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From "Luc Maisonobe (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MATH-564) add a double[][] solve(double[][]) method to Decompositionsolver
Date Thu, 28 Apr 2011 10:50:03 GMT
add a double[][] solve(double[][]) method to Decompositionsolver
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                 Key: MATH-564
                 URL: https://issues.apache.org/jira/browse/MATH-564
             Project: Commons Math
          Issue Type: Improvement
    Affects Versions: 2.2
            Reporter: Luc Maisonobe
            Assignee: Luc Maisonobe
            Priority: Trivial
             Fix For: 3.0


The decomposition solver provides both RealVector and double[] types for vector solving, but
it provides only RealMatrix type for matriw solving.
This breaks symmetry and is inconvenient in some algorithms which perform lots of iterations.
Lots of copying occurs while converting back and forth between RealMatrix and arrays, with
no value added when the matrix aspect of the data is only used in the solve operation.
Adding a double[][] counterpart to RealMatrix in decomposition is also trivial as internally
the various implementations already use that.

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