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From "Phil Steitz (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MATH-1191) QRDecomposition decompose and performHouseholderReflection methods ignore matrix parameters
Date Sat, 10 Jan 2015 16:17:34 GMT

     [ https://issues.apache.org/jira/browse/MATH-1191?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Phil Steitz updated MATH-1191:
------------------------------
    Description: The protected decompose and performHouseholderReflection methods in QRDecomposition
act on the qr matrix set by the constructor, not whatever matrix is supplied as actual parameter.
 For 3.x, the javadoc should be updated to indicate that the actual parameter is ignored.
For 4.0, the parameters should be removed.  Alternatively, implementations could be changed
to act on the arguments.  (was: The protected decompose and performHouseholderReflection methods
in QRDecomposition act on the qr matrix set by the constructor, not whatever matrix is supplied
as actual parameter.  For 3.x, the javadoc should be updated to indicate that the actual parameter
is ignored. For 4.0, the parameters should be removed.)

> QRDecomposition decompose and performHouseholderReflection methods ignore matrix parameters
> -------------------------------------------------------------------------------------------
>
>                 Key: MATH-1191
>                 URL: https://issues.apache.org/jira/browse/MATH-1191
>             Project: Commons Math
>          Issue Type: Bug
>    Affects Versions: 3.3
>            Reporter: Phil Steitz
>             Fix For: 4.0, 3.4.2
>
>
> The protected decompose and performHouseholderReflection methods in QRDecomposition act
on the qr matrix set by the constructor, not whatever matrix is supplied as actual parameter.
 For 3.x, the javadoc should be updated to indicate that the actual parameter is ignored.
For 4.0, the parameters should be removed.  Alternatively, implementations could be changed
to act on the arguments.



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