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Posted to issues@commons.apache.org by "Gilles (JIRA)" <ji...@apache.org> on 2012/12/13 14:30:11 UTC

[jira] [Created] (MATH-914) Inconsistent multi-start randomization (optimizers)

Gilles created MATH-914:
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             Summary: Inconsistent multi-start randomization (optimizers)
                 Key: MATH-914
                 URL: https://issues.apache.org/jira/browse/MATH-914
             Project: Commons Math
          Issue Type: Bug
    Affects Versions: 3.0, 3.1
            Reporter: Gilles
            Priority: Minor
             Fix For: 3.2


In class "o.a.c.m.optim.BaseMultiStartMultivariateOptimizer", the "starting points" generator is passed at construction. But random initial guesses must fulfill the bound constraint and be somehow related to the user-supplied initial guess; and those are passed to the "optimize" method and thus can change from one call to the other, leading to inconsistent (and probably useless) multi-starts.


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