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st: RE: Re: Decimal precision, again


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Re: Decimal precision, again
Date   Fri, 25 Jul 2003 17:09:26 +0100

Michael is right. What has been washed out to sea
cannot be retrieved by stepping again into the
same stream.

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

> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu]On Behalf Of Michael
> Blasnik
> Sent: 25 July 2003 16:52
> To: statalist@hsphsun2.harvard.edu
> Subject: st: Re: Decimal precision, again
>
>
> Sorry....but how could that possibly work?  When a variable
> is stored as a
> float, the precision beyond float is lost.  To be able to
> recover greater
> precision means that Stata would have to some how keep all
> variables scretly
> in double precision and only pretend that floats are float.
>  Display formats
> can have pretend precision, not the actual storage type.
>
> Michael Blasnik
> michael.blasnik@verizon.net
>
>
> ----- Original Message -----
> From: "SJ Friederich, Economics" <S.Friederich@bristol.ac.uk>
> To: <statalist@hsphsun2.harvard.edu>
> Sent: Friday, July 25, 2003 11:34 AM
> Subject: st: Decimal precision, again
>
>
> > Dear listers,
> >
> > Yes, it's about that old favourite of this List, the
> storage type/decimal
> > precision issue, which keeps popping up here so regularly
> and under so
> many
> > different guises. In spite of several clarifying messages
> by Bill Gould
> > over the years, I can't claim that I understand all aspects this.
> >
> > Say I made a mistake in -insheet-ing some data (or, ahem,
> just because the
> > "double" option of -insheet- didn't work well until
> recently) and I think
> a
> > particular variable appearing as a float in my data
> should really be there
> > with double precision.
> >
> > Re-processing this data from scratch would represent a
> tremendous drag.
> > Would outsheeting the Stata dataset and re-insheeting it using the
> "double"
> > option fix this unambiguously? (I would think so but it
> just seems too
> > simple)
> >
> > Many thanks for any comments.
> >
> > Sylvain
> >
>
>
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