Hi All,
   
  I have two variables X, Y. The question is "if the value of X is equal to one, then the values in Y have to be reversed other wise it should not perfom any action. I think this should be done using lapply function?
   
  Example
   
  Y values : 1 2 3  NA
  X      Y (ORIGINAL)     Y (REVERSED)
  1             NA                       1
  0             ----                      ---
  1               2                         3
  1               1                         4
  1               3                         2
  ...............
   
  Can anyone provide solution to this?
   
  Thanks,
  Pratap                  
   

       
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