[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!