mmf: Morgan-Mercer-Flodin growth model

Description Usage Arguments Author(s) References Examples

Description

Computes the Morgan-Mercer-Flodin growth model

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

Usage

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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

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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.