[R] Information Frequency problem calculation

jarod_v6 at libero.it jarod_v6 at libero.it
Mon Oct 7 18:09:49 CEST 2013

Dear All,

I Have a dataframe like that:

Name1 Name2 category

mauro francesco E234
luca   giuseppe  E5578
luca   franco  E5569
maria luca E4556
I would like to calculate the frequency of many time in my data I found  in 
the list name:


for(i in 1:lenght(name1)){
 re <-which(name1 == name2)


So how can create a table of frequncy of many times I found a name in column 
one respect to the second ?
Thanks in advance for your help!

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