# Curve derivatives of eHOF models

### Description

Slope and inflection points for the eHOF model types.

### Usage

1 |

### Arguments

`resp` |
response model results, see |

`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 |

`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 |

### 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.