crossdist_fast          Fast pairwise (cross) Euclidean distances
iccsurface              Latent-Space Item Characteristic _Surface_
intermap2d              2-D latent-space interaction map (persons vs.
                        items)
interprofile            Draw a Posterior Interaction Profile in either
                        style
itemheatmap             Heat-map of item-item similarity in latent
                        space
itemsimilarity          Similarity profile for a focal item
lsirmicc                Latent-Space Item Characteristic Curve (ICC)
pip_fountain            Posterior Interaction Profile - _Fountain_
                        style
pip_waterfall           Posterior Interaction Profile - _Waterfall_
                        style
radarplot               Radar plot of branch-specific abilities (single
                        or multiple subjects)
rescale_to_range        Rescale a numeric vector to a new range
strengthplot            Item-strength profile for a single person
vec_mat_dist            Euclidean distance from a single vector to each
                        row of a matrix
