Description Usage Arguments Author(s) References Examples
Computes the Morgan-Mercer-Flodin growth model
y(t) = (w_0 * γ + α * t^m) / (γ + t^m)
1 2 3 | mmf(t, alpha, w0, gamma, m)
mmf.inverse(x, alpha, w0, gamma, m)
|
t |
time |
alpha |
upper asymptote |
w0 |
the value at t = 0 |
gamma |
parameter that controls the point of inflection |
m |
growth rate |
x |
size |
Daniel Rodriguez
A. Khamiz, Z. Ismail, and A. T. Muhammad, "Nonlinear growth models for modeling oil palm yield growth," Journal of Mathematics and Statistics, vol. 1, no. 3, p. 225, 2005.
1 2 3 4 | growth <- mmf(0:10, 10, 0.5, 4, 1)
# Calculate inverse function
time <- mmf.inverse(growth, 10, 0.5, 4, 1)
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