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Re: st: Average of three variables with data missing


From   David K Evans <dkevans@fas.harvard.edu>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Average of three variables with data missing
Date   Tue, 9 Nov 2004 09:24:42 -0500 (EST)

Yes.

Do

egen average=rmean(var1 var2 var3)

It will take the average of all non-missing observations.
Dave

------------------------------------------------------------------------

PhD student, Harvard Economics Department
Phone: (O) 617-495-5634, (H) 617 - 493 - 1536
Address: Currier Mail Center #554, Cambridge, MA 02138

------------------------------------------------------------------------

On Tue, 9 Nov 2004, Herve STOLOWY wrote:

> Dear All:
>
> I would like to compute the average of three variables for several observations. For some of them, data is missing for one or two variables.
>
> I do:
>
> gen average=(var1+var2+var3)/3
>
> When one figure (at least) is missing, Stata returns a missing average.
>
> Is there an easy way to tell Stata to compute the average on the available data (one, two or three depending on the observations), even though some data are missing?
>
> Best regards
>
> Hervé Stolowy
>
> ***********************************************************
> HEC Paris
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> 1, rue de la Liberation
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>
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