Hi everyone!!!
In need to know if it is possible to define one parameter with
different values. For example, I need to run my solve statement in a
loop with 4 iterations, however for each loop iteration, parameter “x”
must be initialized with different values. Furthermore, I need to
initialize in iteration 2, 3 and 4 some variables with the values
obtained in the previous ones. Can some one help me with that???
Regards
Sérgio
\
Hi Sergio
You can define your parameter over your set of iterations
set iter /iter1*iter4/;
parameter
myparameter(iter) Parameter that changes in each iteration;
myparameter(“iter1”) = 4;
etc.
Loop(iter,
Mymodelparameter = myparameter(iter);
Solve mymodel;
);
The other problem you can solve by defining a second parameter and change its value after the solve
Parameter
Myparameter2 Parameter that changes after solve;
Myparameter2 = 2;
Loop(iter,
Solve mymodel;
Renger
-----Original Message-----
From: gamsworld@googlegroups.com [mailto:gamsworld@googlegroups.com] On Behalf Of Sérgio
Sent: Monday, June 04, 2012 1:02 PM
To: gamsworld
Subject: Parameters values
Hi everyone!!!
In need to know if it is possible to define one parameter with different values. For example, I need to run my solve statement in a loop with 4 iterations, however for each loop iteration, parameter “x”
must be initialized with different values. Furthermore, I need to initialize in iteration 2, 3 and 4 some variables with the values obtained in the previous ones. Can some one help me with that???
Regards
Sérgio
–
To post to this group, send email to gamsworld@googlegroups.com.
To unsubscribe from this group, send email to gamsworld+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en.
\
Hi!!
Thanks for the reply. One more question please. What do you mean with Mymodelparameter = myparameter(iter); in the loop statement? Mymodelparameter is not defined anywhere.
cheers
Sérgio
2012/6/4 Renger van Nieuwkoop
Hi Sergio
You can define your parameter over your set of iterations
set iter /iter1*iter4/;
parameter
myparameter(iter) Parameter that changes in each iteration;
myparameter(“iter1”) = 4;
etc.
Loop(iter,
Mymodelparameter = myparameter(iter);
Solve mymodel;
);
The other problem you can solve by defining a second parameter and change its value after the solve
Parameter
Myparameter2 Parameter that changes after solve;
Myparameter2 = 2;
Loop(iter,
Solve mymodel;
Renger
-----Original Message-----
From: gamsworld@googlegroups.com [mailto:gamsworld@googlegroups.com] On Behalf Of Sérgio
Sent: Monday, June 04, 2012 1:02 PM
To: gamsworld
Subject: Parameters values
Hi everyone!!!
In need to know if it is possible to define one parameter with different values. For example, I need to run my solve statement in a loop with 4 iterations, however for each loop iteration, parameter “x”
must be initialized with different values. Furthermore, I need to initialize in iteration 2, 3 and 4 some variables with the values obtained in the previous ones. Can some one help me with that???
Regards
Sérgio
–
To post to this group, send email to gamsworld@googlegroups.com.
To unsubscribe from this group, send email to gamsworld+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en.
To post to this group, send email to gamsworld@googlegroups.com.
To unsubscribe from this group, send email to gamsworld+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en.
That would be the exogeneous parameter in your Model equations that changeant in the Loop. For example a tax Rate that is changed in every Loop and does not depend on the Model Solution.
Renger
Sent from my iPhone
Am 05.06.2012 um 12:28 schrieb “Sérgio Pereira” :
Hi!!
Thanks for the reply. One more question please. What do you mean with Mymodelparameter = myparameter(iter); in the loop statement? Mymodelparameter is not defined anywhere.
cheers
Sérgio
2012/6/4 Renger van Nieuwkoop
Hi Sergio You can define your parameter over your set of iterations set iter /iter1*iter4/; parameter myparameter(iter) Parameter that changes in each iteration; myparameter("iter1") = 4; etc. Loop(iter, Mymodelparameter = myparameter(iter); Solve mymodel; ); The other problem you can solve by defining a second parameter and change its value after the solve Parameter Myparameter2 Parameter that changes after solve; * Initialize the parameter for the first loop Myparameter2 = 2; Loop(iter, Solve mymodel; * Set the value of myparameter2 to the solution for the variable X Myparameter2 = X.L ); Cheers Renger -----Original Message----- From: <gamsworld@googlegroups.com> [mailto:<gamsworld@googlegroups.com>] On Behalf Of Sérgio Sent: Monday, June 04, 2012 1:02 PM To: gamsworld Subject: Parameters values Hi everyone!!! In need to know if it is possible to define one parameter with different values. For example, I need to run my solve statement in a loop with 4 iterations, however for each loop iteration, parameter "x" must be initialized with different values. Furthermore, I need to initialize in iteration 2, 3 and 4 some variables with the values obtained in the previous ones. Can some one help me with that??? Regards Sérgio -- To post to this group, send email to <gamsworld@googlegroups.com>. To unsubscribe from this group, send email to <gamsworld+unsubscribe@googlegroups.com>. For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en. -- To post to this group, send email to <gamsworld@googlegroups.com>. To unsubscribe from this group, send email to <gamsworld+unsubscribe@googlegroups.com>. For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en.–
To post to this group, send email to gamsworld@googlegroups.com.
