bugPSPP - Bugs: bug #46283, QUICK CLUSTER makes poor choice of...

 
 

bug #46283: QUICK CLUSTER makes poor choice of initial cluster centers

Submitter:  John Darrington <jmd>
Submitted:  Sat 24 Oct 2015 04:58:52 PM UTC
   
 
Category:  None Severity:  5 - Average
Status:  Fixed Assigned to:  None
Open/Closed:  Closed Release:  None
Effort:  0.00
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Sat 24 Oct 2015 04:58:52 PM UTC, original submission:  

The initial clusters seem to be hard coded to 1s and 0s.

Hence, if a dataset is not orientated around those values, the end result will be unsatisfactory (for example all cases belonging to one cluster)

example:

DATA LIST notable LIST /x* w *.
begin data.
10 5
20 5
end data.

WEIGHT BY W.


QUICK CLUSTER  w /CRITERIA=CLUSTER(2) /PRINT=CLUSTER INITIAL.



John Darrington <jmd>
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    Follow 2 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2015-11-12 jmd StatusNone Fixed
        Open/ClosedOpen Closed

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