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Decision Optimization CPLEX & For Watson Studio

Showing 60

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

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

"If and only if" for indicator-constraints in MATLAB API

We use the CPLEX for MATLAB API to solve a MILP. In our case the bottleneck of the API is the limited functionality of indicator constraints. Whereas in OPL and the Java API an "if and only if" statement is possible, this functionality is missing ...
12 months ago in Decision Optimization CPLEX & For Watson Studio 0 Future consideration

Nonlinear solver for CPLEX

Add nonlinear optimization capability to CPLEX. Many real-life models are nonlinear by nature. CPLEX solver requires a linear model to work. A good nonlinear solver can often times overperform a linearized form of a real-life model. Having a nonli...
over 3 years ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 1 Future consideration

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 a[F...
12 months ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 0 Future consideration

Constraint filtering in the problem browser

when you review the expression of the constraint from the problem browser, to see what constraint has been written from your code.the view allows to filter to some variables, order the display can be changed and display only the constraint that ar...
12 months ago in Decision Optimization CPLEX & For Watson Studio 0 Future consideration