Compute multivariate environmental similarity surfaces (MESS), as described by Elith et al., 2010.
Usage
extrapol_mess(x, training, .col, ...)
# Default S3 method
extrapol_mess(x, training, ...)
# S3 method for class 'SpatRaster'
extrapol_mess(x, training, .col, filename = "", ...)
# S3 method for class 'data.frame'
extrapol_mess(x, training, .col, ...)
# S3 method for class 'SpatRasterDataset'
extrapol_mess(x, training, .col, ...)Arguments
- x
- training
matrix or data.frame or sf object containing the reference values; each column should correspond to one layer of the
terra::SpatRasterobject, with the exception of the presences column defined in.col(optional).- .col
the column containing the presences (optional). If specified, it is excluded when computing the MESS scores.
- ...
additional arguments as for
terra::writeRaster()- filename
character. Output filename (optional)
Value
a terra::SpatRaster (data.frame) with
the MESS values.
Details
This function is a modified version of mess in
package predicts, with a method added to work on terra::SpatRasterDataset.
Note that the method for terra::SpatRasterDataset assumes that each variables
is stored as a terra::SpatRaster with time information within x. Time
is also assumed to be in years. If these conditions are not met, it is possible
to manually extract a terra::SpatRaster for each time step, and use
extrapol_mess on those terra::SpatRasters