Help defining equation in GAMS language

GAMS
1

I want to do the following summation inside the objective function:

sum( (t , i ), A(first element of set t, i) * B( i ) * C( t ) )

Parameter A( t , i ) is defined for all elements of t, but I want to use only the first element in that part of the equation.

I would appreciate you help!

Thanks!

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2

Hello,

You can do the following:

SUM(i, A(‘1’,i)*B(i))*SUM(t, C(t))


Cheers,
Pedro


On 22 Jan 2013, at 16:37, Lucy N wrote:

I want to do the following summation inside the objective function:

sum( (t , i ), A(first element of set t, i) * B( i ) * C( t ) )

Parameter A( t , i ) is defined for all elements of t, but I want to use only the first element in that part of the equation.

I would appreciate you help!

Thanks!

–
To view this discussion on the web visit https://groups.google.com/d/msg/gamsworld/-/HNb0OxTKLBUJ.
To post to this group, send email to gamsworld@googlegroups.com.
To unsubscribe from this group, send email to gamsworld+unsubscribe@googlegroups.com.
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–
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3

Thanks, but I get an error because I haven’t defined the set yet.

I want to define the set later in the code. Is that possible?





On Tuesday, January 22, 2013 1:47:43 PM UTC-3, PowerChile wrote:

Hello,

You can do the following:

SUM(i, A(‘1’,i)*B(i))*SUM(t, C(t))


Cheers,
Pedro


On 22 Jan 2013, at 16:37, Lucy N wrote:

I want to do the following summation inside the objective function:

sum( (t , i ), A(first element of set t, i) * B( i ) * C( t ) )

Parameter A( t , i ) is defined for all elements of t, but I want to use only the first element in that part of the equation.

I would appreciate you help!

Thanks!


--
To view this discussion on the web visit https://groups.google.com/d/msg/gamsworld/-/HNb0OxTKLBUJ.
To post to this group, send email to gams...@googlegroups.com.
To unsubscribe from this group, send email to gamsworld+...@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en.

–
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