Slope and inflection points for the eHOF model types.
Para_deriv(resp, newdata = NULL, model = NULL, p, type = c("slope", "inflection"), ...)For slope a vector of slopes for all newdata points. Inflection points are the extremes of the second derivative.
response model results, see HOF.
new gradient vector, if NULL a vector with 10000 values within gradient range will be used
response model type. If not specified, the output of pick.model will be used.
Vector of model parameters. If not specified, resp$models[[model]]$par will be used.
Output type: slope or inflection points of model curves
further arguments passed to or from other methods, e.g. for pick.model.
Florian Jansen
Peper, J., Jansen, F., Pietzsch, D., Manthey, M. 2011. Patterns of plant species turnover along grazing gradients. Journal of Vegetation Science 22: 457–466.