wrapHossfeld: Fitting Hossfeld growth function.

In wpetry/IPMpack2: Builds and analyses Integral Projection Models (IPMs).

Fitting Hossfeld growth function.

Description

Function to define deviance of a Hossfeld function for use with optim to generate a Hossfeld growth object.

Usage

wrapHossfeld(par, dataf)

Arguments

par	vector of length three.
dataf	dataframe with columns size and incr.

Author(s)

C. Jessica E. Metcalf, Sean M. McMahon, Roberto Salguero-Gomez, Eelke Jongejans & Cory Merow.

References

Zuidema, Jongejans, Chien, During & Schieving. Integral projection models for trees: a new parameterization method and a validation of model output. Journal of Ecology 98, p345-355.

See Also

Hossfeld

Examples

# Simulate data and create a column for growth increment
dff <- generateData()
dff$incr <- dff$sizeNext - dff$size

# Current sum of squares
wrapHossfeld(c(1, 1, 1), dff)

# Use optim to get best parameters values [not run]
tmp <- optim(c(1, 1, 1), wrapHossfeld, dataf = dff, method = "Nelder-Mead")

wpetry/IPMpack2 documentation built on Sept. 29, 2022, 9:41 a.m.