I'm currently importing demand as a set of SKU(s), City(c ), State(s),
TransMode(m) tuple parameters. I'd like to eliminate a dimension by
concatenating the City and State into one element. I see how to do this for a
set:
set LOC := setof{(s, c, st, m) in DMD_t}(c&", "&st); #the set of valid
City/State combination
set DMD := setof{(s, c, st, m) in DMD_t}(s, c&", "&st, m); #The demand set:
SKU, City/State, Mode
Where DMD_t is my temporary demand set of imported data with dimension 4, and
DMD is the 3 dimension set I'd like to work with in the model.
My question: Is there a similar construct for converting a 4-tuple parameter to
a 3-tuple?
That is, can I somehow convert:
Parameter Demand_t[s, c, st, m] to Parameter Demand[s, l, m] by concatenating
the city and state dimenstions.
I realize I could concatenate the fields in my input data, but I'm curious if
there is a way to accomplish this with parameter manipulation. I'm new to
glpk, so apologies in advance if this is a silly question.
Thanks for your help,
Rob
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