To unsubscribe from this group, send email to gamsworld+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en.
–
To post to this group, send email to gamsworld@googlegroups.com.
To unsubscribe from this group, send email to gamsworld+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en.
I have write the code as you told me and it seems to work fine until model achieves iteration 32. After that algorithm stops without finding any solution reporting this:
AlphaECP: MIP solver failed, status 5
Do you know what it means?
Sérgio
2012/6/5 Renger van Nieuwkoop
That would be the exogeneous parameter in your Model equations that changeant in the Loop. For example a tax Rate that is changed in every Loop and does not depend on the Model Solution.
Renger
Sent from my iPhone
Am 05.06.2012 um 12:28 schrieb “Sérgio Pereira” :
Hi!! Thanks for the reply. One more question please. What do you mean with Mymodelparameter = myparameter(iter); in the loop statement? Mymodelparameter is not defined anywhere. cheers Sérgio 2012/6/4 Renger van Nieuwkoop Hi Sergio You can define your parameter over your set of iterations set iter /iter1*iter4/; parameter myparameter(iter) Parameter that changes in each iteration; myparameter("iter1") = 4; etc. Loop(iter, Mymodelparameter = myparameter(iter); Solve mymodel; ); The other problem you can solve by defining a second parameter and change its value after the solve Parameter Myparameter2 Parameter that changes after solve; * Initialize the parameter for the first loop Myparameter2 = 2; Loop(iter, Solve mymodel; * Set the value of myparameter2 to the solution for the variable X Myparameter2 = X.L ); Cheers Renger -----Original Message----- From: <gamsworld@googlegroups.com> [mailto:<gamsworld@googlegroups.com>] On Behalf Of Sérgio Sent: Monday, June 04, 2012 1:02 PM To: gamsworld Subject: Parameters values Hi everyone!!! In need to know if it is possible to define one parameter with different values. For example, I need to run my solve statement in a loop with 4 iterations, however for each loop iteration, parameter "x" must be initialized with different values. Furthermore, I need to initialize in iteration 2, 3 and 4 some variables with the values obtained in the previous ones. Can some one help me with that??? Regards Sérgio -- To post to this group, send email to <gamsworld@googlegroups.com>. To unsubscribe from this group, send email to <gamsworld+unsubscribe@googlegroups.com>. For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en. -- To post to this group, send email to <gamsworld@googlegroups.com>. To unsubscribe from this group, send email to <gamsworld+unsubscribe@googlegroups.com>. For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en. -- To post to this group, send email to <gamsworld@googlegroups.com>. To unsubscribe from this group, send email to <gamsworld+unsubscribe@googlegroups.com>. For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en.
To post to this group, send email to gamsworld@googlegroups.com.
To unsubscribe from this group, send email to gamsworld+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en.
Sorry, i am no expert in Mip
Renger
Sent from my iPhone
Am 05.06.2012 um 16:10 schrieb “Sérgio Pereira” :
I have write the code as you told me and it seems to work fine until model achieves iteration 32. After that algorithm stops without finding any solution reporting this:
AlphaECP: MIP solver failed, status 5
Do you know what it means?
