Select taxa by a 'constancy' range

Trims a phytosociological table using the given 'constancy' range.

Usage

select_taxa(m, const = c(0, 100), min.pres = NULL)

Arguments

m

A matrix, i.e. a phytosociological table of 0s (absences) and 1s (presences), where rows correspond to taxa and columns correspond to relevés.

const

A vector with two numeric values, which will be used as minimum (the first value) and maximum (the second value) 'constancy' values to trim table m.

min.pres

A numeric integer giving, optionally, the minimum number presences of each taxon (in all relevés). If provided, it overrides the 'constancy' range.

Value

A list with the following components:

remo.rel

The indices of the removed relevé(s).

remo.sp

The indices of the removed taxon(taxa).

m.select

The trimmed table.

Details

The function accepts a phytosociological table (m), and minimum and maximum 'constancy' values (const). It returns a trimmed phytosociological table, removing taxa outside the given 'constancy' range and removing relevés that become empty. Optionally, a minimum number of presences (in relevés) might be used (min.pres) instead of the 'constancy' range.

Author

Tiago Monteiro-Henriques. E-mail: tmh.dev@icloud.com.