Decision Optimization CPLEX & For Watson Studio

Showing 93

OPL function to assign a initial value or fix te value to a variable

The only way to do a warm start is by using OPL script.it should be possible in the variable declaration to give a start value. the same way if you want to fix a variable to a value you need to 2 lines of code to fix the upper and lower bounds... ...

over 2 years ago in Decision Optimization CPLEX & For Watson Studio 0 Future consideration

5 VOTE

graphical dash board of the search console/log

have graph to represent the node through-put, number of active node, memory consumed, CPUs usage

over 2 years ago in Decision Optimization CPLEX & For Watson Studio 0 Not under consideration

5 VOTE

Dantzig-Wolf-decomposition with CPLEX

Extend the CPLEX-API to let reformulate a problem by CPLEX, notably a problem - which could be solved efficiently by a DW-decomposition. It should be reformulated by CPLEX to a problem (its dual) which could be solved by CPLEX's benders algorithm....

over 2 years ago in Decision Optimization CPLEX & For Watson Studio 0 Future consideration

4 VOTE

Enhance .NET API for maps

When attempting to use the reflection mechanism of OPL CPLEX API under .NET (version 12.9 but same problem seen in documentation of latest version), I stumble upon an error on my first implementation of a missing method "NbDim" for the map class "...

about 2 years ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 0 Future consideration

5 VOTE

CPLEX: Make adding mulitple objectives consistent with adding one objective

In the Java API for CPLEX (presumably similar in other APIs), it is possible to create an objective and add it to a model in one function call, using overloads of IloCplexModeler.addMinimize() and .addMaximize() that take an IloNumExpr argument. D...

over 2 years ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 1 Future consideration

7 VOTE

OPL Lazy Constraint Pool

At http://www-01.ibm.com/support/docview.wss?uid=swg21681643, it is indicated that it is not possible to add lazy constraints in OPL Script. I know OPL is not a programming language, but it is quite important to be able to add lazy constraints in ...

about 4 years ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 1 Future consideration

4 VOTE

Allow initialisation using OPL of arrays within tuple sets

In OPL it is not possible to initialise an array which is within a set of tuples either through values or programmatically. An enhancement should be made to OPL to allow this. Consider: {string} Factors = {"a","b","c"}; tuple T_2 { key int i; int ...

over 2 years ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 0 Future consideration

4 VOTE

Have atoi and itoa in OPL

Today in OPL, ftoi is quite useful to convert float to int.What would help is to do conversions between int and string in order to be able to process strings as inputs or compute inputs. What we miss is atoi and itoa

over 2 years ago in Decision Optimization CPLEX & For Watson Studio 0 Future consideration

4 VOTE

Add Java perspective in the CPLEX Studio (IDE)

As in DOC, CPLEX studio should have a perspective with Java.In the install the IDE should be ready to use CPLEX, CPO, OPL and install the Java SDK....It would make so much sense to have everything ready in one IDE OPL Java (with cplex.jar, cp.jar....

over 2 years ago in Decision Optimization CPLEX & For Watson Studio 0 Future consideration

4 VOTE

Have a line number in OPL out of bounds errors

int E[i in 1..2]=2; int n=3; dvar int x[1..2] in 0..10; subject to { E[2] >=x[3]; x[1]<=2; } execute { writeln("ok") ; } gives an error but without line number. This is easy but in bigger models, it takes a lot of time to spot line numbers.

over 2 years ago in Decision Optimization CPLEX & For Watson Studio 0 Future consideration

Please enter your email address

FILTER BY CATEGORY