growthmodels: negativeExponential – R documentation

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negativeExponential

Negative exponential growth model

Description

Computes the negative exponential growth model

y(t) = α * ( 1 - exp(-k * t))

Usage

negativeExponential(t, alpha, k)

  negativeExponential.inverse(x, alpha, k)

Arguments

`t`	time
`x`	size
`alpha`	upper asymptote
`k`	growth rate

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.

Examples

growth <- negativeExponential(0:10, 1, 0.3)
# Calculate inverse function
time <- negativeExponential.inverse(growth, 10, 0.3)

growthmodels

Nonlinear Growth Models

v1.2.0

GPL-3

Authors

Daniel Rodriguez Perez

Initial release

2013-11-23