[R] frequency

[gfaieta@katamail.com]

I'm quite new with R so sorry if I asked something very easy or complicated.
I have a data frame with (for instance) 4 variables (4 columns) and 100 records. I would like to have a 'summary' table for each variable that shows me the following:

variable 1      Freq.    %     % cumulative

class 1           10        10%      10%
class 2           20        20%      30%
class 3           70        70%     100%

Is there any kind of function in R that does somthing like this? Or is it necessary to create a customized function?
Thank you in advanced.

Giuseppe Faieta -statistician-
Bologna (Italy)

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