[R] contingency table, several variables from dataframe

[Birgitle]

Hello R-Users!

I need a little help to build up a contingency table out of several
variables.

  A<-c("F","M","M","F","F","F","F","M","F","M","F","F")
  B<-c(0,0,0,0,0,0,1,1,1,1,0,1)
  C<-c(0,1,1,1,1,1,1,1,1,0,0,0)

  ABC<-as.data.frame(cbind(A,B,C))

  ABC

   A B C
1  F 0 0
2  M 0 1
3  M 0 1
4  F 0 1
5  F 0 1
6  F 0 1
7  F 1 1
8  M 1 1
9  F 1 1
10 M 1 0
11 F 0 0
12 F 1 0

I would like to count in each variable B and C the frequencies for M and F
(variable A) and finally get the following table:

     B   C
F   3   5

M  2   3

Is there a function that can do that in one step?
Tried ?structable, ?ftable, ?xtabs, ?table but could not get what I would
like to have.

Maybe I did not use the tried functions in the right way.

Many thanks in advance for any help.

B.



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