Originally posted by: SystemAdmin

[miretama said:]

Someone can help us to solve a problem LP starting from a initial solution?
We need an example about the way to set to cplex a initial solution using, for example, cplex.setVectors.

first of all, we established the next code before cplex.solve() sentence.

cplex.setParam(IloCplex::AdvInd, 1);

then we make a IloNumArray and set the initial solution. then put in the code:

cplex.setVectors(prop,0,var,0,0,0);

where prop is a IloNumArray and var is a IloNumVarArray from the models.

Is right this way or lack of anything?

thanks.
#CPLEXOptimizers
#DecisionOptimization

Originally posted by: SystemAdmin

[MaryFenelon said:]

Since you are only providing primal information to CPLEX, you must tell CPLEX to use primal.  Do this with

    cplex.setParam(IloCplex::RootAlg, IloCplex::Primal)

Note that the primal simplex algorithm guesses a basis from the primal values you provide and often this is not a very good guess.  Starting without a solution and using the default algorithm (dual simplex) might be faster.

#CPLEXOptimizers
#DecisionOptimization