Interacting with Sets

To refer to sets in equations, the set object must be an index value (1, 2, 3, etc.)

Example:

for year in Years, area in Areas

Multiplier[area,year] = 0.50

end

is the same as:

Multiplier[1,1] = 0.50 # area = 1, year = 1

Multiplier[2,1] = 0.50 # area = 2, year = 1

Multiplier[3,1] = 0.50 # area = 3, year = 1

...

Multiplier[25,1] = 0.50 # area = 25, year = 1

Multiplier[1,2] = 0.50 # area = 1, year = 2

Multiplier[2,2] = 0.50 # area = 2, year = 2

Multiplier[3,2] = 0.50 # area = 3, year = 2

...

In the data struct, we define two types of set containers: with and without a final 's'. For example, Area vs Areas.

Capitalized set names without a final 's' (ex: Area) store a vector of set keys (ex: "AB", "BC",...)
Capitalized set names with a final 's' (ex: Areas) store the indexes as a vector of integers (ex: 1, 2, etc.)