Dear all,
I am using BARON + GAMS to solve a MINLP problem. I would like to stop the solver if the objective function does not change for a given interval of time or number of iterations. How can I do?
Thanks very much. Best,
Luca
Search found 23 matches
- 4 years ago
- Forum: Solvers
- Topic: Solver stop conditions
- Replies: 1
- Views: 2739
- 5 years ago
- Forum: Syntax
- Topic: retrieve the lower bound
- Replies: 1
- Views: 1987
retrieve the lower bound
Dear all,
I am solving a model with baron through gams. I would like to retrieve the lower bound and the upper bound of the objective function obj.
There is a variable where the LB is saved: I image that obj.l return the upper bound.
Thanks in advance. Best regards,
Luca
I am solving a model with baron through gams. I would like to retrieve the lower bound and the upper bound of the objective function obj.
There is a variable where the LB is saved: I image that obj.l return the upper bound.
Thanks in advance. Best regards,
Luca
- 5 years ago
- Forum: Syntax
- Topic: Matrix multiplication in GAMS
- Replies: 1
- Views: 4055
Matrix multiplication in GAMS
Dear all,
what is the best way to multiply two matrix in GAMS?
Thanks for all your answer,
Luca
what is the best way to multiply two matrix in GAMS?
Thanks for all your answer,
Luca
- 5 years ago
- Forum: Syntax
- Topic: GAMS CPU time
- Replies: 4
- Views: 4182
Re: GAMS CPU time
usually I test code with single thread and I report this CPU time.
otherwise what you suggest to do ?
Thanks,
Luca
otherwise what you suggest to do ?
Thanks,
Luca
- 5 years ago
- Forum: Syntax
- Topic: GAMS CPU time
- Replies: 4
- Views: 4182
GAMS CPU time
Dear all,
I know in gams the elapsed time can be retrive by the couple of instructions:
scalar starttime; starttime = jnow;
....
scalar elapsed; elapsed = (jnow - starttime)*24*3600; display elapsed;
but how can i retrive the cpu time spent in gams by my code?
Thanks in advance,
Luca
I know in gams the elapsed time can be retrive by the couple of instructions:
scalar starttime; starttime = jnow;
....
scalar elapsed; elapsed = (jnow - starttime)*24*3600; display elapsed;
but how can i retrive the cpu time spent in gams by my code?
Thanks in advance,
Luca
- 5 years ago
- Forum: Tools
- Topic: Gams and eigenvectors
- Replies: 2
- Views: 3284
Re: Gams and eigenvectors
thanks very much. I will do the exercise
- 5 years ago
- Forum: Tools
- Topic: Gams and eigenvectors
- Replies: 2
- Views: 3284
Gams and eigenvectors
Dear all,
I am using the tool eigenvector.exe to compute the eigenvector of a matrix.
Gams return a matrix with the eigenvectors. Just one question: the eigenvector are the row or the column of that matrix?
Thanks very much. Best regards,
Luca
I am using the tool eigenvector.exe to compute the eigenvector of a matrix.
Gams return a matrix with the eigenvectors. Just one question: the eigenvector are the row or the column of that matrix?
Thanks very much. Best regards,
Luca
- 5 years ago
- Forum: Solvers
- Topic: Infeasibilities in CPLEX
- Replies: 2
- Views: 5556
Re: Infeasibilities in CPLEX
Thanks very much for your help!
Luca
Luca
- 5 years ago
- Forum: Solvers
- Topic: Infeasibilities in CPLEX
- Replies: 2
- Views: 5556
Infeasibilities in CPLEX
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. --------------------...
- 5 years ago
- Forum: Modeling
- Topic: Principal component analysis in GAMS
- Replies: 1
- Views: 3429
Principal component analysis in GAMS
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
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