Computes the Weibull growth model $$y(t) = \alpha -
\beta exp(-k * t^m)$$
Usage
weibull(t, alpha, beta, k, m)
Arguments
t
time
alpha
upper asymptote
beta
growth range
k
growth rate
m
slope of growth
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.