Background: Process module: Background

In zoonproject/modules: Species Distribution Modelling Code Modules for the ZOON Package

Description

Process module to generate random (optionally biased) background records in cells of the covariate raster and return these along with the presence only data.

Usage

Background(.data, n = 100, bias = NULL, seed = NULL)

Arguments

.data	Internal parameter, do not use in the workflow function. .data is a list of a data frame and a raster object returned from occurrence modules and covariate modules respectively. .data is passed automatically in workflow from the occurrence and covariate modules to the process module(s) and should not be passed by the user.
n	the number of background points to sample
bias	optional RasterLayer with cells giving the relative probability of a background record being sampled there. Alternatively, a length one numeric giving a radius (in KM) around presence points to take background points from. If bias = NULL (the default) then no biasing is applied, and all non-missing cells are equally likely to be selected.
seed	Numeric used with set.seed

Version

1.5

Date submitted

2017-11-28

Data type

presence-only

Author(s)

ZOON Developers, Simon Kapitza [e-mail]

See Also

Other process: AddRandomUniformPredictors, BackgroundAndCrossvalid, Bootstrap, CarolinaWrenValidation, Clean, Crossvalidate, JitterOccurrence, LonLatToCovariates, MESSMask, NoProcess, OneHundredBackground, OneThousandBackground, PartitionDisc, RemoveNAs, StandardiseCov, SubsampleOccurrence, TargetGroupBackground, Transform, addInteraction, spThin

zoonproject/modules documentation built on May 4, 2019, 11:25 p.m.