Convert a contingency table into dataframe

Question

How to convert a contingency table into dataframe?

Answer 1

The simplest way to convert the contingency table to a data frame is using as.data.frame(). 

Ex:

> el = c(1,6,2,6,2)
> el
[1] 1 6 2 6 2

> table(el)
el
1 2 6 
1 2 2 

> as.data.frame(table(el))
  el Freq
1  1    1
2  2    2
3  6    2