How should you treat "days" as a variable from a statistical perspective. The "days" variable can be defined as an integer describing the day of the year as follows: days = 1,2,3,4...365.
- Using a dummy variable approach would create a lot of extra variables, and i'm not sure that is a wise decision.
- Using a integer approach, simply stating that days = [0,365], is also not necessarily correct since the dependent variable might increase during H1 and decrease during H2, such that the variable impact cancels out?
Any take on how to deal with such a varialbe?