Chiungya wrote:
I ... would like to use it to analyze a set of dyadic data.
The data is as following:
Group member V1
　1 1 3.2
　1 2 4.5
　2 1 3.1
　2 2 3.3
　3 1 .
　3 2 2.3
I wish to generate a new variable--V2 in which responses from V1
are exchanged within a group. So, it should look like this:
Group member V1 V2
　1 1 3.2 4.5
　1 2 4.5 3.2
　2 1 3.1 3.3
　2 2 3.3 3.1
　3 1 . 2.3
　3 2 2.3 .
-----------------------------------------------------------------
Use explicit subscripting (see -help subscripting-) to get
information from neighbour observations:
sort group member
generate v2=v1[_n+1] if group==group[_n+1] & member==1
replace v2=v1[_n-1] if group==group[_n-1] & member==2
Hope this helps
Svend
__________________________________________
Svend Juul
Institut for Folkesundhed, Afdeling for Epidemiologi
(Institute of Public Health, Department of Epidemiology)
Vennelyst Boulevard 6
DK-8000 Aarhus C, Denmark
Phone: +45 8942 6090
Home: +45 8693 7796
Email: [email protected]
__________________________________________
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