Hi All,
   
  I have 2 data frames as follows:
   
  a    b    c
  1   NA  1
  2   NA  2
  NA  3   3
   
  So "a", "b" are the input values and "c" is the output which I am interested in.
  NA - Missing values. I used rbind, but its not working.
   
  Let me know if anyone can help me
   
  Thanks,
  Pratap

       
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