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https://issues.apache.org/jira/browse/MAHOUT-599?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lance Norskog updated MAHOUT-599:
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Attachment: MAHOUT-599.patch
> AbstractMatrix uses clone() where it should use like()
> ------------------------------------------------------
>
> Key: MAHOUT-599
> URL: https://issues.apache.org/jira/browse/MAHOUT-599
> Project: Mahout
> Issue Type: Improvement
> Components: Math
> Reporter: Lance Norskog
> Priority: Minor
> Fix For: 0.5
>
> Attachments: MAHOUT-599.patch
>
>
> The AbstractMatrix.java class uses clone() instead of like() in the methods
> which create a new matrix and populate it with calculated data. This means
> that the contents of 'this' is copied into the return matrix, then promptly
> overwritten.
> This patch fixes this problem by substituting like() and changing the code to
> not rely on having the values of 'this' in the clone.
> Also, this allows generated matrices like a random matrix to reuse the code
> from AbstractMatrix; read-only matrices cannot populate their clones.
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