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2005 Jan 21
2
Need help to transform data into co-occurence matix
Dear R experts,
I have the data in the following fomat(from some kind of card sorting process)
 
ID  Category   Card numbers
1   1               1,2,5
1   2               3,4
2   1               1,2
2   2               3
2   3               4,5
 
I want to transform this data into two co-occurence matrix (one for each ID)
-- For ID 1
   1 2 3 4 5
1 1 1 0 0 1
2 1 1 0 0 1
3 0 0 1 1 0
4 0 0 1 1 0
5 1