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st: replacement of missing values [was: RE: Help]


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: replacement of missing values [was: RE: Help]
Date   Mon, 7 Mar 2005 14:04:22 -0000

Please use informative headings for your posts, 
as requested in the FAQ and repeatedly on this list. 

The first non-missing value in each household is 

bysort hhid (indicode member) : gen firstnonmiss = indicode[1] 

except that this will return missing if all values
in any household are missing. 

so it sounds as if you want to impute like this

replace indicode = firstnonmiss if mi(indicode) & member == 1 

I can't see that -collapse- could help here. 

Nick 
n.j.cox@durham.ac.uk 

Fanwell Kenala Bokosi
 
> I want to generate a code for the household industry. The 
> household industry is the industry in which the household 
> head is engaged in. However for some households where the 
> industry code is missing for the household head, I want to 
> assign the next non missing industry code as the for the household.
> 
> My data looks like this
> 
> hhid member indicode
> 1         1                 1
> 1          2                 2
> 1          3                  3
> 2           1                  .
> 2            2                 4
> 2            3                  4
> 3            1                   .
> 3            2                   .
> 3            3                   1
> 
> I used the collapse command to get the household industry but 
> do not seem to find a command that can be combined with 
> collapse to pick the first non missing indicode for the household.
> 

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