cluster                 Helper function for clustering methods
d                       Calculating diversity
df2table                Convert data.frame and table to each other.
draw_layer_construction
                        Draw layer construction plot
gen_example             Generate vegetation example
ind_val                 Helper function for Indicator Species Analysis
is_one2multi            Check cols one-to-one, or one-to-multi in
                        data.frame
ordination              Helper function for ordination methods
pad2longest             Pad a string to the longest width of the
                        strings.
pseudospecies           Pseudospecies transformation
read_biss               Read data from BiSS (Biodiversity Investigation
                        Support System) to data frame.
shdi                    Helper function for calculating diversity
tw_downweight           Downweighting of rare pseudospecies
tw_hill_const           Constants of the original TWINSPAN
tw_inertia              Total inertia of a pseudospecies matrix
tw_preference           Preference of pseudospecies for one side of a
                        division
tw_ra                   Reciprocal averaging (first correspondence
                        analysis axis)
tw_species_data         Data on which the species of TWINSPAN are
                        classified
tw_two_way              Ordered two-way table of a TWINSPAN result
twinspan                Two-way indicator species analysis (TWINSPAN)
