Closed neilireson closed 5 years ago
In a hierarchical result, a 0 element cluster can make perfect sense: it can have two non-empty child clusters (and you should always consider all child cluster members to be part of a cluster, too). Please check the hierarchy, too.
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Perhaps this is related to https://github.com/elki-project/elki/issues/41 and therefore expected.
However my (naive) understanding is that for some of these algorithms (HDBSCAN) the cluster is defined by the enclosed data points. Therefore a zero sized cluster is meaningless.