gams:i_know_a_better_solution
Differences
This shows you the differences between two versions of the page.
| — |
gams:i_know_a_better_solution [2008/10/24 14:56] (current) support created |
||
|---|---|---|---|
| Line 1: | Line 1: | ||
| + | ====== I know a better solution ====== | ||
| + | Sometimes users send us a model with the statement: the solver found a solution ''x'' with objective value ''z'', but I know a better solution y which has objective value ''z*''. The solver can sometimes help checking such a conjecture by fixing the variables to the proposed solution, and see if this causes any infeasibilities: | ||
| + | |||
| + | <code> | ||
| + | * enter data for proposed solution | ||
| + | PARAMETER P(I) proposed solution / | ||
| + | i1 1.0 | ||
| + | i2 2.0 | ||
| + | i3 3.0 | ||
| + | /; | ||
| + | |||
| + | * fix variables | ||
| + | X.FX(I) = P(I); | ||
| + | |||
| + | * and let solver check if this is a feasible solution | ||
| + | SOLVE M USING MIP MINIMIZING Z; | ||
| + | </code> | ||
IMPRESSUM / LEGAL NOTICE
PRIVACY POLICY
gams/i_know_a_better_solution.txt ยท Last modified: 2008/10/24 14:56 by support
Page Tools
Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Noncommercial-Share Alike 4.0 International
