[R] frequency table across multiple variables

[Ralikwen]

Dear R users,

I have a dataframe like this:

x1<-c(1,2,3,4,NA ,NA ,NA, 3, 1, 1, 1, 1, 2, 2, 3, 4, 4)
x2<-c(2,3,4,3,4,3,4,2,2,3,4,NA,NA,NA,NA,4,3)
x3<-c(1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,1,2)
m<-data.frame(x1,x2,x3)

I would like to create a frequency table like this:

      x1  x2  x3
NA
1
2
3
4

where the values in each cell would be the count of the value for that
variable.
How can I do this?

Thanks for the help.
Balázs

 
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