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Re: st: A bug in egen and gen?


From   Marcello Pagano <pagano@hsph.harvard.edu>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: A bug in egen and gen?
Date   Fri, 18 Feb 2011 08:16:40 -0500

Don't forget the "missings"; an important consideration to practicing statisticians!

m.p.

On 2/18/2011 5:36 AM, Nick Cox wrote:
As said, I can -compress- doubles to bytes when there is no loss of precision.

. about

Stata/SE 11.1 for Windows (32-bit)
Born 04 Nov 2010
Copyright (C) 2009 StataCorp LP

[...]

. set obs 1
obs was 0, now 1

. gen double compressable = 42

. compress
compressable was double now byte

You should supply specific examples of where you think that is not happening. Please use the %21x format to make clear what is happening at machine level.

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

Liao, Junlin

Unless someone changed the command, my version of Stata 11 does not compress double to float when it can do so. This is also indicated in the documentation. However, I can recast a variable to float if there is no loss of precision, otherwise I have to put in the /force option to force convert with loss of precision.


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