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From "Edward J. Yoon (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HAMA-11) Adding and Subtracting Matrices
Date Tue, 12 Aug 2008 08:04:44 GMT

     [ https://issues.apache.org/jira/browse/HAMA-11?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Edward J. Yoon resolved HAMA-11.
--------------------------------

    Resolution: Fixed

Resolving. committed.

> Adding and Subtracting Matrices
> -------------------------------
>
>                 Key: HAMA-11
>                 URL: https://issues.apache.org/jira/browse/HAMA-11
>             Project: Hama
>          Issue Type: Improvement
>          Components: implementation
>            Reporter: Edward J. Yoon
>            Assignee: Edward J. Yoon
>             Fix For: 0.1.0
>
>
> Matrix addition/subtraction is fairly simple, and is done entry-wise. For instance:
> If Matrix A = {[a, b], [c, d]}, Matrix B = {[e, f], [g, h]},
> A + B
> Add the pairs of entries, and simplify for the final answer:
> {[a, b], [c, d]} + {[e, f], [g, h]} = {[a + e, b + f], [c + g, d + h]}
> So, we can solve this using the mapreduce by 1D row-wise partitioning.

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