backg {phyloregion} | R Documentation |
Sample background points
Description
Generates background sample as null for species distribution modeling and other things.
Sample random background points using a vector of probability weights.
Usage
backg(calib, spatkde, size = 10000, ...)
randpoints(ras, size, prob = NULL, ...)
Arguments
calib |
A SpatRaster of the species calibration area. If a polygon, convert to SpatRaster using rasterize. |
spatkde |
A weighted or unweighted Gaussian Kernel Density estimate (KDE) for all input occurrence records. |
size |
An positive integer of the number of samples to generate. |
... |
further arguments passed to or from other methods. |
ras |
Input SpatRaster |
prob |
Vector of probability weights for obtaining the points sampled. |
Value
A dataframe containing the generated background points.
A dataframe with sampled points.
[Package phyloregion version 1.0.9 Index]