The result is the same either way.
Bob Fourer
4er@...
> -----Original Message-----
> From:
ampl@... [mailto:
ampl@...]
> On Behalf Of hessam [
hessam.1983@...]
> Sent: Monday, October 05, 2009 9:05 PM
> To: AMPL Modeling Language
> Subject: [AMPL 2867] grouping for SUM
>
> Hi All,
>
> Assume that "x" is table with 10*10*10 dimension. Is there any
> difference between these lines??
>
> 1- total = sum{ i in 1..10, j in 1..10, k in 1..10} x[i,j,k]
>
> 2- total = sum{ i in 1..10} ( sum{j in 1..10} ( sum{k in 1..10} x
> [i,j,k] ))
>
> Thanks,
> Hessam
>
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