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st: combining two variables


From   <nora@uchicago.edu>
To   statalist@hsphsun2.harvard.edu
Subject   st: combining two variables
Date   Wed, 7 Mar 2007 10:18:49 -0600 (CST)

Thank you to everyone who answered my last question on
creating a variable corresponding to the row number.

Now I have a question about combining the data from two
variables (in the same data set) into one variable. I want to
combine the variables in such a way that the data from one
variable can replace the missing values from the other. I have
created an example of what I am looking for below:


           Have:                   Want:
      var1       var2              newvar
        .          2                 2
        .          8                 8
        .          0                 0
        7          .                 7
        3          .                 3
        .          .                 .

Any thoughts on how to do this? 


Thanks
Eleanor Friedman 
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