expo: The exponetial SAR regression model

In 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), Tj<c3><b8>rve (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<e2><80><93>58.

Gleason, H.A. (1922) On the relation between species and area. Ecology, 3, 158<e2><80><93>162.

Gleason, H.A. (1925) Species and area. Ecology, 6, 66<e2><80><93>74.

Tj<c3><b8>rve, E. (2003) Shapes and functions of species<e2><80><93>area curves: a review of possible models. Journal of Biogeography, 30, 827<e2><80><93>835.

Examples

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

mmSAR documentation built on May 2, 2019, 5:24 p.m.