Github user mgaido91 commented on the issue:
https://github.com/apache/spark/pull/20629
yes, I agree with you @MLnick. I'd like to ping also @jkbradley and @hhbyyh
who drove the PR which introduce `computeCost`.
In order to move the same metric to `ClusteringEvaluator`, I think it is
very useful what is done in this ongoing PR #20600, where `DistanceMeasure` is
moved to its own file and the `cost` method is added to it. So maybe it can be
added there after that PR. What do you think?
PS if you agree, may you please then help reviewing that PR?
Thanks.
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