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Re: st: AW: dropping values
From
[email protected]
To
[email protected]
Subject
Re: st: AW: dropping values
Date
Tue, 8 Jun 2010 10:53:12 -0400
Thanks Nick and Martin
David J Svendsgaard, PhD
Biostatistician
EPA/ORD/NCEA/RTP, Mail Drop B-243-01
Research Triangle Park, NC 27711
Phone (919) 541-4186
Fax (919) 541-1818
From: "Martin Weiss" <[email protected]>
To: <[email protected]>
Date: 06/08/2010 10:50 AM
Subject: st: AW: dropping values
Sent by: [email protected]
<>
Just wrap the thing in the -float()- function:
*************
clear*
inp so2conc
0
.2
.25
.3
.4
.5
.6
1.0
end
drop if so2conc==0.2
drop if so2conc==float(0.2)
*************
See http://www.stata.com/support/faqs/data/float.html
HTH
Martin
-----Ursprüngliche Nachricht-----
Von: [email protected]
[mailto:[email protected]] Im Auftrag von
[email protected]
Gesendet: Dienstag, 8. Juni 2010 16:24
An: [email protected]
Betreff: st: dropping values
I think there is a problem with dropping values of a variable.
I have a variable named so2conc and it has values 0 .2 .25 .3 .4 .5 .6
1.0
If I use
drop if so2conc==0.2
nothing gets dropped.
If I use
egen so2=group(so2conc)
and then
drop if so2==2
then I get dropped what I need dropped.
I think the problem is that so2conc is stored as a real value.
Has anyone else had this problem or is there something written about
avoiding this problem?
Thanks,
Dave
David J Svendsgaard, PhD
Biostatistician
EPA/ORD/NCEA/RTP, Mail Drop B-243-01
Research Triangle Park, NC 27711
Phone (919) 541-4186
Fax (919) 541-1818
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