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Results tagged with docplex
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user 199
Questions related to the IBM Decision Optimization CPLEX (docplex) which is designed for modeling and solving optimization problems in Python.
4
votes
1
answer
3k
views
How to retrieve the variable's value in DOCplex
I am trying to write a simple optimization problem by using DOCPLEX. …
- 9,446
2
votes
How to obtain nodes count and nodes left in docplex (using CPLEX 12.20 and Python 3.8)
I think what you want can be seen in the CPLEX log as follows:
Tried aggregator 1 time.
Presolve time = 0.00 sec. (0.00 ticks)
MIP emphasis: balance optimality and feasibility.
MIP search method: …
- 9,446
2
votes
1
vote
Docplex : How can I get the objective value of the relaxation of an MILP?
As a simple example to work around what you want the following template would be useful:
from docplex.mp.model import Model
from docplex.mp.relax_linear import LinearRelaxer
# The originial model nam …
- 9,446
2
votes
Accepted
Converting continuous variable dict to binary variables in python docplex
This can be invoked on DoCplex by;
The_defined_variable.set_vartype('C')
Where the character "C" would be as well as either "B", "I" or "N" to convert continues, binary, integer or semi-defined variables … pip install docplex
from docplex.mp.model import Model
from docplex.mp.relax_linear import LinearRelaxer
m = Model("model")
'''
optimization model
'''
lp = LinearRelaxer.make_relaxed_model(m)
lp.print_information …
- 9,446
2
votes
Scheduling with transition costs - DOCPLEX
It should be noted that, in both options, you could try developing your model in CPLEX python API and feeding that into the DOCPLEX.
I hope it would be useful. …
- 9,446
1
vote
Updating constraint set rhs in docplex
I think the method you pointed out would be as follows:
# model
mdl = Model(name='...')
variables part
constraints like
mdl.add_constraint(LHD <=> rhs, 'name')
mdl.minimize(...)
RHS = []
for i in …
- 9,446