PSPP-BUG: [bug #46283] QUICK CLUSTER makes poor choice of initial cluster centers

[John Darrington]

URL:
  <http://savannah.gnu.org/bugs/?46283>

                 Summary: QUICK CLUSTER makes poor choice of initial cluster
centers
                 Project: PSPP
            Submitted by: jmd
            Submitted on: Sat 24 Oct 2015 06:58:52 PM CEST
                Category: None
                Severity: 5 - Average
                  Status: None
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
                 Release: None
                  Effort: 0.00

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Details:

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.







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