Hello everybody,
I need to write an equation for my model.
I m trying to write T(i) > T(i-1) for every i .
T is decision variable and i is index for T variable.
i is a set which includes 1,2,3,...,N. N is very big integer.
Can you help me please?
Thanks a lot.
Index change for constraints
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- User
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- Location: Rosario - Argentina
Re: Index change for constraints
Hi, Is T a binary or continuous variable?
Is "T(i)" greater (>) or greater than or equal (>=) than "T(i-1)" ?
Bye
Is "T(i)" greater (>) or greater than or equal (>=) than "T(i-1)" ?
Bye
Re: Index change for constraints
Hi,
T is continuous and positive variable.
Constraint has equality.
In gams code is like " eq(i).. T(i) =g= T(i-1)"
However for the i-1 case it can not run.
Thanks.
T is continuous and positive variable.
Constraint has equality.
In gams code is like " eq(i).. T(i) =g= T(i-1)"
However for the i-1 case it can not run.
Thanks.
-
- User
- Posts: 118
- Joined: 7 years ago
- Location: Rosario - Argentina
Re: Index change for constraints
Ok, you must start with the second value of i
eq(i)$(ord(i) ge 2).. T(i) =g= T(i-1);
Bye!
eq(i)$(ord(i) ge 2).. T(i) =g= T(i-1);
Bye!
Re: Index change for constraints
That is worked. Thanks a lot