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st: RE: statalist-digest V4 #4433

From   "Seed, Paul" <>
To   "" <>
Subject   st: RE: statalist-digest V4 #4433
Date   Sun, 19 Feb 2012 20:20:21 +0000

On Sat, Feb 18 2012, David Cefskimal wrote:
> I am using the -cluster kmeans- command to look for opinion clusters
> kmeans- command. How to change the code including the weighting
> variable w1?

Asssuming that values of w1 are integer, David can use

expand w1
cluster kmeans v1 v2 v3 v4 v5 v6 if vC==1, k(4) 

If they are simple fractions, he can use 

gen w2 = w1*12
expand w1
cluster kmeans v1 v2 v3 v4 v5 v6 if vC==1, k(4) 

Any significance tests & confidence intervals will be invalid; but 
if you are using cluster solely as a descriptive tool, 
you won't want those anyway.

Paul Seed 

King's College London, Division of Women's Health
(& Department of Primary Care and Public Health Sciences)
St Thomas' Hospital, Westminster Bridge Road, London SE1 7EH
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