rdpi: RDPI

In ameztegui/gradients: A package to assess the role of environmental variables on plant traits across ecological gradients

Description

Function to compute the RDPI (Relative Distance Plasticity Index, Valladares et al, (2006) Quantitative estimation of phenotypic plasticity: bridging the gap between the evolutionary concept and its ecological applications, Journal of Ecology, 94(6):1103-1116.

Usage

rdpi(data, sp, trait, factor)

Arguments

data	The dataframe that contains the data
sp	The bare (unquoted) name of the column whose values will be used as independent variable. The function will compare RDPI values among values of this variable. It can be species, provenances, etc.
trait	The bare (unquoted) name of the column that holds the trait for which to calculate RDPI. Must be numeric
factor	the bare (unquoted) name of the column that holds the environmental factor for which we will calculate RDPI. By definition, RDPI computes distances between pairs of observations that are at different levels of this factor.

Value

This function computes RDPI to the environmental factor for each species (or any other variable defined in 'sp') of the dataset Then it makes an ANOVA or t-test of the values of RDPI across species and plots the boxplot

Examples

data(ecophysio)
rdpi(ecophysio,sp,SB, Piso)

ameztegui/gradients documentation built on Nov. 2, 2019, 1:46 p.m.