hama-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HAMA-13) Scalar and Matrix Multiplication
Date Tue, 02 Sep 2008 08:58:44 GMT

    [ https://issues.apache.org/jira/browse/HAMA-13?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12627609#action_12627609

Hudson commented on HAMA-13:

+1 overall.  Here are the results of testing the latest attachment 
against trunk revision 690854.

    @author +1.  The patch does not contain any @author tags.

    tests included +1.  The patch appears to include 6 new or modified tests.

    javadoc +1.  The javadoc tool did not generate any warning messages.

    javac +1.  The applied patch does not generate any new javac compiler warnings.

    release audit +1.  The applied patch does not generate any new release audit warnings.

    findbugs +1.  The patch does not introduce any new Findbugs warnings.

    core tests +1.  The patch passed core unit tests.

Test results: http://hudson.zones.apache.org/hudson/job/Hama-Patch/56/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hama-Patch/56/artifact/trunk/build/reports/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hama-Patch/56/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hama-Patch/56/console

This message is automatically generated.

> Scalar and Matrix Multiplication 
> ---------------------------------
>                 Key: HAMA-13
>                 URL: https://issues.apache.org/jira/browse/HAMA-13
>             Project: Hama
>          Issue Type: Improvement
>          Components: implementation
>            Reporter: Edward J. Yoon
>            Assignee: Edward J. Yoon
>             Fix For: 0.1.0
>         Attachments: HAMA-13.patch
> There are two types of multiplication for matrices: scalar multiplication and matrix
multiplication. Scalar multiplication is easy. You just take a number (called a "scalar")
and multiply it on every entry in the matrix. For example,
> For the following matrix A, find 2A :
> 2A = 2- {[a, b], [c, d]} = {[2- a, 2- b], [2- c, - d]}
> however, matrix multiplication is quite another story. We need to multiply the ROWS of
A by the COLUMNS of B. By this I mean that I first take the first row of A and the first column
of B, and we multiply the first entries, then the second entries, and then the third entries,
and then we add the three products. The sum is one entry in the product matrix AB.
> reference : http://carbon.cudenver.edu/csprojects/CSC5809S01/Simd/parmult.html

This message is automatically generated by JIRA.
You can reply to this email to add a comment to the issue online.

View raw message