Purpose
Add a
MIP solution to the optimizer.
Synopsis
procedure addmipsol(solid:string,s:array(set of mpvar) of real)
procedure addmipsol(solid:string,ms:mpsol)
Arguments
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solid
|
Identifier to be assigned to the solution
|
|
s
|
An array containing the solution
|
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ms
|
A solution object
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Further information
1. This function is used to provide the expectations of the modeler on the values of selected variables in possible MIP solutions. It is different to
loadmipsol in that it is not necessary to provide full, feasible MIP solutions. The values provided will be used by the Optimizer to attempt to generate full MIP solutions. The
addmipsol function can therefore be used to trial the feasibility of certain variable value assignments without the need to fix them in the problem formulation itself.
2. The solution value array
s is created by assigning values to discrete variables in the problem, such as
s(x):= 1 (where
x is a decision variable of type
mpvar). It is also possible to use a solution that has previously been saved using the procedure
savemipsol.
3. If the provided solution is found to be infeasible, a limited local search heuristic will be run in an attempt to find a close feasible integer solution.
4. The current problem definition must be loaded into the Optimizer for
addmipsol to have any effect. If this has not recently been done,
e.g., by calling
maximize or
minimize, the problem must be explicitly loaded using
loadprob.
5. The function returns immediately after passing the solution to the Optimizer. The solution is placed in a pool until the optimizer is able to analyze the solution during a MIP solve.
6. The
SOLNOTIFY callback function can be used to discover the outcome of a loaded solution, based on the identifier assigned to the solution (see
setcallback).
Related topics
Module
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