How to define JuMP expressions using a loop

Specific Domains Optimization (Mathematical)
2

This is a reasonable way to initialize this. The only thing to change is that you should initialize BatteryCap = Array{AffExpr,2}(undef, nHours, n). (Linear JuMP expressions are type AffExpr, not Float64.)

The other option is to write it as something like

@expression(
    model,
    BatteryCap[k = 1:nHours, j = 1:n],
    initialCapacity[j] + sum(Charging[i, j] - Discharging[i, j] for i = 2:k)
)
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