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https://issues.apache.org/jira/browse/HAMA-809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13792562#comment-13792562
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Hudson commented on HAMA-809:
-----------------------------
FAILURE: Integrated in Hama-trunk #199 (See
[https://builds.apache.org/job/Hama-trunk/199/])
HAMA-809 - small refactoring of LRM (tommaso: rev 1531265)
*
/hama/trunk/ml/src/main/java/org/apache/hama/ml/regression/LogisticRegressionModel.java
> Underflow in LogisticRegressionModel
> ------------------------------------
>
> Key: HAMA-809
> URL: https://issues.apache.org/jira/browse/HAMA-809
> Project: Hama
> Issue Type: Bug
> Components: machine learning
> Affects Versions: 0.6.1, 0.6.2
> Reporter: Tommaso Teofili
> Assignee: Tommaso Teofili
> Fix For: 0.7.0
>
>
> There's an underflow bug in _LogisticRegressionModel_ when calculating the
> hypothesis output due to _double_ limitations.
> Therefore we should leverage _BigDecimals_ for such operations as they allow
> for more precise calculation.
> Also the log algorithm in LRM is wrong and needs to be fixed.
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