Are these 2 runs of a Kmeans algorithm (on the same set of cases with
the same variables) or (on the same set of cases with different
variables) or (on different sets of cases with the same variables)?
Do the runs look for the same number of clusters?
if two points belong to the same cluster
> in both clusterings this means that they are similar.
If you have runs on the same set of cases and the same set of variables,
CROSSTABing the memberships in the clusters will tell you exactly this.
Art
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Social Research Consultants
University Park, MD USA
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Sirotkin, Alexander wrote:
> Hello.
>
> From a few responses I got to my previous email I understand that I
> did not formulate my question clear enough.
>
> What I meant by "compare two clusterings" is not to find out which
> clustering is better  this information is usually provided by the kmeans
> algorithm in a form of withincluster sum of squares.
>
> What I actually meant was a measure of how much these two clusters
> are similar. In other words  if two points belong to the same cluster
> in both clusterings this means that they are similar.
>
> Thanks a lot....
>
