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Re: st: using regex

From   Phil Clayton <>
To   <>
Subject   Re: st: using regex
Date   Fri, 03 Dec 2010 09:05:38 +1030

Why not just: 
gen fips=trunc(real(code)/1000) 
That creates fips as a numeric variable rather than string variable. You could 
always add a string() function if you wanted it in string format for some reason. 
On Fri 03/12/10 09:22 , Rijo John sent: 
> Hi statlist, 
> I have a string variable (code) with state and county codes merged. 
> For example, the observation 12001 indicate that the first 2 digits 
> are state codes and the remaining 3 digits are county codes. I want to 
> create a new variable (fips) only with the state code.  I use the 
> following 
> gen fips = regexs(0) if(regexm(code, "[0-9][0-9]")) 
> and it works fine when the code contains 5 digits. But if a particular 
> state code is only 1 digit and thereby the string "code" only has 
> atotal of 4 digits the trick above does not work. In such cases I want 
> to only extract the first digit. 
> Can someone help? 
> Thanks. 
> Rijo. 
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