Originally posted by: SystemAdmin

[agus said:]

Hi I have a problem in setting the filtering condition for a constraint.
Here is my problem:


{int} Nodes = {1,2};
tuple flight {
key string flightID;
{int} runwayEntrance;
};
{flight} Flights = {<",{1}>, <",{1}>, <",{2}>};
dvar int+ x[Flights][Nodes] in 0..1;


From the above situation, I am trying to produce the following constraints:
      (i) X[f1][1] + x[f2][1] == 1
      (ii) X[f3][2] == 1

I tried the following:

forall(u in Nodes)
sum(i in Flights) x[i][u] == 1;


But this is what I got:
      (i) X[f1][1] + x[f2][1] + x[f3][1] == 1
      (ii) X[f1][2] + x[f2][2] + X[f3][2] == 1

Could someone help me with this?

Thanks

Agus


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Originally posted by: SystemAdmin

[jin82873053 said:]

maybe you can just write your constraints in st.
your constraints:(i)   X[f1][1] + x[f2][1] == 1
                       (ii)   X[f3][2] == 1
write to code

subject to{

  ct1:  X[f1][1] + x[f2][1] == 1;
  ct2:  X[f3][2] == 1;
}


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#OPLusingCPLEXOptimizer

Originally posted by: SystemAdmin

[afleischer said:]

Hi,

I would rewrite your constraint into


subject to
{
forall(u in Nodes)
sum(i in Flights:u in i.runwayEntrance) x[i][u] == 1;
}


Alex
#DecisionOptimization
#OPLusingCPLEXOptimizer