richards: Richards growth law
In grofit: The package was developed to fit fit many growth curves obtained under different conditions.

The function calculates the values of the Richards growth curve for given time points.

1	richards(time, A, mu, lambda, addpar)

`time`	Time points (x-axes) for which the function values will be returned.
`A`	Maximum of the curve. If a vector is provided only the first entry is used.
`mu`	Maximum slope. If a vector is provided only the first entry is used.
`lambda`	Lag-phase. If a vector is provided only the first entry is used.
`addpar`	Numeric vector of size one, corresponding to shape parameter ν.

The function follows the parametrization

A[1+nu exp(1+nu+mu/A (1+nu)^(1+1/nu)(lambda-t))^(-1/nu)]

Numeric vector giving the values of Richards growth law for numeric input vector time.

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x <- 1:30
y <- richards(x, 10, 2, 5, 3)
plot(x,y)

grofit documentation built on May 30, 2017, 4:08 a.m.

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