Ticket #102 (closed defect: fixed)

Opened 6 years ago

Last modified 6 years ago

initial population is not used in DESolver

Reported by: mmckerns Owned by: mmckerns
Priority: major Milestone: mystic-0.2a1
Component: mystic.solvers Keywords:
Cc:

Description

initial population is not used in DESolver

Lisa Mauger reports:

The initial population created by SetInitialPoints() are never processed
through the cost function.  And the solver.bestSolution starts at [0, 0, 0, ....].
This bestSolution is used immediately by the calls to strategy to build new
trialSolutions to improve upon the "current population" - except that this
population was never scored through the cost function.  This create 2 problems:
1. You throw away the initial population without even looking at the scores
2. Best solution is [0, 0, 0, ....] for the first several calls to strategy()

I got around this by calling solver.bestSolution = fcs before I start sovler.solve().
This fixes #2 but not #1. A change in the optimizer code to push the
initialPopulation through the costfunction and look for the lowest energy in that
set (before starting the generations loop) would fix both these problems.

Change History

comment:1 Changed 6 years ago by mmckerns

  • Status changed from new to closed
  • Resolution set to fixed

fixed in r219

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