Talk:Cluster analysis (in marketing)

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[edit] Cluster analysis v. Factor analysis

I could be wrong but I think that cluster analysis can be seen as a graphical complement to factor analysis rather than its opposite. If that is meant by 'obverse' in the section I pasted below then fleshing out the relationship between the two would be helpful to the reader. Antonrojo 14:01, 1 May 2006 (UTC)

"It is similar to multi dimensional scaling in that both examine inter-object similarity by examining the complete set of interdependent relationships. The difference is that multi dimensional scaling identifies underlying dimensions, while cluster analysis identifies clusters. Cluster analysis is the obverse of factor analysis. Whereas factor analysis reduces the number of variables by grouping them into a smaller set of factors, cluster analysis reduces the number of observations or cases by grouping them into a smaller set of clusters."