Para-deriv: Curve derivatives of eHOF models

In eHOF: Extended HOF (Huisman-Olff-Fresco) Models

Curve derivatives of eHOF models

Description

Slope and inflection points for the eHOF model types.

Usage

Para_deriv(resp, newdata = NULL, model = NULL, p, type = c("slope", "inflection"), ...)

Arguments

resp	response model results, see HOF.
newdata	new gradient vector, if NULL a vector with 10000 values within gradient range will be used
model	response model type. If not specified, the output of pick.model will be used.
p	Vector of model parameters. If not specified, resp$models[[model]]$par will be used.
type	Output type: slope or inflection points of model curves
...	further arguments passed to or from other methods, e.g. for pick.model.

Value

For slope a vector of slopes for all newdata points. Inflection points are the extremes of the second derivative.

Author(s)

Florian Jansen

References

Peper, J., Jansen, F., Pietzsch, D., Manthey, M. 2011. Patterns of plant species turnover along grazing gradients. Journal of Vegetation Science 22: 457–466.

eHOF documentation built on April 23, 2022, 1:05 a.m.