runseeds

runseeds(model, count=30, log_output=True)

Evaluate variability of a mixed-integer DOcplex model by solving with different random seeds.

This function is a wrapper around CPLEX’s runseeds procedure that reports variability statistics in the output log. Refer to the CPLEX user manual for more details about this functionality.

Parameters:

modeldocplex.mp.model.Model

DOcplex model.

countint

The number of times to solve the model, by default 30 (same as CPLEX).

log_outputTrue or str or stream object, optional

Log output switch, in one of the following forms:

• True or '1' or 'stdout' or 'sys.stdout': Log is output to stdout.

• 'stderr' or 'sys.stderr': Log is output to stderr.

• File path (in form of str): Log is output to the file.

• Stream object (a file-like object with a write method and a flush method): Log is output to the stream object.

Default is True.

Raises:

ValueError

If the DOcplex model is not mixed-integer (MILP, MIQP, MIQCP).

ValueError

If count is not a positive number.