tr.cont.scale {mFD}

Scale continuous traits

Description

This function standardizes continuous traits. It can be useful before computing functional space. You will have to choose which standardized method to use based on your data. For this function to work, there must be no NA in your sp_tr data frame.

Usage

tr.cont.scale(sp_tr, std_method = "scale_center")

Arguments

sp_tr

a data frame of traits values (columns) for each species (rows). Note that species names must be specified in the row names and traits must be continuous.

std_method

a character string referring to the standardization method. Possible values: range (standardize by the range), center (use the center transformation: x' = x - mean(x)), scale (use the scale transformation: x' = \frac{x}{sd(x)}), or scale_center (use the scale-center transformation: x' = \frac{x - mean(x)}{sd(x)}). Default is scale_center.

Value

A data frame of standardized trait values (columns) for each species (rows).

Author(s)

Camille Magneville and Sebastien Villeger

Examples

load(system.file('extdata', 'sp_tr_cestes_df', package = 'mFD'))

mFD::tr.cont.scale(sp_tr = sp_tr, std_method = 'scale_center')