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st: RE: To expand the value of a constant variable across the panel


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: To expand the value of a constant variable across the panel
Date   Thu, 1 Apr 2010 19:54:56 +0200

<>

*******
clear*

input byte( pid visit gender) 
1      1          1
1      2           .
1      3           .
1      4           1
2      1           .
2      2           .
2      3           0
2      4           .
end

tempvar mymax
bys pid: egen `mymax'=max(gender)
replace gender=`mymax' if mi(gender)

list, noo sepby(pid)
*******


HTH
Martin

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Eduardo Nunez
Sent: Donnerstag, 1. April 2010 19:49
To: statalist@hsphsun2.harvard.edu
Subject: st: To expand the value of a constant variable across the panel

Dear statalisters,

I have longitudinal data where patients have information on several timepoints.
Some values from constant variables are missing. How should I fill in
these observations across the panel (pte id)?

Example:
pid  visit#  gender
1      1          1
1      2           .
1      3           .
1      4           1
2      1           .
2      2           .
2      3           0
2      4           .
etc..................

I did tried the ssc program "enlarge" but reported error when values
existed more than once (as in pte 1).

I would appreciate any help,

Eduardo
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