Dear all,
The following code provides a partial example of a code that is run separately for each of the 3 observations in set i.
SETS i /1*3/
.
ALIAS (ii, i) ;
out(i,outp).. sum(ii,lm(i,ii)*y(outp,ii))=E=y(outp,i)*(1+beta1(i));
model uno /out ,.../;
solve uno using nlp maximizing z;
In the GAMS .lst file, equation "out" for observation 1 will look like that
lm(1,1)*y(outp,1)+lm(1,2)*y(outp,2)+lm(1,3)*y(outp,3)=y(outp,1)*(1+beta1(1))
How can I write equation "out" in a way that its left-hand side summation does not include the observation under investigation. In the previous example, the "out" equation will look as follows:
lm(1,2)*y(outp,2)+lm(1,3)*y(outp,3)=y(outp,1)*(1+beta1(1))
Thanks,
Teo
Sum over all observations except the observation under investigation Topic is solved
Re: Sum over all observations except the observation under investigation
Hi Teo,
You could use a dollar condition as follows
I hope this helps!
Fred
You could use a dollar condition as follows
Code: Select all
out(i,outp).. sum(ii$(not sameas(i,ii)),lm(i,ii)*y(outp,ii))=E=y(outp,i)*(1+beta1(i));
Fred
Re: Sum over all observations except the observation under investigation
Thank you, Fred! That was very helpful!
Teo
Teo