siland.quantile {siland}

Quantile of spatial influence function (SIF)

Description

function computing quantiles of SIF, i.e. the radius of disk on which the integrated influence of the SIF is equal to given proportions, p. Calculations are performed for the estimated SIF of each landscape variable in x.The area of medium influence and significant influence of a landscape variable, that we defined as the disc containing 50% and 95% of the influence of the SIF (neglecting 50% and 5% of its broader effect) respectively can be computed using argument p = 0.5 and p = 0.95, respectively.

Usage

siland.quantile(x, p = 0.95)

Arguments

x

an object of class siland resulting from function siland

p

a vector of probabilities

Value

A matrix of the radii of disks on wich the integrated influences of the SIF estimated for each landscape variable of x (in columns) are equal to each probability of the vector p (in rows).

Author(s)

O. Martin and F. Carpentier

Examples

data(dataSiland)
data(landSiland)
res=siland(obs~x1+L1+L2,land=landSiland,data=dataSiland,sif="exponential")
#siland.quantile(x=res,p=c(0.5,0.95))