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st: Splitting numeric values


From   "Susan Olivia" <[email protected]>
To   <[email protected]>
Subject   st: Splitting numeric values
Date   Sun, 22 Jul 2007 15:30:39 -0700

Hi,

I have a numeric variable (call it id) that comes with 18 digits and I would
like to create a new variable that extracts from the variable 'id' starting
from the 10th digits and get 4 digits from here.

E.g. my id is given as: 610102001001010300 and I want to create 'newvar'
which has value of 0010. 

I know this can be easily done using the 'substr' command, however, I am
having a problem in converting the 'id' into string variable. It gives me
the following command: 

*** 
tostring id, replace
id cannot be converted reversibly; no replace

***

Any advice on how to handle this would be much appreciated.

Thanks,

Susan

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