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st: RE: I visualize a different number
From
"Radwin, David" <[email protected]>
To
<[email protected]>
Subject
st: RE: I visualize a different number
Date
Tue, 18 Jun 2013 18:02:24 -0400
Actually, a more helpful explanation is available at http://blog.stata.com/2012/04/, particularly sections 3 and 4.
To answer your specify question of why, Stata presumably stored your variable as a float type, which is the default storage type. Integers are only stored precisely as floats in the range [16,777,216, -16,777,216], but doubles are stored precisely in the range [-9,007,199,254,740,992, 9,007,199,254,740,992].
Since 17,440,397,133 is outside the range of accuracy for floats but not for doubles, you should generate it as a double.
David
--
David Radwin
Senior Research Associate
Education Studies Division
RTI International
2150 Shattuck Ave., Suite 800
Berkeley, CA 94704
Phone: 510-665-8274
www.rti.org
> -----Original Message-----
> From: Radwin, David
> Sent: Tuesday, June 18, 2013 2:53 PM
> To: '[email protected]'
> Subject: RE: I visualize a different number
>
>
> Try generating it as a double.
>
> clear all
> set obs 1
> gen double x = 17440397133 in 1
> format %15.0fc x
> browse
>
> For more information, -help data_types-.
>
> David
> --
> David Radwin
> Senior Research Associate
> Education Studies Division
> RTI International
> 2150 Shattuck Ave., Suite 800
> Berkeley, CA 94704
> Phone: 510-665-8274
>
> www.rti.org
>
>
> > -----Original Message-----
> > From: [email protected] [mailto:owner-
> > [email protected]] On Behalf Of Saidé Salazar
> > Sent: Tuesday, June 18, 2013 2:45 PM
> > To: [email protected]
> > Subject: st: I visualize a different number
> >
> > Hello guys,
> >
> > I am capturing a number in Stata, but when I use the command "browse"
> > I see a different number. Any idea of what is happening? (I see
> > 17440397312 instead of 17440397133)
> >
> > clear all
> > set obs 1
> > gen x = 17440397133 in 1
> > format %15.0fc
> > br
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