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st: RE: Compare values from two datasets

From   "Kavetsos, Georgios" <[email protected]>
To   <[email protected]>
Subject   st: RE: Compare values from two datasets
Date   Wed, 16 Jan 2008 18:53:40 -0000

Hi Gao,
Generate a new variable, say x,  using the following:
generate x=1 if A==B
For the case the two variables are equal, the 1 will appear, otherwise a missing value (indicated by .) will appear.


From: [email protected] on behalf of Gao Liu
Sent: Wed 16/01/2008 18:51
To: [email protected]
Subject: st: Compare values from two datasets

Hi, Statalist:

I have two datasets A and B. I need to create a dummy variable in A to
tell me whether the value of a string variable (say lic_no ) in A
matches any value in the variable of psycho_lic_no in B. Simply put, I
want to see whether the value for each obs. in A is on a list. But as
the list (the value of psycho_lic_no in B) is so long (over 10000), it
is inconvenient to copy and paste all the values, and compare them
with the lic_no one by one.

Any good way to make the job easier? Thank you.


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