estimate_niche: Spatial Abundance Density Index

In agarciaEE/NINA: Niche Interaction Network Analyses

Spatial Abundance Density Index

Description

Estimates the occurrence density index of a set of occurrences over a 2-D grid space

Usage

estimate_niche(
  glob,
  glob1,
  sp,
  R,
  h = "href",
  mask = NULL,
  th.o = NULL,
  th.s = NULL,
  method = c("epa", "bivnorm")
)

Arguments

glob	2-column coordinates matrix of the environmental space
glob1	2-column coordinates matrix of the subset environmental space
sp	2-column coordinates matrix of the species occurrences position on the environmental space
R	extent of the raster to be created
h	smoothing parameter for the kernel estimation. Default is 'href'. Alternatively can be set to 'LSCV' or any given numeric value
mask	raster mask to resample the created kernel density grid raster
th.o	numeric threshold to filter density values of occurrences
th.s	numeric threshold to filter density values of environment
method	"epanechnikov" or "bivnorm"

Value

list object class niche

Examples

## Not run: 
env <- cbind(runif(1000, -1, 5), runif(1000, -2, 10))
sp <- cbind(runif(10, -1, 5), runif(10, -2, 10))
niche<- estimate_niche(sp, ext = c(-1,5,-2,10))
ecospat::ecospat.plot.niiche(niche)

## End(Not run)

agarciaEE/NINA documentation built on Jan. 9, 2025, 10:09 a.m.