circle.only: Define a circular habitat with constant value

In pwhigham/spatibm: A Spatial Individual-based model for land-based organisms

Description

Create a circular habitat with a value of inside within a defined distance from the origin(0,0), and outside elsewhere.

Usage

circle.only(x, y, dist.inside = 50, inside = 1, outside = 0)

Arguments

x	x coordinate
y	y coordinate
dist.inside	Distance from the origin (0,0) with habitat value inside
inside	Value of habitat within dist.inside from the origin
outside	Value of habitat further than dist.inside from the origin

Value

Habitat value for each location. This function is used in conjunction with as.im to produce an image that defines the habitat.

Examples

hab.win <- owin(c(-50,50),c(-50,50),unitname="metres")
Z <- as.im(circle.only,hab.win,dist.inside=10,inside=0.8,outside=0.2)
plot(Z)

pwhigham/spatibm documentation built on Aug. 30, 2019, 1:16 p.m.