Description Usage Arguments Author(s) References Examples
Computes the von Bertalanffy growth model
y(t) = (α^(1-m) - β * exp(-k * t))^(1/(1-m))
1 2 3 | vonBertalanffy(t, alpha, beta, k, m)
vonBertalanffy.inverse(x, alpha, beta, k, m)
|
t |
time |
alpha |
upper asymptote |
beta |
growth range |
k |
growth rate |
m |
slope of growth |
x |
size |
Daniel Rodriguez
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.
1 2 3 4 | growth <- vonBertalanffy(0:10, 10, 0.5, 0.3, 0.5)
# Calculate inverse function
time <- vonBertalanffy.inverse(growth, 10, 0.5, 0.3, 0.5)
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