raintreesCOV {SpatEntropy}

Covariates for the rainforest tree data.

Description

A list of two pixel images with covariates altitude and soil slope for the rainforest tree data 1 and 2, i.e. raintrees and raintrees2

Usage

raintreesCOV

Format

A list of two elements:

elev

An object of type im (see package spatstat), the soil elevation

grad

An object of type im (see package spatstat), the soil slope (gradient of elevation)

Details

For details of the point datasets, see raintrees and raintrees2. This accompanying dataset gives information about the elevation in the study region. It is a list containing two pixel images, elev (elevation in metres) and grad (norm of elevation gradient). These pixel images are objects of class im. Covariate values are continuous. Once discretized as wished, they can turn into categorical datasets for the computation of all entropy measures. Moreover, they can be used to build sensible sub-areas for Batty's and Karlstrom and Ceccato's entropies (see the examples).

Source

http://www.ctfs.si.edu

Examples

data(raintreesCOV)
plot(raintreesCOV, main="")