The function is used to calculate the coordinates and area of each convex hull from E environmental space to SR subniche.
an object of class
The convex hulls measured are :
E is the environmental space.
K the sub-environmental space.
NR the realized subniche.
SP the existing fundamental subniche.
SB the area of the biological constraint reducing SP.
SR the species realized subniche.
See doi: 10.7717/peerj.3364 for more details on the subniche concept.
A list containing the coordinates and area of each convex hulls
Karasiewicz S.,Doledec S.and Lefebvre S. (2017). Within outlying mean indexes: refining the OMI analysis for the realized niche decomposition. PeerJ 5:e3364. doi: 10.7717/peerj.3364.
library(subniche) data(doubs) dudi1 <- dudi.pca(doubs$env, scale = TRUE, scan = FALSE, nf = 3) nic1 <- niche(dudi1, doubs$fish, scann = FALSE) # number of sites N <- dim(nic1$ls) #Create a factor which defines the subsets fact <- factor(c(rep(1,N/2),rep(2,N/2))) # nic1 will be use as reference and fact will be use to define the subniches environment subnic1 <- subniche(nic1, fact) area_sub <- subarea(subnic1)
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