Separate Braun-Blanquet abundance-cover from sociability — separate

Transforms strings of Braun-Blanquet indices with sociability, in a vector of two values, separating the cover-abundance index from the sociability index.

Usage

separate_indices(x)

Arguments

x: character A string with a Braun-Blanquet indices with sociability.

Value

The function returns a vector with two components, the first one with the abundance-cover index, and the second one with the sociability index. For the special case of the "+" index, the function returns "c("+", 1)". For any other cases of single symbols (e.g. "r", "(+)", "(x)"), the function returns NA for the sociability value.

Details

This function is intended to be used only with relevés using Braun-Blanquet sociability indices, i.e. using "OBBsoc", "OBBsoX", "EBBsoc" or "EBBsoX" scales (see releve_scale function). The use of this function with other scales might give inappropriate results (e.g. this function interprets "+" to have sociability value of "1", even if this is not recorded in the relevé, because such sociability is usually omitted).

Author

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