creation of scenarios

GAMS
1

Dear experts,
I want to create a series of scenarios with loop statement, code is shown as follows, but it doesn’t work. For each iteration, the status of connection is changed to 0 and the corresponding connection is taken off. In the next iteration, the last connection/status is resumed and a new connection is taken off. The problem has baffled me for a while, thank you if you could offer some advice.
Best regards,
Linstro

set i node /15/ ;
alias (i,j),(i,k),(i,t) ;
Table statu(i,j,)
status
1.2 1
1.3 1
2.3 1
2.4 1
3.5 1 ;
set connection(i,j) /
1.2
1.3
2.3
2.4
3.5/;

parameter status(i,j);
status(i,j)=statu(i,j,“status”);
set newconnec(i,j);

loop((k,t)connection(k,t), status(k,t)=0; newconnec(i,j)(connection(i,j) and status(i,j) gt 0)=yes;

option newconnec:3:0:2;
display newconnec;
*resume the connection status
status(k,t)=1;
);

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2

Dear linstro

Hi, suppose that I have 1000 scenarios originally with probability 0.001 for each scenario, and it is 24 dimension for each scenario.
If I only want 20 scenarios preserved, what is the simplest way? I saw many people use GAMS to do this, but I am wondering if there is some code in CPLEX.

The 1000 scenarios are in the attachment.

Thank you very much.

Regards
MEHRDAD

On Thursday, 11 April 2013 01:31:41 UTC+8, Linstro Forren wrote:

Dear experts,
I want to create a series of scenarios with loop statement, code is shown as follows, but it doesn’t work. For each iteration, the status of connection is changed to 0 and the corresponding connection is taken off. In the next iteration, the last connection/status is resumed and a new connection is taken off. The problem has baffled me for a while, thank you if you could offer some advice.
Best regards,
Linstro

set i node /15/ ;
alias (i,j),(i,k),(i,t) ;
Table statu(i,j,)
status
1.2 1
1.3 1
2.3 1
2.4 1
3.5 1 ;
set connection(i,j) /
1.2
1.3
2.3
2.4
3.5/;

parameter status(i,j);
status(i,j)=statu(i,j,“status”);
set newconnec(i,j);

loop((k,t)connection(k,t), status(k,t)=0; newconnec(i,j)(connection(i,j) and status(i,j) gt 0)=yes;

option newconnec:3:0:2;
display newconnec;
*resume the connection status
status(k,t)=1;
);

–
original_wind_scenarios.xls (1.29 MB)