Dear all,
I have a constraint in AIMMS which is as follows:
lambda1(q)*0+lambda2(q)*mu1+lambda3(q)*mu2+lambda4(q)=
1/T(q)*sum[k,sum[l,i(k,l,q)*min(travelTimes(k,l),tau)]]k in LocationOnRouteQ(q) and l in LocationOnRouteQAfterK(k,q)
The problem is in this part:
k in LocationOnRouteQ(q) and l in LocationOnRouteQAfterK(k,q)
Because I get an error that the scope of index k has not been specified. However, when I put the indices k and l in the index domain I get the error that the scope already has been specified. I want to let the k come out of the set LocationOnRouteQ(q) and l out of subset LocationOnRouteQAfterK(k,q) and I have tried many things, but none worked out.
LocationOnRouteQ(q) and LocationOnRouteQAfterK(k,q) are both subsets of the set Locations and I got k and l as indices in the set Location.
I hope someone can help me.
Kind regards,
AimÃ©e
Page 1 / 1
Not sure but what if you add more indices (m, n, o) to the set location?
And then ...
+lambda1(q)*0
+lambda2(q)*mu1
+lambda3(q)*mu2
+lambda4(q)
=
1/T(q)*sum[k,sum[l,i(k,l,q)*min(travelTimes(k,l),tau)]]

m in LocationOnRouteQ(q)
and n in LocationOnRouteQAfterK(o,q)
Not sure of this is exactly the right solution, but I think introducing more indices is the key to your solution.
And then ...
+lambda1(q)*0
+lambda2(q)*mu1
+lambda3(q)*mu2
+lambda4(q)
=
1/T(q)*sum[k,sum[l,i(k,l,q)*min(travelTimes(k,l),tau)]]

m in LocationOnRouteQ(q)
and n in LocationOnRouteQAfterK(o,q)
Not sure of this is exactly the right solution, but I think introducing more indices is the key to your solution.
Hi Aimee,
You should probably move the condition into the sum. Meaning that the index k only 'lives' inside the scope to the sum.
Is this a good formulation for you?
1/T(q)
*
sum[k k in LocationOnRouteQ(q),
sum[l  l in LocationOnRouteQAfterK(k,q),
i(k,l,q)*min(travelTimes(k,l),tau)
]
]
or equivalently,
1/T(q)
*
sum[ (k,l) k in LocationOnRouteQ(q) and l in LocationOnRouteQAfterK(k,q),
i(k,l,q)*min(travelTimes(k,l),tau)
]
You should probably move the condition into the sum. Meaning that the index k only 'lives' inside the scope to the sum.
Is this a good formulation for you?
1/T(q)
*
sum[k k in LocationOnRouteQ(q),
sum[l  l in LocationOnRouteQAfterK(k,q),
i(k,l,q)*min(travelTimes(k,l),tau)
]
]
or equivalently,
1/T(q)
*
sum[ (k,l) k in LocationOnRouteQ(q) and l in LocationOnRouteQAfterK(k,q),
i(k,l,q)*min(travelTimes(k,l),tau)
]
This helped me ! Thank you so much both
Sign up
Already have an account? Login
Please use your business or academic email address to register
Login to the community
No account yet? Create an account
Enter your Email address. We'll send you an email with instructions to reset your password.