Hi,
I am working in power distribution side. In my GAMS code , I have multiply cost with PRESENT WORTH FACTOR [1/((1+r)**Y)] , where r=0.03 and "Y" is number of years. Now I want my GAMS code to print value for 5 years . It is like this..
COST(Y)*[1/((1+r)**Y)] . I can not get incremental value for every year and display it for every year.
Can anybody help me in this loop
Loop
Re: Loop
Hi
It is not completely clear what you want (it is better to add some code you have already available).
Here some code to get every fifth element of a y as a subset by defining a subset y5(y). You define this dynamic set without assigning any values of y to it. This is done using the $operator and the mod function:
Cheers
Renger
It is not completely clear what you want (it is better to add some code you have already available).
Here some code to get every fifth element of a y as a subset by defining a subset y5(y). You define this dynamic set without assigning any values of y to it. This is done using the $operator and the mod function:
Code: Select all
set y years /2015*2050/
y5(y) every fifth year;
y5(y)$(mod(ord(y)  1,5)=0) = YES;
display y5;
Renger

 User
 Posts: 2
 Joined: 8 months ago
Re: Loop
Hi,
Thank you very much for your reply Sir,
My Code is like this
eq3.. Netcost=e=(costAC+costDC);
eq4.. PW=e=1/(1+r)**y;
eq5.. CostY1=e=Netcost*PW;
eq6.. CostY2=e=CostY1*PW;
eq7.. CostY3=e=CostY2*PW;
I want to make a loop that will increment year (y) value and calculate cost for the next year and then display it, A loop that give me Cost for each year from Y1 to Y5,
Thanks
Thank you very much for your reply Sir,
My Code is like this
eq3.. Netcost=e=(costAC+costDC);
eq4.. PW=e=1/(1+r)**y;
eq5.. CostY1=e=Netcost*PW;
eq6.. CostY2=e=CostY1*PW;
eq7.. CostY3=e=CostY2*PW;
I want to make a loop that will increment year (y) value and calculate cost for the next year and then display it, A loop that give me Cost for each year from Y1 to Y5,
Thanks
Re: Loop
Hi
If you want to loop over y, you should have indexed parameters, variables and equations. I think you should first sit down and derive mathematically what you want to do and then start from there: write down your model with model definition, solve statement, and have a good look at how to write indexed parameters, variables and equations.
CHeers
Renger
If you want to loop over y, you should have indexed parameters, variables and equations. I think you should first sit down and derive mathematically what you want to do and then start from there: write down your model with model definition, solve statement, and have a good look at how to write indexed parameters, variables and equations.
CHeers
Renger