Return a seasonal pattern \(F_S(t)\), a function of the form $$F_S(t) = c \left(1+\epsilon + \sin\left(\frac{2 \pi (t-\tau)}{P}\right)\right)^q$$ where \(c\) is a normalizing constant, and
\(\epsilon \geq 0\) or
bottom\(\tau\) or
phase\(q\) or
pw\(P\) or
period
The algorithm sets the constant \(c\) or norm
such that $$c\int_0^{P} F_S(t) dt=P$$.
Usage
# S3 method for class 'sin'
make_function(F_obj)