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From "Gilles (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (MATH-376) One-time initialization in "DirectSearchOptimizer"
Date Wed, 16 Jun 2010 13:57:24 GMT

     [ https://issues.apache.org/jira/browse/MATH-376?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Gilles resolved MATH-376.
-------------------------

    Fix Version/s: 2.2
       Resolution: Fixed

Implemented (second option) in r955230.


> One-time initialization in "DirectSearchOptimizer"
> --------------------------------------------------
>
>                 Key: MATH-376
>                 URL: https://issues.apache.org/jira/browse/MATH-376
>             Project: Commons Math
>          Issue Type: Bug
>            Reporter: Gilles
>            Priority: Minor
>             Fix For: 2.2
>
>
> In class  "DirectSearchOptimizer" (in package "optimization.direct"), the "optimize"
method contains this code (at line 270):
> {code}
> if (startConfiguration == null) {
>     // no initial configuration has been set up for simplex
>     // build a default one from a unit hypercube
>     final double[] unit = new double[startPoint.length];
>     Arrays.fill(unit, 1.0);
>     setStartConfiguration(unit);
> }
> {code}
> I think that this has the consequence that it is impossible to call "optimize" a second
time, where one would like to solve a problem with a different dimension.

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