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st: Seeing if the last observation equals previous observations from a variable X


From   George Chioran <george_chioran@yahoo.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: Seeing if the last observation equals previous observations from a variable X
Date   Sat, 24 Apr 2010 14:06:11 -0700 (PDT)

Dear Statalisters,
 
I want to know how I
could see if the last observation in a variable X (containing strings) is equal
to other observations in the variable. I know I can use X[_N] to identify the
last observation in the variable, but how could I see if I have a previously
identical observation to X[_N] in the variable?
 
Thank you a lot for
the help, 
George


      
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