Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: RE: st: A bug in egen and gen?
From
Maarten buis <[email protected]>
To
[email protected]
Subject
RE: RE: st: A bug in egen and gen?
Date
Fri, 18 Feb 2011 16:31:24 +0000 (GMT)
--- On Fri, 18/2/11, Liao, Junlin wrote:
> You may have most of the variables in decimal and double
> could very well inflate your dataset to double its size. But
> I doubt the majority of Stata users are not in that camp.
My guess would have been that the majority does have most
variables as non-integers, but if there is one thing I have
learned from the Statalist is that the way Stata is used and
the kind of problems people run into is far more heterogenous
than I could have ever dreamed of, so I am not willing to
call this anymore than a guess.
> The -compress- command missing opportunity to reduce double
> to float can be easily demonstrated.
>
> . set type double
>
> . clear
>
> . gen a=4.1
<snip>
If you really believe that your data is so precisely
measured that it needs to be entered as doubles, than
you should not convert double 4.1 to float 4.1; they
are not the same number:
. di %21x 4.1
+1.0666666666666X+002
. di %21x float(4.1)
+1.0666660000000X+002
-- Maarten
--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany
http://www.maartenbuis.nl
--------------------------
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/