Originally posted by: SystemAdmin

Hey guys,

I've only recently found out that the Populate method only produces solutions that differ in integer values (from this thread - http://www.ibm.com/developerworks/forums/thread.jspa?messageID=14899426).

This is good news for me, since I've been wanting to use the method on a MILP problem with Boolean (indicator) variables, but only cared about the values of the Boolean variables in the solutions (besides the feasibility enforced by constraints on the continuous variables).
However, I could not figure out yet whether or not values from continuous variables are counted as well when computing difference between solution, when SolnPoolReplace is set to 2 (diversity).

I'd someone more familiar with Cplex letting me know.

Thanks,
Ariel.
#CPLEXOptimizers
#DecisionOptimization

Originally posted by: RWunderling

Continuous variables are not considered in the solution pool diversity filters.

Roland
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Originally posted by: SystemAdmin

Thanks for the answer, Roland.

However, I still need some clarification.
I am well aware that only binary variables can be added to CPLEX's diversity filters, but I was asking about CPLEX's solution pool replacement strategy when SolnPoolReplace is set to "diversity", and not about solution filters.
The latter only enables control over how close/far solutions are from a set of reference solutions, while the former enables saving solutions that differ from each other.

Thanks,
Ariel.
#CPLEXOptimizers
#DecisionOptimization

Originally posted by: HEHM_Ariel_Brunner

A month has passed and I'm still without answer.

Is there anyone who happens to know it?

If not, could anyone point me out to a way of contacting the IBM support on this matter?

I'm pretty confused about the contact options. Also, if it is relevant, I'm using CPLEX from an academic initiative license.

 

Thanks,

Ariel.

#CPLEXOptimizers
#DecisionOptimization

Originally posted by: RWunderling

Also for the diversity replacement strategy, CPLEX only considers non-continuous variables.

The AI license does not include entitlement to technical support. So this forum is your best option, but we can only reply as time permits.

Roland

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#DecisionOptimization

Originally posted by: HEHM_Ariel_Brunner

Thanks Roland, that answers my question.

Much appreciated :-)

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