mmf: Morgan-Mercer-Flodin growth model

In drodriguezperez/growthmodels: Nonlinear Growth Models

Description

Computes the Morgan-Mercer-Flodin growth model

y(t) = (w_0 * γ + α * t^m) / (γ + t^m)

Usage

mmf(t, alpha, w0, gamma, m)

mmf.inverse(x, alpha, w0, gamma, m)

Arguments

t	time
alpha	upper asymptote
w0	the value at t = 0
gamma	parameter that controls the point of inflection
m	growth rate
x	size

Author(s)

Daniel Rodriguez

References

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.

Examples

growth <- mmf(0:10, 10, 0.5, 4, 1)

# Calculate inverse function
time <- mmf.inverse(growth, 10, 0.5, 4, 1)

drodriguezperez/growthmodels documentation built on May 15, 2019, 2:42 p.m.