This is my script:
Madr<-read.csv("MadRegSppSite.csv", sep=",", row.names=1)
rownames(Madr) <- Madr[,1]
Madr <- Madr[,-1]
MadrJaccard<-vegdist(Madr, method="jaccard",binary=FALSE)
MadrJaccard<-as.matrix(dist(MadrJaccard))
write.table(MadrJaccard,file="MadrJaccard.csv",sep=",",row.names=T)
The input file is a binary matrix of presence absence of species organized
in rows, and sites in the first column.
The script is running fine but when I open it in excel (MadrJaccard) the
Jaccard values are between 0 and 4 when the range of values is only supposed
to be between 0 and 1.
I cannot figure out what is going on, does anyone have any ideas?