Azad
With your new definition you key decision is to define a single critical AV(a,b,c). You can only choose one and then this and the next two AV will be 1.
Try something like this
Binary variable AC(a,b,c) first AV that is nonzero for each a-b
AV(a,b,c) decision;
Equations ……
EqSum(a,b) … sum(c, AC(a,b,c)) =L= 1;
EQ0(a,b,c) … AV(a,b,c) =G= AC(a,b,c);
EQ1(a,b,c+1) … AV(a,b,c+1) =G= AC(a,b,c);
EQ2(a,b,c+2)… AV(a,b,c+2) =G= AC(a,b,c);
EQtot(a,b) … sum(c,AV(a,b,c) =L= 3*sum(c,AC(a,b,c));
\
Arne Stolbjerg Drud
ARKI Consulting & Development A/S
Bagsvaerdvej 246A, DK-2880 Bagsvaerd, Denmark
Phone: (+45) 44 49 03 23, email: adrud@arki.dk
From: gamsworld@googlegroups.com [mailto:gamsworld@googlegroups.com] On Behalf Of Azad
Sent: Tuesday, November 25, 2014 6:04 PM
To: gamsworld@googlegroups.com
Cc: adrud@arki.dk
Subject: Re: Defining an eqation
HI Aren tanks alot
but this EQAtion checck my binary variable at every “c” but i want it to be qualify for one time i mean just three of this variable should be equal to 1 respectively and others should be zero like that : 0 0 0 0 0 1 1 1 0 0 0
i define an another EQ in advance that allowances my variable to be 1 in just 3 time i just do not know how to set them respectively as i mention in above line.
thank you in advance
Best rearguards
On Monday, November 24, 2014 1:42:42 PM UTC+3:30, Arne Stolbjerg Drud wrote:
Hi Azad
First of all, you cannot have A refer to both a set and a variable.
Apart from that, I think you can use
EQ1(a,b,c+1)… AV(a,b,c+1) =G= AV(a,b,c);
EQ2(a,b,c+2)… AV(a,b,c+2) =G= AV(a,b,c);
Regards
Arne
\
Arne Stolbjerg Drud
ARKI Consulting & Development A/S
Bagsvaerdvej 246A, DK-2880 Bagsvaerd, Denmark
Phone: (+45) 44 49 03 23, email: ad…@arki.dk
From: gams...@googlegroups.com [mailto:gams...@googlegroups.com] On Behalf Of Azad
Sent: Saturday, November 22, 2014 1:58 PM
To: gams...@googlegroups.com
Subject: Defining an eqation
Hi
Dear all
I want to define an equation that : if binary variable named A(a,b,c) is 1 then A(a,b,c+1) and A(a,b,c+2) be equal to 1.
I mean :
EQ(a,b,c)… A(a,b,c)+A(a,b,(c+1) ) + A(a,b,(c+2) ) =3 ;
and C is a set /1*24/
But when i write my code as above error 145 happens!
how should i write this equation ??
thanks you in advance
Regards
AZAD
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