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AW: st: Collapse with sum function and missing values


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   AW: st: Collapse with sum function and missing values
Date   Wed, 10 Feb 2010 12:02:55 +0100

<> 

Or use the -count- provided by -collapse-:



*************
clear

inp group x
1 10
1 11
1 12
2 20
2 21
2 22
3 .
4 .
4 .
5 0
5 .
6 .
6 7
6 0
end

collapse (sum) x (count) nonmiss=x, by(group)
replace x=. if nonmiss==0
drop nonmiss

list 
*************





HTH
Martin

-----Ursprüngliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von raoul reulen
Gesendet: Mittwoch, 10. Februar 2010 11:56
An: statalist@hsphsun2.harvard.edu
Betreff: Re: st: Collapse with sum function and missing values

Or use the following suggestion by Nick Cox:

http://www.stata.com/statalist/archive/2004-07/msg00783.html
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