R/exdet_univar.R
exdet_univar.Rd
exdet_univa calculates NT1 metric.
exdet_univar(M_calibra, G_transfer, G_mold = NULL)
A SpatRaster or a Matrix of variables representing the
calibration area (M area in ENM context). If M_calibra is matrix it should
contain the values of environmental variables as get it from
values
function.
A SpatRaster or a Matrix of variables representing areas
or scenarios to which models will be transferred. If G_transfer is matrix
it should contain the values of environmental variables as get it
from values
function.
a Raster representing the extent of the projection area. This is only necessary when G_stack is of class matrix; G_mold will we use as a mold to save the NT1 values computed by exdet_univa function.
NT1 metric (univariate extrapolation) as a SpatRaster object.
The exdet univariate (exdet_univar
)
and multivariate (exdet_multvar
) is calculated
following: Mesgaran, M.B., Cousens, R.D. & Webber, B.L. (2014)
Here be dragons: a tool for quantifying novelty due to covariate
range and correlation change when projecting species distribution models.
Diversity & Distributions, 20: 1147–1159, DOI: 10.1111/ddi.12209.
m_calibra <- terra::rast(list.files(system.file("extdata/M_layers",
package = "smop"),
pattern = ".tif$",
full.names = TRUE))
g_transfer <- terra::rast(list.files(system.file("extdata/G_layers",
package = "smop"),
pattern = ".tif$",
full.names = TRUE))
NT1 <- smop::exdet_univar(M_calibra = m_calibra,
G_transfer = g_transfer,G_mold=NULL)
terra::plot(NT1)