[R] list of variables to table of factors

[arademaker]

Sorry about the simple question. Is there any function to transform a
data.frame like this (rows are observations and columns are
variables):

  Q1_1 Q1_2 Q1_3 Q1_4 Q1_5 Q1_6 Q1_7 Q1_8
1    5    5    5    4    5    4    5    4
2    4    5    3    5    5    5    3    5
3    4    4    3    4    4    4    4    2
4    5    5    5    5    5    4    4    4
5    5    5    5    5    5    5    5    5
6    3    4    4    3    3    3    4    0
7    4    3    4    4    0    4    5    0
8    2    2    3    1    2    1    1    1

Into a data.frame where the rows are the columns of the previous one
and each column is a possible value for that variable. The data are
the counting of observations for each variable vs possible value:

          1   2  3  4  5
Q1_1  0   1  1  3  3
Q1_2  0   1  1  2  4
...

I know that I can use:

tapply(x[["Q1_1"]],factor(x[["Q1_1"]], levels=1:5), length)

to compute each row and than create a matrix of it. But I wonder if
there is some function already defined for doing this transformation.

Cheers,
Alexandre