expo: The exponetial SAR regression model

In fguilhaumon/mmSAR: mmSAR is an R package for the modelling of the Species-Area Relationship (SAR).

Description

s == z * log(a) + c

Usage

data(expo)

Format

The format is: List of 8 $ name : "Exponential" $ formula : expression(s == z * log(a) + c) $ paramnumber: 2 $ paramnames : "c" "z" $ parLim : "R" "Rplus" $ fun : model function $ rssfun : Residual Sum of Squares function $ init : initial values calculation $ form : a formula object for further calculations

Details

This model is convex non asymptotic. For further details and documentation please see the online documentation at http://mmsar.r-forge.r-project.org/

Source

Gleason (1922, 1925), Fisher et al. (1943), Tjørve (2003).

References

Fisher, R.A., Corbet, A.S. & Williams, C.B. (1943) The relation between the number of species and the number of individuals in a random sample of an animal population. Journal of Animal Ecology, 12, 42–58.

Gleason, H.A. (1922) On the relation between species and area. Ecology, 3, 158–162.

Gleason, H.A. (1925) Species and area. Ecology, 6, 66–74.

Tjørve, E. (2003) Shapes and functions of species–area curves: a review of possible models. Journal of Biogeography, 30, 827–835.

Examples

#loading the expo model object before using it
data(expo)

fguilhaumon/mmSAR documentation built on May 30, 2019, 7:20 p.m.