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https://issues.apache.org/jira/browse/MAHOUT-1754?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Suneel Marthi closed MAHOUT-1754.
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> Distance and squared distance matrix routines
> ---------------------------------------------
>
> Key: MAHOUT-1754
> URL: https://issues.apache.org/jira/browse/MAHOUT-1754
> Project: Mahout
> Issue Type: Blog - New Blog Request
> Reporter: Dmitriy Lyubimov
> Assignee: Dmitriy Lyubimov
> Fix For: 0.10.2
>
>
> R analogs: dist()
> this issue suggests to provide routine for distance and squared distance
> matrix computation.
> Since most of the use actually requires or can use square distance routine,
> we suggest to provide both squared and non-squared eucledian distance
> matrices.
> By convention, distributed versions are prepended by (d) letter:
> dist(x)
> sqDist(x)
> dsqDist
> The points are assumed to be row-wise.
> We also provide variation for pair-wise distance matrix of two different
> inputs x and y:
> sqDist(x,y)
> dsqDist(x,y).
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