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st: how to count the number of certain characters in a string variable?


From   [email protected]
To   statalist<[email protected]>
Subject   st: how to count the number of certain characters in a string variable?
Date   Tue, 28 Jul 2009 22:05:43 +0800

Dear statalists,

I have a string variable X as follows:

X                Y

aabb            2

bbdd            0

cdba            1

dxbaa          2

dxaa            2

I want to generate a variable Y to stand for the number of certain characters, 
such as "aa" and replace these characters with other characters, such as "zz".


How to do it ?

Thank you !

Sincerely,




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