Originally posted by: Sothea

Dear,

I would like to know if there is a parameter in cplex-matlab which we can define objective value precision. I mean, for exemple an objective value found 1.1296, how to make it equal to 1.1200 or 1.1300. I think this parameter can reduce calculating time if we dont need high precision. Do you have any idea?

Thanks in advance,
Sothea HONG
#CPLEXOptimizers
#DecisionOptimization

Originally posted by: John Cui

Which kind problem are you solving? MIP?
John Cui
#CPLEXOptimizers
#DecisionOptimization

Originally posted by: Sothea

Yes, it is MIP problem.
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Originally posted by: John Cui

You can consider adjusting the MIP gap parameter.
If you know your objective values are on the order of say 1e+1, and you are only interested
in the first two decimal places, you can set the MIP gap to .01/1e+1 = .001.

While this may yield a performance improvement on a few models, but
in most cases such parameter changes won't yield a significant improvement.
You'd better spend your time looking for other ways to improve performance.

Such as tune MIP related parameters(heuristics, cuts, etc.) or improve your model formulation.

John Cui
#CPLEXOptimizers
#DecisionOptimization