circle.pts.density: Define a set of circular point habitats

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

Description

Define a habitat locations within a window using a density function. The maximum value is 1, and the minimum value in the habitat is set by the argument min.d.

Usage

circle.pts.density(x, y, hab.win, min.d = 0.7, ...)

Arguments

x	x coordinates defining the point locations
y	y coordinates of point locations
hab.win	The habitat window as an owin object
min.d	Minimum value of final habitat map.
...	Additional arguments to density.ppp

Value

Habitat value for each location as an im object (as.im). This can be used as the habitat window in spatibm.

Examples

# Example habitat with 3 good habitat locations.
# hab.win is the habitat window.  Minimum value is 0.7
hab.win <- owin(c(-50,50),c(-50,50),unitname="metres")
Use 3 point locations within the -50x50 window
x = c(-20,0,20)
y = c(-20,0,20)
# Note that Z is type im, and sigma,edge are arguments to the density.ppp function.
Z <- circle.pts.density(x,y,hab.win,min.d=0.7,sigma=2,edge=FALSE)
plot(Z)

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