Profiles grsaphs showing centroids of clusters

Posted by Art Kendall on Feb 14, 2011; 5:19pm
URL: http://spssx-discussion.165.s1.nabble.com/Profiles-grsaphs-showing-centroids-of-clusters-tp3384796.html

I seem to recall using a trick to get profiles graphs of cluster centroids, but I cannot recall which graph I started with on the menu and then tinkered
Profile graphs are a very old-fashioned way of presenting what clusters are.  They are also useful visualizations for manova or repeated measure on a common measurement scale. The scale might be Z-scores, percentages, Likert scales on 1 to 5, etc.

The current problem:
I have 14 variables all on the same scale, zero to one.

I have calculated 5 cluster centroids via AGGREGATE.

I know that the trick was to add a file to the aggregated file  with 2 dummy cases that represent make believe clusters 6 and 7. One with all zeros and one with all one.

I want to end up with 14 vertical axes with reference lines all the way across  at .25 .50 and .75.

Each cluster would then have  a different line style/color. The lines would connect the means for a cluster across the 14 vertical axes with markers only at the leftmost and rightmost vertical axes, i.e. on the outside.


Art Kendall
Social Research Consultants


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