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Re: st: Comparing strings


From   Eric Booth <eric.a.booth@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Comparing strings
Date   Sat, 24 Mar 2012 17:47:09 -0500

<>

Take a look at the string function (-help string_functions-) indexnot() (e.g., "gen x = indexnot(string1, string2)" )  which will give you the leftmost position where the two strings differ.  
This Stata string function does not assign the positive/negative sign like the sas function you describe, but you can code those yourself by using other string functions to find how they differ in order/sequence/length.

- Eric

__
Eric A. Booth
Public Policy Research Institute 
Texas A&M University
ebooth@ppri.tamu.edu
+979.845.6754

On Mar 24, 2012, at 5:12 PM, jo la frite wrote:

> Dear Statalisters,
> 
> Is there a Stata function that correspondons to the Sas function "COMPARE". It allows to compare strings. Specifically, in Sas COMPARE(string-1, string-2) returns a numeric value. The sign of the result is negative if string-1 precedes string-2 in a sort sequence, and positive if string-1 follows string-2 in a sort sequence. The magnitude of the result is equal to the position of the leftmost character at which the strings differ.
> 
> Thanks!
> 
> Jo
> 
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