7
votes
Accepted
Book recommendations on OPL
There are many useful references that can be found by googling. In the following you can find some of them:
IBM ILOG CPLEX Optimization Studio OPL Language User’s Manual
Introduction to Computational ...
- 7,644
6
votes
Operator error in operating cost model constraint
Integer programming models solved by CPLEX (or most other solvers) require linear or, in certain very limited cases, quadratic constraints. Your constraint 9 involves dividing a parameter (...
- 36.4k
4
votes
Accepted
Why some decision variables don't get values in Cplex?
your model is not feasible and that is why you get no solution.
if you comment
...
- 3,982
4
votes
Accepted
How define variable in CPLEX and What is diffrence between decision variables and variable in CPLEX
as can be read in OPL CPLEX documentation, A decision variable is an unknown in an optimization problem.
For instance
dvar int x in 0..10;
is a decision variable
<...
- 3,982
4
votes
Book recommendations on OPL
I recommand the Model Building Book by Williams and here you may see the examples in OPL.
Let me add some OPL links:
How to with OPL ?
Tips and tricks
OPL Scripting
OPL and Excel
Making ...
- 3,982
4
votes
Book recommendations on OPL
There is a rather helpful list of educational resources specific to IBM Decision Optimization products here. If you scroll down a bit, you will find links to some YouTube videos about optimization ...
- 36.4k
3
votes
Accepted
CPLEX oplrun says the problem size has exceeded, but then proceeds to solve the problem anyway
Indeed even for models that are small enough like knapsack you get the message
IBM ILOG CPLEX Optimization Studio Community Edition. The CPLEX
Optimizers will solve problems up to 1000 variables and ...
- 3,982
3
votes
Book recommendations on OPL
Here is a book that Pete Cacioppi wrote to teach OPL and optimization as it relates to network design models. It was meant for beginners. It uses a network design problem as the example, but you don't ...
- 811
2
votes
Accepted
2
votes
Accepted
Get array of sequences for array of interval arrays in OPL
in the sched_sequence example in OPL CPLEX you have an example of array of sequences:
...
- 3,982
1
vote
Array of string in OPL
.mod
{string} cluster=...;
string darkstore [cluster][1..4]=...;
string demandpoint [cluster][1..4]=...;
.dat
...
- 3,982
1
vote
Tuples OPL in VRP
in How to with OPL I shared a few TSP starting points.
TSP with remove circuits is an easy one.
.mod
...
- 3,982
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