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https://issues.apache.org/jira/browse/MATH-1524?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gilles Sadowski updated MATH-1524:
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Attachment: centroid.png
getCenter.png
I've attached the screenshot generated from the {{ClusterAlgorithmComparison}}
class defined "src/userguide".
It clearly shows the advantage of {{Cluster}} having a method to _compute_ the
center/centroid: The latter is not a property of the clustering algorithm but
of the clusters themselves (in particular, the "DBScan" column now displays
the centers).
> "chooseInitialCenters" should move out from KMeansPlusPlusClusterer
> -------------------------------------------------------------------
>
> Key: MATH-1524
> URL: https://issues.apache.org/jira/browse/MATH-1524
> Project: Commons Math
> Issue Type: Improvement
> Reporter: Chen Tao
> Priority: Major
> Attachments: centroid.png, getCenter.png
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> There are two reason for "chooseInitialCenters" should be move out from
> "KMeansPlusPlusClusterer":
> # k-means++ clusterer is a special case of k-means clusterer, that k-means++
> initialize the cluster centers with k-means++ algorithm. Another case is
> initialize the cluster centers with random points.
> # The mini batch k-means will reuse "chooseInitialCenters".
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