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https://issues.apache.org/jira/browse/MATH-980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13666570#comment-13666570
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Thomas Neidhart commented on MATH-980:
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See the clustering example that I added recently. Vector2D is quite convenient
to create sample data, and then if you want to cluster it for example, you
would have to clone it to a DoublePoint atm, which could be avoided if the
Vector classes would implement the Clusterable interface (btw. you objected the
DoublePoint class initially if I remember correctly).
Too much coupling between packages is surely not a good thing, but in this case
I see benefits of doing so and would also allow the re-use of existing classes
within CM.
> Let the VectorXD classes in the geometry package implement Clusterable
> ----------------------------------------------------------------------
>
> Key: MATH-980
> URL: https://issues.apache.org/jira/browse/MATH-980
> Project: Commons Math
> Issue Type: Improvement
> Reporter: Thomas Neidhart
> Priority: Minor
>
> It would be quite convenient if the Vector1D, Vector2D and Vector3D classes
> could be used directly by the clustering algorithms. The updated Clusterable
> interface now only requires one method:
> * double[] getPoint()
> which is already supported by these classes: toArray()
> We could let them implement the Clusterable interface by simply delegating
> the call to getPoint() to toArray().
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