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.
read_biss               Read data from BiSS (Biodiversity Investigation
                        Support System) to data frame.
shdi                    Helper function for calculating diversity