Sérgio
2012/6/5 Renger van Nieuwkoop
That would be the exogeneous parameter in your Model equations that changeant in the Loop. For example a tax Rate that is changed in every Loop and does not depend on the Model Solution. Renger Sent from my iPhone Am 05.06.2012 um 12:28 schrieb "Sérgio Pereira" :Hi!! Thanks for the reply. One more question please. What do you mean with Mymodelparameter = myparameter(iter); in the loop statement? Mymodelparameter is not defined anywhere. cheers Sérgio 2012/6/4 Renger van Nieuwkoop Hi Sergio You can define your parameter over your set of iterations set iter /iter1*iter4/; parameter myparameter(iter) Parameter that changes in each iteration; myparameter("iter1") = 4; etc. Loop(iter, Mymodelparameter = myparameter(iter); Solve mymodel; ); The other problem you can solve by defining a second parameter and change its value after the solve Parameter Myparameter2 Parameter that changes after solve; * Initialize the parameter for the first loop Myparameter2 = 2; Loop(iter, Solve mymodel; * Set the value of myparameter2 to the solution for the variable X Myparameter2 = X.L ); Cheers Renger -----Original Message----- From: <gamsworld@googlegroups.com> [mailto:<gamsworld@googlegroups.com>] On Behalf Of Sérgio Sent: Monday, June 04, 2012 1:02 PM To: gamsworld Subject: Parameters values Hi everyone!!! In need to know if it is possible to define one parameter with different values. For example, I need to run my solve statement in a loop with 4 iterations, however for each loop iteration, parameter "x" must be initialized with different values. Furthermore, I need to initialize in iteration 2, 3 and 4 some variables with the values obtained in the previous ones. Can some one help me with that??? Regards Sérgio -- To post to this group, send email to <gamsworld@googlegroups.com>. To unsubscribe from this group, send email to <gamsworld+unsubscribe@googlegroups.com>. For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en. -- To post to this group, send email to <gamsworld@googlegroups.com>. To unsubscribe from this group, send email to <gamsworld+unsubscribe@googlegroups.com>. For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en. -- To post to this group, send email to <gamsworld@googlegroups.com>. To unsubscribe from this group, send email to <gamsworld+unsubscribe@googlegroups.com>. For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en.-- To post to this group, send email to <gamsworld@googlegroups.com>. To unsubscribe from this group, send email to <gamsworld+unsubscribe@googlegroups.com>. For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en.–
To post to this group, send email to gamsworld@googlegroups.com.
To unsubscribe from this group, send email to gamsworld+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en.
–
To post to this group, send email to gamsworld@googlegroups.com.
To unsubscribe from this group, send email to gamsworld+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en.
Thanks anyway!! You have already helped me a lot.
Sérgio
2012/6/5 Renger van Nieuwkoop
Sorry, i am no expert in Mip
Renger
Sent from my iPhone
Am 05.06.2012 um 16:10 schrieb “Sérgio Pereira” :
I have write the code as you told me and it seems to work fine until model achieves iteration 32. After that algorithm stops without finding any solution reporting this: AlphaECP: MIP solver failed, status 5 Do you know what it means? Sérgio 2012/6/5 Renger van Nieuwkoop That would be the exogeneous parameter in your Model equations that changeant in the Loop. For example a tax Rate that is changed in every Loop and does not depend on the Model Solution. Renger Sent from my iPhone Am 05.06.2012 um 12:28 schrieb "Sérgio Pereira" :Hi!! Thanks for the reply. One more question please. What do you mean with Mymodelparameter = myparameter(iter); in the loop statement? Mymodelparameter is not defined anywhere. cheers Sérgio 2012/6/4 Renger van Nieuwkoop Hi Sergio You can define your parameter over your set of iterations set iter /iter1*iter4/; parameter myparameter(iter) Parameter that changes in each iteration; myparameter("iter1") = 4; etc. Loop(iter, Mymodelparameter = myparameter(iter); Solve mymodel; ); The other problem you can solve by defining a second parameter and change its value after the solve Parameter Myparameter2 Parameter that changes after solve; * Initialize the parameter for the first loop Myparameter2 = 2; Loop(iter, Solve mymodel; * Set the value of myparameter2 to the solution for the variable X Myparameter2 = X.L ); Cheers Renger -----Original Message----- From: <gamsworld@googlegroups.com> [mailto:<gamsworld@googlegroups.com>] On Behalf Of Sérgio Sent: Monday, June 04, 2012 1:02 PM To: gamsworld Subject: Parameters values Hi everyone!!! In need to know if it is possible to define one parameter with different values. For example, I need to run my solve statement in a loop with 4 iterations, however for each loop iteration, parameter "x" must be initialized with different values. Furthermore, I need to initialize in iteration 2, 3 and 4 some variables with the values obtained in the previous ones. Can some one help me with that??? Regards Sérgio -- To post to this group, send email to <gamsworld@googlegroups.com>. To unsubscribe from this group, send email to <gamsworld+unsubscribe@googlegroups.com>. For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en. -- To post to this group, send email to <gamsworld@googlegroups.com>. To unsubscribe from this group, send email to <gamsworld+unsubscribe@googlegroups.com>. For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en. -- To post to this group, send email to <gamsworld@googlegroups.com>. To unsubscribe from this group, send email to <gamsworld+unsubscribe@googlegroups.com>. For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en.-- To post to this group, send email to <gamsworld@googlegroups.com>. To unsubscribe from this group, send email to <gamsworld+unsubscribe@googlegroups.com>. For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en. -- To post to this group, send email to <gamsworld@googlegroups.com>. To unsubscribe from this group, send email to <gamsworld+unsubscribe@googlegroups.com>. For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en.
To post to this group, send email to gamsworld@googlegroups.com.
To unsubscribe from this group, send email to gamsworld+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en.