Originally posted by: LeonardH

Hello!

Me and a friend are working on an optimization and it would be great if someone could give us some help.

We are using Matlab to solve a MILP problem and therefore are calling up the CPLEX optimizer in the Matlab environment.

After looking for quite a while we still didn't find out how to do it best or if it is even possible.

So here is our problem:

We want to express the following term, so the CPLEX Optimizer understands it:

If sum( x(1-50) == 1) && sum( x(51-100) == 1)
x(101) = 1
end

The problem is that I don't know the system and the commands to implement such thing into the optimization.

Though it would be great if you could lend us a hand!

Thanks so much

Leo and Jannic

Originally posted by: MaryFenelon

See https://www.ibm.com/developerworks/community/forums/html/topic?id=77777777-0000-0000-0000-000014799088

Originally posted by: LeonardH

Hey Mary,

thanks for the answer! In the last couple of days we figured out a lot of new things and this was a great help.

Unfortunately, we still have a problem:

At the moment we write our model with the cplexmilp(...) command. In the link, you posted, the model is written with the Cplex() command.

Is it possible to combine these two methods? Or to clarify: Is it possible to add indicators, collumns etc. to the cplexmilp-model?

Here how it looks right now:

options = cplexoptimset('cplex');
options.diagnostics = 'on';
options.timelimit = 1*60;
options.exportmodel='test.lp';
options.mip.tolerances.mipgap = 2e-4;

[x,TotCost,exitflag,info] = cplexmilp(F,Ages,B,Aeq,beq,[],[],[],lb,ub,ctype,[],options);

Hope I made myself understandable!