I have next table
 
source	destine
3	 3
7	 7
6	6
3	4
4	4
4	3
3	3
3	3
3	3
3	3
3	4
4	4
4	3
3	4
4	3


I'm trying to create an array with the number of occurrences between the
source and destination.
id_ap<-levels(factor(df$v_source))
num_AP<-length(levels(factor(df$v_source)))
mat<-matrix(data=NA,nrow=num_AP,ncol=num_AP,
byrow=TRUE,dimnames=list(id_ap,id_ap))

 1  2  3  4  5  6  7
1 NA NA NA NA NA NA NA
2 NA NA NA NA NA NA NA
3 NA NA NA 4 NA NA NA
4 NA NA NA NA NA NA NA
5 NA NA NA NA NA NA NA
6 NA NA NA NA NA NA NA
7 NA NA NA NA NA NA NA

what better way to count the occurrences of the table, for example 3-4 = 4
times

Thanks
  


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