Process module to generate random (optionally biased) background records in cells of the covariate raster and return these along with the presence only data.
Background(.data, n = 100, bias = NULL, seed = NULL)
.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.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.set.seed1.1
2016-03-23
presence-only
Other process: AddRandomUniformPredictors,
BackgroundAndCrossvalid,
Bootstrap, Clean,
Crossvalidate,
JitterOccurrence, MESSMask,
NoProcess,
OneHundredBackground,
OneThousandBackground,
PartitionDisc,
StandardiseCov,
TargetGroupBackground,
Transform, addInteraction