Help with error $ 125
Help with error $ 125
I am trying to make a subset and find out the sum of elements in the
subset. However, I am getting error $125 pl help if you can. my code
as below-:
Set
I 'number of products' / 1*3 /
F(I) 'products of firm 2' /2, 3/;
alias (I,J);
Table Data(I, *) 'Marginal cost Data'
C
1 2
2 2
3 2 ;
Parameter C(I) 'Marginal Cost of each firms' ;
C(I)= Data(I,'C');
Positive variables q(I) 'production vector'
M(F) 'production vector for firm 2' ;
Variables P 'price' ;
Equations
dNegprofit(I) 'differentiation of negative profit, d(-profit)/
dq: dTC - p - q(I)*dp'
Defp 'Demand function'
TQ(I) 'total quantity for firm 2';
dnegprofit(I)..
C(I) - P + q(I) =g= 0 ;
Defp..P =e= 10-Sum(J, q(J));
TQ(F).. M(F) =e= Sum(F, q(F)); (The error results in this statement)
Model Cournot /dnegprofit.q, defp.p, TQ/;
Solve cournot using mcp ;
--~--~---------~--~----~------------~-------~--~----~
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
-~----------~----~----~----~------~----~------~--~---
RE: Help with error $ 125
Hi
You are trying to sum over F, but F (as Gams told) you is already under
control, meaning in this case:
- that you defined this equation over F (so there is an equation for every
element of F)
- and you sum for every equation on the right hand side over all F.
This is probably not what you want.
You are probably looking for an equation for firm 2 that gives you the
quantity of different products.
Positive variables q(I) 'production vector'
M 'production vector for firm 2' ;
Variables P 'price' ;
Equations
dNegprofit(I)
Defp 'Demand function'
TQ 'total quantity for firm 2';
dnegprofit(I)..
C(I) - P + q(I) =g= 0 ;
Defp..P =e= 10-Sum(J, q(J));
TQ.. M =e= Sum(F, q(F));
Model Cournot /dnegprofit.q, defp.p, TQ.M/;
Solve cournot using mcp ;
Renger
-----Original Message-----
From: gamsworld@googlegroups.com [mailto:gamsworld@googlegroups.com] On
Behalf Of ashu
Sent: Thursday, June 18, 2009 11:00 PM
To: gamsworld
Subject: Help with error $ 125
I am trying to make a subset and find out the sum of elements in the subset.
However, I am getting error $125 pl help if you can. my code as below-:
Set
I 'number of products' / 1*3 /
F(I) 'products of firm 2' /2, 3/;
alias (I,J);
Table Data(I, *) 'Marginal cost Data'
C
1 2
2 2
3 2 ;
Parameter C(I) 'Marginal Cost of each firms' ;
C(I)= Data(I,'C');
Positive variables q(I) 'production vector'
M(F) 'production vector for firm 2' ;
Variables P 'price' ;
Equations
dNegprofit(I) 'differentiation of negative profit, d(-profit)/
dq: dTC - p - q(I)*dp'
Defp 'Demand function'
TQ(I) 'total quantity for firm 2';
dnegprofit(I)..
C(I) - P + q(I) =g= 0 ;
Defp..P =e= 10-Sum(J, q(J));
TQ(F).. M(F) =e= Sum(F, q(F)); (The error results in this statement)
Model Cournot /dnegprofit.q, defp.p, TQ/;
Solve cournot using mcp ;
--~--~---------~--~----~------------~-------~--~----~
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
-~----------~----~----~----~------~----~------~--~---
Re: Help with error $ 125
Thanks a lot Renger, I was able to solve it on your advice.
On Jun 19, 1:06 am, Renger van Nieuwkoop
wrote:
> > Hi
> >
> > You are trying to sum over F, but F (as Gams told) you is already under
> > control, meaning in this case:
> > - that you defined this equation over F (so there is an equation for every
> > element of F)
> > - and you sum for every equation on the right hand side over all F.
> > This is probably not what you want.
> >
> > You are probably looking for an equation for firm 2 that gives you the
> > quantity of different products.
> >
> > Positive variables q(I) 'production vector'
> > M 'production vector for firm 2' ;
> >
> > Variables P 'price' ;
> >
> > Equations
> > dNegprofit(I)
> > Defp 'Demand function'
> > TQ 'total quantity for firm 2';
> >
> > dnegprofit(I)..
> > C(I) - P + q(I) =g= 0 ;
> >
> > Defp..P =e= 10-Sum(J, q(J));
> >
> > TQ.. M =e= Sum(F, q(F));
> >
> > Model Cournot /dnegprofit.q, defp.p, TQ.M/;
> >
> > Solve cournot using mcp ;
> >
> > Renger
> >
> > -----Original Message-----
> > From: gamsworld@googlegroups.com [mailto:gamsworld@googlegroups.com] On
> >
> > Behalf Of ashu
> > Sent: Thursday, June 18, 2009 11:00 PM
> > To: gamsworld
> > Subject: Help with error $ 125
> >
> > I am trying to make a subset and find out the sum of elements in the subset.
> > However, I am getting error $125 pl help if you can. my code as below-:
> >
> > Set
> > I 'number of products' / 1*3 /
> > F(I) 'products of firm 2' /2, 3/;
> >
> > alias (I,J);
> >
> > Table Data(I, *) 'Marginal cost Data'
> > C
> > 1 2
> > 2 2
> > 3 2 ;
> >
> > Parameter C(I) 'Marginal Cost of each firms' ;
> >
> > C(I)= Data(I,'C');
> >
> > Positive variables q(I) 'production vector'
> > M(F) 'production vector for firm 2' ;
> >
> > Variables P 'price' ;
> >
> > Equations
> > dNegprofit(I) 'differentiation of negative profit, d(-profit)/
> > dq: dTC - p - q(I)*dp'
> > Defp 'Demand function'
> > TQ(I) 'total quantity for firm 2';
> >
> > dnegprofit(I)..
> > C(I) - P + q(I) =g= 0 ;
> >
> > Defp..P =e= 10-Sum(J, q(J));
> >
> > TQ(F).. M(F) =e= Sum(F, q(F)); (The error results in this statement)
> >
> > Model Cournot /dnegprofit.q, defp.p, TQ/;
> >
> > Solve cournot using mcp ;
--~--~---------~--~----~------------~-------~--~----~
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
-~----------~----~----~----~------~----~------~--~---