dist_between_centroids
                        Compute the distance between group centroids
dist_get                Retrieve distances from a '"dist"' object.
                        Check if square Check if numeric
dist_groups             Create a data frame of distances between groups
                        of items.
dist_make               Make a distance matrix using a custom distance
                        function
dist_setNames           Set the names/labels of a '"dist"' object.
dist_subset             Extract parts of a '"dist"' object.
dist_to_centroids       Compute distances from each item to group
                        centroids
usedist                 usedist: a package for working with distance
                        matrices in R
