Hello everyone!
The following three parameters are loaded from a GDX file, partly defined over the universal set (*).
parameter1(r,i,*,t)
parameter2(*,*,*,*,*,*,*)
parameter3(r,*,i,*,t)
Now, I want to omit some dimensions by summing over (*).
However, this doesn't work with GAMS.
Note that the universal sets (*) refer to different sets.
For parameter1(r,i,*,t) I found a solution by using the alias command (*,g) and then summing over the subset of g, i(g):
parameter11(r,i,t) = sum(i(g),parameter1(r,i,g,t));
Yet, this solution doesn't work anymore for parameter2 or parameter3, as they are defined over more than one universal set (*).
Do you have a suggestion how to solve this problem?
Thanks in advance!
Omitting dimensions
Re: Omitting dimensions
Hi hein,
Have a look here and especially at example 4: https://www.gams.com/latest/docs/UG_GDX.html
You might want to use something like: "$load setNo1<Parameter2.dim1" etc. to load the setelements from GDX.
Regards,
GFA
Have a look here and especially at example 4: https://www.gams.com/latest/docs/UG_GDX.html
You might want to use something like: "$load setNo1<Parameter2.dim1" etc. to load the setelements from GDX.
Regards,
GFA
Re: Omitting dimensions
Why not? Just make more aliases: alias(*,u1,u2,u3,u4,u5,u6,u7) and use the same technique as for parameter1.Yet, this solution doesn't work anymore for parameter2 or parameter3, as they are defined over more than one universal set (*).
-Michael
Re: Omitting dimensions
Thanks for the suggestions, GVA and Michael!
Both methods worked!
Both methods worked!