Hi,
i would like to make a sum statement that includes all items from from a set, but not the one at the current iteration.
Let me demonstrate:
10
9
8
equations should be:
muBB(1) = 9 + 8;
muBB(2) = 10 + 8;
muBB(3) = 9 + 8;
i am trying to implement this in the following equation: (x(ii) is my objective variable… it is unknown, so i cant predefine any sets)
muBB(i)… OS(i) =e= sum(ii , (OA(ii) * alpha * (1-C(ii))) * x(ii));
My ideas:
alias (i, ii)
muBB(i)… OS(i) =e= sum(ii $ not i, (OA(ii) * alpha * (1-C(ii))) * x(ii));
Maybe with if then statements… i dont know how to do it, please help.
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Hi, this is done in gams with the following:
muBB(i)… OS(i) =e= sum(ii $(ord(i) ne ord(ii)), (OA(ii) * alpha * (1-C(ii))) * x(ii));
regards
Claudio
On Mon, May 6, 2013 at 7:46 PM, wrote:
Hi,
i would like to make a sum statement that includes all items from from a set, but not the one at the current iteration.
Let me demonstrate:
10
9
8
equations should be:
muBB(1) = 9 + 8;
muBB(2) = 10 + 8;
muBB(3) = 9 + 8;
i am trying to implement this in the following equation: (x(ii) is my objective variable… it is unknown, so i cant predefine any sets)
muBB(i)… OS(i) =e= sum(ii , (OA(ii) * alpha * (1-C(ii))) * x(ii));
My ideas:
alias (i, ii)
muBB(i)… OS(i) =e= sum(ii $ not i, (OA(ii) * alpha * (1-C(ii))) * x(ii));
Maybe with if then statements… i dont know how to do it, please help.
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Thank you so much,
worked perfectly.
On Tuesday, May 7, 2013 6:15:19 PM UTC+2, Claudio Delpino wrote:
Hi, this is done in gams with the following:
muBB(i)… OS(i) =e= sum(ii $(ord(i) ne ord(ii)), (OA(ii) * alpha * (1-C(ii))) * x(ii));
regards
Claudio
On Mon, May 6, 2013 at 7:46 PM, wrote:
Hi,
i would like to make a sum statement that includes all items from from a set, but not the one at the current iteration.
Let me demonstrate:
10
9
8
equations should be:
muBB(1) = 9 + 8;
muBB(2) = 10 + 8;
muBB(3) = 9 + 8;
i am trying to implement this in the following equation: (x(ii) is my objective variable… it is unknown, so i cant predefine any sets)
muBB(i)… OS(i) =e= sum(ii , (OA(ii) * alpha * (1-C(ii))) * x(ii));
My ideas:
alias (i, ii)
muBB(i)… OS(i) =e= sum(ii $ not i, (OA(ii) * alpha * (1-C(ii))) * x(ii));
Maybe with if then statements… i dont know how to do it, please help.
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