hi i need to use variable Pm(m,MEG,t) in a equation condition term as illustrated bellow, however, it is not possible to use a variable in a equations condition. i wonder if there is any solution or trick for this problem.
parameter
numb(m)
G(m,n)
PDGmax(m)
;
binary variable
zz(m,t)
;
variable
Pm(m,MEG,t)
;
e18(m,t)$(PDGmax(m) ne 0 or Pm(m,MEG,t) ne 0 ).. zz(m,t)=e=1;
e19(m,t)$(PDGmax(m) eq 0 and Pm(m,MEG,t) eq 0 ).. sum(n$(ord(m) ne ord(n) and G(m,n) ne 0),delta(m,n,t))/numb(m)=l=zz(m,t);
e20(m,t)$(PDGmax(m) eq 0 and Pm(m,MEG,t) eq 0) .. sum(n$(ord(m) ne ord(n) and G(m,n) ne 0),delta(m,n,t))=g=zz(m,t);
Using a variable in a equations condition
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Re: Using a variable in a equations condition
Hi,
You can use the indicator constraint to achieve what you want for the variable condition in equations.
And I just posted a question post here. If someone answers my post, I think you will be able to implement the indicator constraint through my small example!
Cheers,
Gabriel
You can use the indicator constraint to achieve what you want for the variable condition in equations.
And I just posted a question post here. If someone answers my post, I think you will be able to implement the indicator constraint through my small example!
Cheers,
Gabriel
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Re: Using a variable in a equations condition
Hello, I suggest you make a manually "big M" or convex hull reformulation or try with the indicator constraint. Best!
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Re: Using a variable in a equations condition
HiGabrielYin wrote: ↑1 year ago Hi,
You can use the indicator constraint to achieve what you want for the variable condition in equations.
And I just posted a question post here. If someone answers my post, I think you will be able to implement the indicator constraint through my small example!
Cheers,
Gabriel
Thanks for your help.
Saeid
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Re: Using a variable in a equations condition
HiManassaldi wrote: ↑1 year ago Hello, I suggest you make a manually "big M" or convex hull reformulation or try with the indicator constraint. Best!
I have aleready tested big M but it didnt work.
Thanks for your help.
Saeid