Coefficient Files

Ccoefficient files are also called .F12 files, located in the inputs\coefficients folder. They supply coefficients to a number of models inside Daysim.

FILE FORMAT

Each line of a .F12 file is similar as this:

Where:
A: parameter id
B: label
C: constraint
D: value

Size variable: label starting with 'Gamm'
Size function multiplier: label starting with 'LSM_'
Nest coefficient: label starting with 'Nest'
A fixed parameter: C == lower case of 'T' or 'C'
Base size variable: a fixed size variable whose value is almost 0 (abs(D-0)<=1E-40

Utility Formulation

Utility(A) = Utility(A) + D
Where:
D != 0 and A is not a size variable

Size(A) = Size(A) + D
Where : A is a base size variable

Size(A) = Size(A) + exp(D)
Where: A: is a size variable