cwm {BAT} | R Documentation |
Community Weighted Mean.
Description
Average value of each of a series of traits in multiple communities.
Usage
cwm(comm, trait, abund = TRUE, na.rm = FALSE)
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. |
na.rm |
Remove NA values before calculating cwm. |
Details
Community weighted mean is used to compare communities in terms of their "typical" trait values.
Value
A sites x trait matrix with mean value per site and trait.
Examples
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 <- data.frame(Trait1 = c(1,0,0,2,0), Trait2 = c(rep("A",2), rep("B",3)))
rownames(trait) = colnames(comm)
cwm(comm, trait)
cwm(comm, trait, FALSE)
[Package BAT version 2.9.6 Index]