Originally posted by: qtbgo

Hi, I want to define an integer dvar array like a[i][j], where i in 1..10 and j in 1..2i.
Here j depends on i.

How to define this a[i][j] in opl?

thanks very much.
sorry for my english and hopr you understand me.
#DecisionOptimization
#OPLusingCPLEXOptimizer

Originally posted by: SystemAdmin

execute
{
for(i in 1..10)
for(j in 1..2*i)
a[i][j] = i*j;
}
#DecisionOptimization
#OPLusingCPLEXOptimizer

Hi

it is not possible to have a variable size decision variable array.
But it is possible to use tuples to do that.
Let me give you an example.

tuple t
{
 int x;
 int y; 
}  
 
{t} s={<i,j> | i in 1..10,j in 1..2*10: j<=2*i};
 
dvar int a[s];

Alex
#DecisionOptimization
#OPLusingCPLEXOptimizer