add_data                Add occurrence points or other data to an
                        existing E-space plot
add_data_3d             Add data to an existing 3D E-space plot
add_ellipsoid           Add an ellipsoid boundary to an existing
                        E-space plot
add_ellipsoid_3d        Add an ellipsoid to an existing 3D E-space plot
apply_bias              Apply sampling bias to suitability surfaces
back_data               Background environmental data for examples
build_ellipsoid         Build a probabilistic ellipsoidal niche from
                        ranges
conserved_ellipses      Generate ellipses via multivariate normal
                        biased sampling
covariance_limits       Calculate safe covariance ranges for positive
                        definiteness
ellipsoid_calculator    Calculate n-dimensional ellipsoid metrics
ellipsoid_volume        Compute ellipsoid hypervolume
example_ellipsoids      Example niche ellipsoid objects for virtual
                        communities
ma_bios                 Bioclimatic variables for part of the Americas
nested_ellipses         Generate nested ellipses based on a reference
                        ellipse
plot_community          Plot a nicheR Community of Ellipses
plot_ellipsoid          Plot a nicheR ellipsoid in environmental space
plot_ellipsoid_3d       Plot a nicheR ellipsoid in 3D environmental
                        space
plot_ellipsoid_pairs    Plot all pairwise 2D ellipsoid projections
predict                 Predict suitability and Mahalanobis distance
                        from a nicheR ellipsoid
prepare_bias            Prepare sampling bias surfaces
print                   Print method for nicheR objects
random_ellipses         Generate random ellipses constrained by a point
                        cloud and a reference ellipse
range_utilities         Compute variable ranges from data or statistics
                        with optional expansion
read_nicheR             Read a nicheR object from disk
ref_ellipse             Reference ellipse for virtual community
                        examples
sample_biased_data      Sample occurrence data from a bias-weighted
                        prediction surface
sample_data             Sample occurrence data from a prediction
                        surface
save_nicheR             Save a nicheR object to disk
update_covariance       Update covariance values and calculate
                        remaining safe limits
update_ellipsoid_covariance
                        Update covariances in a nicheR ellipsoid and
                        recompute metrics
virtual_data            Generate data based on a ellipsoidal niche
