BAT (version 2.1.1)

cwm: Community Weighted Mean.

Description

Average value of each of a series of traits in multiple communities.

Usage

cwm(comm, trait, abund = TRUE)

Arguments

comm

A sites x species matrix, with incidence or abundance data about the species in the community.

trait

A species x traits matrix, with trait values for each species in comm.

abund

A boolean (T/F) indicating whether abundance data should be used (TRUE) or converted to incidence (FALSE) before analysis. If not specified, default is TRUE.

Value

A sites x trait matrix with mean value per site.

Details

Community weighted mean is used to compare communities in terms of their "typical" trait values.

Examples

# NOT RUN {
comm <- matrix(c(2,5,0,0,0,1,1,0,0,0,0,1,2,0,0,0,0,0,10,1), nrow = 4, ncol = 5, byrow = TRUE)
rownames(comm) = c("Site1","Site2","Site3","Site4")
colnames(comm) = c("Sp1","Sp2","Sp3","Sp4","Sp5")
trait <- matrix(c(1,1,0,0,0,0,2,1,0,0,0,0,2,1,0,0,0,0,2,1), nrow = 5, ncol = 4, byrow = TRUE)
rownames(trait) = colnames(comm)
colnames(trait) = c("Trait1","Trait2","Trait3","Trait4")
cwm(comm, trait)
cwm(comm, trait, FALSE)
# }