[
https://issues.apache.org/jira/browse/HAMA-809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13792493#comment-13792493
]
Tommaso Teofili commented on HAMA-809:
--------------------------------------
patch applied, working now on refactoring it then I'll switch to fixing log
impl.
> 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.
--
This message was sent by Atlassian JIRA
(v6.1#6144)
