Defining set element equal to parameter in an equation

Archiver · April 6, 2015, 1:26pm

Hi everyone,
I am a new user of gams.Please help with my problem which I encountered while writing the code.

I need to write an equation eq(k,l) such that P(t,k,l) is equal to one when t is equal to parameteric value m(k,l) for all values of k and l.I have written like this

eq (k,l)… P(t,k,l)$(ord(t) eq m(k,l)) =e= 1;

Error is set for ord is not controlled.
Please reply.

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Archiver · April 6, 2015, 2:06pm

Hi
You have an index t in your equation which is not controlled, so change the equation in eq(k,l,t)
Cheers
Renger

sent from my iPad

On 06 Apr 2015, at 14:02, “shpooja26@gmail.com” wrote:

Hi everyone,
I am a new user of gams.Please help with my problem which I encountered while writing the code.

I need to write an equation eq(k,l) such that P(t,k,l) is equal to one when t is equal to parameteric value m(k,l) for all values of k and l.I have written like this

eq (k,l)… P(t,k,l)$(ord(t) eq m(k,l)) =e= 1;

Error is set for ord is not controlled.
Please reply.

–
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Archiver · April 6, 2015, 2:22pm

Thanks for your reply.But still error remains the same.error says that uncontrolled set has been entered as constant.Can there be any other method of writing the same equation?

On Monday, April 6, 2015 at 5:32:46 PM UTC+5:30, shpo...@gmail.com wrote:

Hi everyone,
I am a new user of gams.Please help with my problem which I encountered while writing the code.

I need to write an equation eq(k,l) such that P(t,k,l) is equal to one when t is equal to parameteric value m(k,l) for all values of k and l.I have written like this

eq (k,l)… P(t,k,l)$(ord(t) eq m(k,l)) =e= 1;

Error is set for ord is not controlled.
Please reply.

–
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Archiver · April 6, 2015, 5:36pm

You should provide us with enough information, so we can reproduce your error.

Renger

Von: gamsworld@googlegroups.com [mailto:gamsworld@googlegroups.com] Im Auftrag von shpooja26@gmail.com
Gesendet: Monday, April 6, 2015 2:22 PM
An: gamsworld@googlegroups.com
Betreff: Re: Defining set element equal to parameter in an equation

Thanks for your reply.But still error remains the same.error says that uncontrolled set has been entered as constant.Can there be any other method of writing the same equation?

On Monday, April 6, 2015 at 5:32:46 PM UTC+5:30, shpo...@gmail.com wrote:

Hi everyone,

I am a new user of gams.Please help with my problem which I encountered while writing the code.

I need to write an equation eq(k,l) such that P(t,k,l) is equal to one when t is equal to parameteric value m(k,l) for all values of k and l.I have written like this

eq (k,l)… P(t,k,l)$(ord(t) eq m(k,l)) =e= 1;

Error is set for ord is not controlled.

Please reply.

\

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Archiver · April 6, 2015, 6:00pm

Thanks for the reply.
My problem is like this.
P(t,k,l) is a binary variable.t set denotes set of time intervals in a day.k is user1 and l is user item.
m(k,l) denotes the user time which of course has been defined for a day.
Now P(t,k,l) will be 1 when user uses the item i.e time of the day when the user starts using the item.
I have entered the m(k,l) values for different users and items.
I defined eq(k,l) for all values of k and l. such that

P(t,k,l)$(ord(t) eq m(k,l)) =e=1;

errors encountered are
1.uncontrolled set entered as constant
2.set for “ord” is not controlled

On Monday, April 6, 2015 at 5:32:46 PM UTC+5:30, shpo...@gmail.com wrote:

Hi everyone,
I am a new user of gams.Please help with my problem which I encountered while writing the code.

I need to write an equation eq(k,l) such that P(t,k,l) is equal to one when t is equal to parameteric value m(k,l) for all values of k and l.I have written like this

eq (k,l)… P(t,k,l)$(ord(t) eq m(k,l)) =e= 1;

Error is set for ord is not controlled.
Please reply.

–
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Archiver · April 6, 2015, 6:20pm

Did you define the equation as eq(t,k,l)…
If yes, then you write the equation like
Eq(t,k,l)$(ord(t) eq m(k,l)…
P(t,k,l) =e= 1;

sent from my iPad

On 06 Apr 2015, at 18:14, “shpooja26@gmail.com” wrote:

Thanks for the reply.
My problem is like this.
P(t,k,l) is a binary variable.t set denotes set of time intervals in a day.k is user1 and l is user item.
m(k,l) denotes the user time which of course has been defined for a day.
Now P(t,k,l) will be 1 when user uses the item i.e time of the day when the user starts using the item.
I have entered the m(k,l) values for different users and items.
I defined eq(k,l) for all values of k and l. such that

P(t,k,l)$(ord(t) eq m(k,l)) =e=1;

errors encountered are
1.uncontrolled set entered as constant
2.set for “ord” is not controlled

On Monday, April 6, 2015 at 5:32:46 PM UTC+5:30, shpo...@gmail.com wrote:
Hi everyone,
I am a new user of gams.Please help with my problem which I encountered while writing the code.


I need to write an equation eq(k,l) such that P(t,k,l) is equal to one when t is equal to parameteric value m(k,l) for all values of k and l.I have written like this

eq (k,l).. P(t,k,l)$(ord(t) eq m(k,l)) =e= 1;

Error is set for ord is not controlled.
Please reply.
–
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Archiver · April 6, 2015, 7:09pm

Yes,it is working now.Thanks for devoting your time for the problem.
Thank you.
On Monday, April 6, 2015 at 5:32:46 PM UTC+5:30, shpo...@gmail.com wrote:

Hi everyone,
I am a new user of gams.Please help with my problem which I encountered while writing the code.

I need to write an equation eq(k,l) such that P(t,k,l) is equal to one when t is equal to parameteric value m(k,l) for all values of k and l.I have written like this

eq (k,l)… P(t,k,l)$(ord(t) eq m(k,l)) =e= 1;

Error is set for ord is not controlled.
Please reply.

–
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Defining set element equal to parameter in an equation

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