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st: Return a specific bit from integer variable


From   Steinar Fossedal <steinar.fossedal@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: Return a specific bit from integer variable
Date   Sun, 4 Oct 2009 08:45:46 +0200

Hello again, listers!

I have imported an 8-bit integer variable where each bit represents a
flag telling me if some property of the observation is true or false.

E.g. the number 8 in binary format is 00001000, while 10 would be
00001010. Bit nr. 4 from the left tells me if a car is delivered or
not, while the second to the right tells me if it's paid or not. So 8
= car is delivered but not paid, 2 = paid but not delivered, 10 = paid
and delivered, etc.

I need to split this information into 8 dummyvariables so they can be
used to segment my data.

Does there exist a fairly smooth way to do this in Stata?

Cheers,
-Steinar
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