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Re: st: Generating a Variable


From   Don Ruby <goofnmick@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Generating a Variable
Date   Sun, 13 Feb 2011 20:46:26 -0500

Ha ha, well, we all have n-tuple personalities. I should clarify,
because I think this ought to be soluble. The person Sid=2 is the same
as Mid=2. Thus, Ms and Ss smoking behavior are all contained in this
data set, but I have only the "Msmoke" variable which refers to Ms
smoking behavior. I now need a variable that indicates whether the
sibling also smoked, so the created variable should be "Smoke".

Is it possible to generate "Smoke" given the other columns?



On Sun, Feb 13, 2011 at 8:21 PM, Nick Cox <njcoxstata@gmail.com> wrote:
> This doesn't seem soluble with your example data. The only information
> on who smokes concerns the mothers. Perhaps Goof wrote this mail.
>
> However, there is an FAQ detailing technique in this territory.
>
> FAQ     . . Creating variables recording prop. of the other members of a group
>        . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  N. J. Cox
>        4/05    How do I create variables summarizing for each
>                individual properties of the other members of a
>                group?
>                http://www.stata.com/support/faqs/data/members.html
>
> and this also may be useful:
>
> FAQ     . . Creating variables recording whether any or all possess some char.
>        . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  N. J. Cox
>        2/03    How do I create a variable recording whether any
>                members of a group (or all members of a group)
>                possess some characteristic?
>                http://www.stata.com/support/faqs/data/anyall.html
>
> On Sun, Feb 13, 2011 at 5:23 PM, Don Ruby <goofnmick@gmail.com> wrote:
>
>> Suppose I have the following data (excepting Ssmoke which I need to create):
>>
>>    +--------------------------------------------------------+
>>    |   Mid   Sid  Famid  Msmoke   Ssmoke |
>>    |----------------------------------------------------------|
>>  1. |    1      2      1         0              1         |
>>  2. |    2      1      1         1              0         |
>>  3. |    3      4      2         1              0         |
>>  4. |    4      3      2         0              1         |
>>    +--------------------------------------------------------+
>>
>> Where Mid is a mother id, Sid is a sibling id, and Famid is a family
>> id. Msmoke indicates that the mother smoked.
>>
>> What is the simplest way to create a variable "Ssmoke" that equals 1
>> if a sibling smoked, and 0 otherwise? (Note, there are families in
>> which there are more than 2 siblings.)
>
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