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st: cluster analysis
From
Gianluca Cafiso <[email protected]>
To
"[email protected]" <[email protected]>
Subject
st: cluster analysis
Date
Tue, 24 Jan 2012 11:16:52 +0000 (GMT)
Dear Stata users,
I am in need of your guidance once again.
I have run this cluster analysis:
cluster kmeans X1 X2 if id_X3==1, k(2) name(ca2) s(prandom) keepcen
cluster list ca2
cluster query ca2
return list
sreturn list
However, I do not manage to get the following information related to the cluster analysis:
1 - the initial mean values used as group centers
(I command the way they are defined "prandom", but I want to see the values too)
2 - the value of the dissimilarity measure (L2, euclidian)
Furthermore:
- Is there a way to test statistically whether my partition makes sense?
(I mean: do the data really flow into 2 groups?)
A statistician friend of mine suggested to look at Wilks' lamda.
Does anybody know if it makes sense with Stata's cluster algorithm and , if so,
how to get it?
Thanks for any clarification about it.
__________________________________________________________
Dr. Gianluca Cafiso
University of Catania, Department of Economics and QM.
Corso Italia 55, 95129 Catania - Italy.
E-mail:[email protected]
Phone: +39 095 7537 745
link to my Personal Webpage
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