jaccard.single: Low-level wrapper function for calculating Jaccard index...

In ctkremer/priceTools: Tools for analyzing biodiversity-ecosystem function relationships

Description

Given a list of species names and their functions, and a reference community, calculate the Jaccard index and return it. This is a low-level function used inside of higher-level functions (ie, pairwise.jaccard()) that automate the pairwise comparison of many communities. Note that if a comparison fails, NA is returned instead. So far this only seems to happen when comparisons are made between two communities each containing the same, single species.

Usage

jaccard.single(sps, func, commX)

Arguments

sps	A vector of species' names
func	A numerical vector of species' functions
commX	A reference community

Value

This function returns a matrix with a single row, and a column with the Jaccard index.

Examples

# Generate mock community data:
set.seed(36)
cm1<-data.frame(sps=LETTERS[seq(1,6)],func=rpois(6,lambda = 2))
cm2<-data.frame(sps=LETTERS[seq(1,6)],func=rpois(6,lambda = 2))

# Compare community 2's species and function lists to community 1
jaccard.single(sps=cm2$sps,func=cm2$func,commX=cm1)

ctkremer/priceTools documentation built on May 28, 2019, 7:49 p.m.