Hi
the CPLEX / Decision Optimization community :
ibm.biz/DOcommunity
For the solution pools question let me change a bit the example from https://github.com/AlexFleischerParis/zooopl/blob/master/zooseveral.mod
I add
cplex.solnpoolcapacity=2;
cplex.solnpoolreplace=1;
So I use
int nbKids=300;
float costBus40=500;
float costBus30=400;
dvar int+ nbBus40;
dvar int+ nbBus30;
minimize
costBus40*nbBus40 +nbBus30*costBus30;
subject to
{
40*nbBus40+nbBus30*30>=nbKids;
}
execute
{
writeln("nbBus40 = ",nbBus40," and nbBus30 = ",nbBus30," and the cost is ",costBus40*nbBus40 +nbBus30*costBus30);
}
main {
cplex.solnpoolintensity=4;
cplex.solnpoolcapacity=2;
cplex.solnpoolreplace=1;
thisOplModel.generate();
cplex.solve();
if (cplex.populate()) {
var nsolns = cplex.solnPoolNsolns;
writeln("Number of solutions found = ",nsolns);
writeln();
for (var s=0; s<nsolns; s++) {
thisOplModel.setPoolSolution(s);
thisOplModel.postProcess();
}
}
}
which gives
Number of solutions found = 2
nbBus40 = 6 and nbBus30 = 2 and the cost is 3800
nbBus40 = 3 and nbBus30 = 6 and the cost is 3900
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[Alex] [Fleischer]
[EMEA CPLEX Optimization Technical Sales]
[IBM]
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Original Message:
Sent: Thu March 04, 2021 09:06 AM
From: Muhammad Ismail
Subject: limiting number of solution and getting rapid solutions
Dear, I want to keep only one or two best solutions instead of 20 or more solutions in cplex. How to set this.
Also, how can I set relaxation to get solutions faster.
Best Regards
Ismail
------------------------------
Muhammad Ismail
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