GAMS World Forum

Thanks very much for your help!

Luca

Dear all, I am programming in GAMS using CPLEX as MIP solver. I activated the following options for CPLEX feasopt 1 numericalemphasis 1 scaind 1 CPLEX should provide the "less infeasible" solution to the problem. However I obtain the following error: Feasible solution. ------------------------------...

Dear all,
I would like to implement principal component analysis in GAMS. I would ask you if there are linear algebra facilities in GAMS (such as tools to compute eigenvalues...) or there are libraries already available for PCA in GAMS.

Thanks very much for your help. Best regards,
Luca

Thanks very much. Now it works.
Best regards,
Luca

Dear all users,

I am using GAMS to solve an optimisation problem and I am printing the results to an excel sheet. I wold ask you if there is a way to print in excel all the entries of a variable included the zero entries.

Thanks in advance. Best regards,
Luca

Thanks for the answer. I have already check the difference between fsSOL matrix and apparently all is ok.
But, when I solve the problems (which apparently are the same), I obtain different solutions.
-- Luca

Here there is the code. I have a master problem, PROBLEM1, whose constraints are dynamically added by solving PROBLEM2. The syntax is correct, but the code has a strange behaviour (I am not sure I use the dynamic set in the right way). Thanks very much for all your suggestions.

Thanks very much for your answer. It is true that I have different value for the parameters, but the second equations are just the copy-paste of one of the equation in the first set. I have all the equation I need in the first group of constraints, while in the second one I have always a constraint ...

Dear all, I am implementing a kind of branch and cut in GAMS and I have the following problem. I have a simple problem with just two nonnegative constaints in my model: set p auxiliary superset /1*200/ ; set i another set /1*100/ variables w(j,m) ; parameters fs1(j,i), fs2(j,p) ; equations contraint...

Now it is ok. It was my fault.

Sorry,
Luca