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


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Seeing if the last observation equals previous observations from a variable X
Date   Sat, 24 Apr 2010 23:44:45 +0200

<>


You can create a dummy denoting any observation, other than the last one,
that is equal to the string in the last one:

*******
clear*

input str10 mystrvar
"hello"
"good-bye"
"hello"
"good-bye"
"hello"
end

//want comparison with everybody else...
gen byte dupllast=mystrvar==mystrvar[_N] if _n!=_N
list, noo
cou if dupllast==1
*******


HTH
Martin

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of George Chioran
Sent: Samstag, 24. April 2010 23:06
To: statalist@hsphsun2.harvard.edu
Subject: st: Seeing if the last observation equals previous observations
from a variable X

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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