Computes the Logistic growth model $$y(t) =
\frac{\alpha}{1 + \beta exp(-k t)}$$
Usage
logistic(t, alpha, beta, k)
Arguments
t
time
alpha
upper asymptote
beta
growth range
k
growth rate
References
D. Fekedulegn, M. Mac Siurtain, and J. Colbert,
"Parameter estimation of nonlinear growth models in
forestry," Silva Fennica, vol. 33, no. 4, pp. 327-336,
1999.