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From "Edward J. Yoon (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HAMA-219) Cramer's rule
Date Wed, 18 Nov 2009 09:08:39 GMT

    [ https://issues.apache.org/jira/browse/HAMA-219?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12779375#action_12779375
] 

Edward J. Yoon commented on HAMA-219:
-------------------------------------

1) It would be nice to add a unit test to check that function is working properly or not.
2) I think, your code is simply good. BTW, jacobiEigenValue seems has some bug.
I expected this result is same to { 29.6, 26, 28 } but, something's wrong.


Given problem:
-----------A-----------
25.0  -5.0  -20.0  
-5.0  10.0  -4.0  
-5.0  -4.0  9.0  
-----------b-----------
50.0  
0.0  
0.0  

Result:
x1=0.4173228346456694
x2=4.6929133858267695
x3=7.874015748031496

> Cramer's rule
> -------------
>
>                 Key: HAMA-219
>                 URL: https://issues.apache.org/jira/browse/HAMA-219
>             Project: Hama
>          Issue Type: New Feature
>          Components: matrix
>            Reporter: Sangwon Seo
>            Assignee: Sangwon Seo
>            Priority: Trivial
>         Attachments: HAMA-219_v01.patch
>
>
> How about  applying Cramer's rule to solve the solution(x), such that Ax = b.
> It can be simply possible with our component of Eigenvalue.

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