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Re: st: Data types, collapse & egen


From   ariley@stata.com (Alan Riley)
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Data types, collapse & egen
Date   Mon, 12 Sep 2005 17:58:34 -0500

Eric Wruck (ewruck@econalytics.com) asks about datatypes and rounding:
> ...
> But instead of values such as  1,045,855,825 I get 1,046,000,000 
> instead.  I looked at help for double & learned that the min & max 
> values for that data type are enormous.
> ...

The number 1,045,855,825 is certainly within the number of digits
of precision offered by the double datatype.  It is hard to determine
why Eric is seeing 1,046,000,000 rather than the desired result
without seeing all of the steps that were followed to calculate this
value.

I recommend that Eric send an email to tech-support@stata.com
and attach a dataset and do-file which can be used to reproduce
the result.


--Alan
(ariley@stata.com)
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