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Decision Optimization CPLEX & For Watson Studio

Showing 99

Interface between CPLEX and FORTRAN

Since FORTRAN is one of the TOP20 programming languages in the TIOBE index (https://www.tiobe.com/tiobe-index/), I suggest that IBM create mixed-integer linear programming models with CPLEX and FORTRAN. I have not found a library similar to Conce...
3 months ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 0 Not under consideration

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...
about 1 year ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 1 Future consideration

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
12 months ago in Decision Optimization CPLEX & For Watson Studio 0 Future consideration

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....
12 months ago in Decision Optimization CPLEX & For Watson Studio 0 Future consideration

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.
12 months ago in Decision Optimization CPLEX & For Watson Studio 0 Future consideration

CPLEX object create by oplrun and concert shall be equal

the CPLEX object created by an OPL model is not the same as tyhe CPLEX object created with concert technology.It creates limitation and complexity that prevent people to use OPL in many cases, such advance algorithms with call backs manual cuts......
12 months ago in Decision Optimization CPLEX & For Watson Studio 0 Future consideration

C-like printf function for OPL Script

Need a nice fct for displaying floats ? like printf('%.2f') . identation. number of decimals. for string as well. for arrays as well
12 months ago in Decision Optimization CPLEX & For Watson Studio 0 Not under consideration

In CPLEX studio; display DOcplexCloud solve as local solve

In the IDE (CPLEX studio), with a solve on DOcplexCloud is not display the same way as a local solve.That create lots of extra work to explore the input data, the constraint expressed and the result.
12 months ago in Decision Optimization CPLEX & For Watson Studio 0 Not under consideration

Information callback procedure for Benders algorithm

For MIP problems using branch-and-bound the CPLEX API offers the info or MIP callback procedure which can be used to retrieve information during a MIP search. For the Benders algorithm these callback procedures do not work (CPLEX 12.7 throws an er...
12 months ago in Decision Optimization CPLEX & For Watson Studio 0 Planned for future release

Have a regenerate option in OPL flow control

Have a way to call regenerate a model when you change some data in scripting without the need to build from zero the model out of the model and the data.
12 months ago in Decision Optimization CPLEX & For Watson Studio 0 Future consideration