Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
st: data manipulation question
From
DC <[email protected]>
To
Statalist Statalist <[email protected]>
Subject
st: data manipulation question
Date
Tue, 10 Aug 2010 19:23:58 -0400
Hi All,
I have a question about the correct procedure to assign indicators of
events occurring to nearest neighbors to individual identifiers .
Specifically, I have data that look something like this:
id race quarter move nn1 nn2 nn3
1 1 1 0 2 3 4
1 1 2 0 2 3 4
1 1 3 1 2 3 4
2 0 1 0 1 4 3
2 0 1 1 1 4 3
3 0 1 0 5 1 4
3 0 2 1 5 1 4
4 0 1 0 3 2 5
4 0 2 0 3 2 5
4 0 3 1 3 2 5
5 1 1 0 5 2 1
5 1 2 1 5 2 1
where id, race, quarter, and move are pretty straight forward. nn1,
nn2, nn3 denote a ranking of the 3 nearest neighbors to unit_ i.
I would like to construct indicators first denoting whether unit_ i
saw a move in nn_ j in quarter_ t. Conditional on seeing a move in
nn_ j
I would like to assign a racial indicator. In other words, something like this:
id race quarter move nn1 nn2 nn3 move_nn1
move_nn2 move_nn3
1 1 1 0 2 3 4
0 0 0
1 1 2 0 2 3 4
2 2 0
1 1 3 1 2 3 4
0 0 2
2 2 1 0 1 4 3
0 0 0
2 2 2 1 1 4 3
0 0 2
3 2 1 0 5 1 4
0 0 0
3 2 2 1 5 1 4
1 0 0
4 2 1 0 3 2 5
0 0 0
4 2 2 0 3 2 5
2 2 1
4 2 3 1 3 2 5
0 0 0
5 1 1 0 3 2 1
0 0 0
5 1 2 1 3 2 1
2 2 0
It is a bit complicated. Any help would be greatly appreciated.
Regards,
Marcus
Marcus Casey, Ph.D.
Duke University
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/