Indicator day of week

Ongoing

Vida Yousefinezhad

• February 14, 2024 04:40
• Edited

Hi everyone!

I am using a forecasting model and want to code the following:

mu is a coefficient of I. V is the Day of the week (V: = {Mon, Tue, ..., Sun}). I(Φ(t)=v) is the indicator function and Φ(t) is a function returning the day of the week corresponding to t. So, my question is how I can code I(Φ(t)=v) in Python with the GUROBI package. I wrote the following code, but I am not sure about it. 

day_indicator = model.addVar(obj=0, vtype=gp.GRB.BINARY, name="day_indicator")
def Phi(t):
       return days_of_week[t % 7]
sum(mu0[beta, v] * day_indicator for v in range(a) if Phi(t) == days_of_week[v])

Thank you in advance!

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• 

  Riley Clement

  Gurobi Staff

  • February 14, 2024 13:18

  Hi Vida,

  I think there is probably a better way of achieving what you want.

  sum(mu0[beta, v] * day_indicator for v in range(a) if Phi(t) == days_of_week[v])

  Where has t come from here?  It is not defined in your code snippet.

  - Riley

  0
• 

  Vida Yousefinezhad

  • February 14, 2024 22:49

  

  

  Hi Riley,

  t refers to each period (each day) in the planning horizon, p=20, and beta refers to the product in b=4. 

  -Vida

   

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