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parag_patil
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save variables as parameters

Post by parag_patil » 2 months ago

Dear all,
My problem setting is as follows:

1. I have set of linear equations, the variables obtained after solving these are X1,X2...,Xn and Y1,Y2...,Yn.
2. Once the above variables are obtained, these are required as parameters in the rest of the problem.

Can you please tell me how to do it?

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dirkse
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Re: save variables as parameters

Post by dirkse » 2 months ago

Parag,

The variables levels are available after the solve using the .L attribute, e.g.

Code: Select all

set i / 1 * 3 /;
variable x(i);
* I don't list it here, but imagine some code to solve a model and by doing so setting the variable levels for x
* now x.L(i) is available, just like a parameter.
parameter c(i), v(i);
c(i) = x.L(i);
v(i) = ord(i) / [x.L(i) + 2];
Using the variable levels like this is fundamental stuff. It is described in the Rosenthal tutorial (just digest the whole tutorial, it is not wasted time) and in more detail in the chapter on variables.

https://www.gams.com/latest/docs/UG_Tutorial.html
https://www.gams.com/latest/docs/UG_Variables.html

-Steve

parag_patil
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Re: save variables as parameters

Post by parag_patil » 2 months ago

Hi,

Thank you for your reply.

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