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st: RE: Data Extraction from Cells


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Data Extraction from Cells
Date   Mon, 12 Jul 2010 14:56:57 +0100

"cell" here appears to mean value of a string variable in an
observation. 

"column" here appears to mean variable. 

Stata is not a spreadsheet! 

-substr()- is the appropriate function. See -help functions- and then
look under string functions. 

gen part1 = substr(whatever, 1, 2) 
gen part2 = substr(whatever, 3, 2)
gen part3 = substr(whatever, 5, 2) 

Nick 
n.j.cox@durham.ac.uk 

Samuel Finkelstein

I am currently using a dataset that
includes multiple indicators within the same cell.  For instance, if a
firm is publicly traded, was incorporated in the last five years, and
is in the utilities industry, a single cell may contain information
such as 1A3B3N, with each number/letter combination denoting one of
these characteristics (with no spaces in between the various
combinations).  Is there a way that I can extract each of the
number/letter cominations into different (newly created) columns, such
that I have one column that has 1A, one column with 3B, and one with
3N?  For my purposes, the columns can contain different
codes/identifiers.  For example, the first column could have 1A for
Company A and 2F for Company B.  I am only trying to use these codes
to identify firms with two or three specific characteristics.

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