
but couldn't extract the information. Please assume
that we do not know how many elements in the dataframe
a priori.

Thanks a lot!