Print Correlated Variables
Utility that prints the name of correlated variables and the relative correlation coefficient value.
corVar( bg, method = "spearman", cor_th = NULL, order = TRUE, remove_diagonal = TRUE )
bg |
SWD object with the locations used to compute the correlation between environmental variables. |
method |
character. The method used to compute the correlation matrix,
default is |
cor_th |
numeric. If provided it prints only the variables whose
correlation coefficient is higher or lower than the given threshold, default
is |
order |
logical, if |
remove_diagonal |
logical, if |
The name of the correlated variables.
Sergio Vignali
# Acquire environmental variables
files <- list.files(path = file.path(system.file(package = "dismo"), "ex"),
pattern = "grd", full.names = TRUE)
predictors <- raster::stack(files)
# Prepare background locations
bg_coords <- dismo::randomPoints(predictors, 10000)
# Create SWD object
bg <- prepareSWD(species = "Virtual species", a = bg_coords,
env = predictors, categorical = "biome")
# Get the correlation among all the environmental variables
corVar(bg, method = "spearman")
# Get the environmental variables that have a correlation greater or equal to
# the given threshold
corVar(bg, method = "pearson", cor_th = 0.8)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.