occs2sparse {bamm}

occs2sparse: Converts occurrence data into a sparse matrix object

Description

occs2sparse: Converts occurrence data into a sparse matrix object

Usage

occs2sparse(modelsparse, occs)

Arguments

modelsparse

A setA object returned by the function model2sparse

occs

A matrix or a data.frame containing two columns. The first one is the longitude and the second is the latitude.

Details

Rows of this column vector represent non NA pixels of the niche model.

Value

A sparse vector of zeros (presences) and ones (absences).

Author(s)

Luis Osorio-Olvera & Jorge Soberón

Examples

model_path <- system.file("extdata/Lepus_californicus_cont.tif",
                          package = "bamm")
model <- raster::raster(model_path)

sparse_mod <- bamm::model2sparse(model,threshold=0.05)

occs_lep_cal <- data.frame(longitude = c(-115.10417,
                                         -104.90417),
                           latitude = c(29.61846,
                                        29.81846))

occs_sparse <- bamm::occs2sparse(modelsparse = sparse_mod,
                                occs = occs_lep_cal)

head(occs_sparse)