Daer All,
 
I have a factor  variable, X with 5 levels. When I type tables(X) it gives me:
 
table(X)
1     2   3    4   5 
10   5    0   0   0
 
How to drop the levels with zeros such that when I will type:
table(X) it will give me:
 
table(X)
1     2   
10   5    
 
 
Thank a lot,
 
Bernard
 


		
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