Function to convert binary raster models to a Presence Absences Matrix.
Arguments
- mods_stack
A raster stack containing binary models of each species in the community.
- return_coords
Logical. If TRUE the pam will be returned with coordinates in the first two columns.
- sparse
Logical. If TRUE the PAM will be returned as a sparse matrix.
- parallel
Logical. If TRUE computations will be done in parallel
- ncores
Integer. Number of cores to run the parallel process.
References
Soberon J, Cavner J (2015). “Indices of Biodiversity Pattern Based on Presence-Absence Matrices: A GIS Implementation.” Biodiversity Informatics, 10, 22--34. .
Examples
# \donttest{
lagos_path <- system.file("extdata/conejos",
package = "bamm")
enm_path <- list.files(lagos_path,
pattern = ".tif",
full.names = TRUE)[1:10]
en_models <- raster::stack(enm_path) >0.01
pam <- bamm::models2pam(en_models,
return_coords=TRUE,
sparse=FALSE,
parallel=FALSE,ncores=2)
head(pam)
#> x y Brachylagus_idahoensis_cont Lepus_alleni_cont
#> 1 -91.66667 82.66667 0 0
#> 2 -90.66667 82.66667 0 0
#> 3 -89.66667 82.66667 0 0
#> 4 -88.66667 82.66667 0 0
#> 5 -87.66667 82.66667 0 0
#> 6 -86.66667 82.66667 0 0
#> Lepus_americanus_cont Lepus_arcticus_cont Lepus_californicus_cont
#> 1 0 0 0
#> 2 0 0 0
#> 3 0 0 0
#> 4 0 0 0
#> 5 0 0 0
#> 6 0 0 0
#> Lepus_callotis_cont Lepus_europaeus_cont Lepus_othus_cont
#> 1 0 0 0
#> 2 0 0 0
#> 3 0 0 0
#> 4 0 0 0
#> 5 0 0 0
#> 6 0 0 0
#> Lepus_townsendii_cont Ochotona_collaris_cont
#> 1 0 0
#> 2 0 0
#> 3 0 0
#> 4 0 0
#> 5 0 0
#> 6 0 0
# }