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

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.0, 3.1
• Fix Version/s: 3.2
• Assignee: Unassigned
• Reporter: Gilles Sadowski
• Created: 13/Dec/12 13:28
• Updated: 07/Apr/13 09:17
• Resolved: 09/Mar/13 17:38

Description

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.