forestSAS (version 1.0.1)

differ: A forest spatial structure index characterizing differation degree of tree attributies.

Description

Analyze the differation degree of tree attributies in a neighborhood unit according to the characteristics of the tree attributies,such as forest storey,speices,etc.in spatial micro-environment.which clearly define the differation degree of tree attributies for a reference tree and its four nearest neighbors.

Usage

differ(x)

Arguments

x

A vector composed by 5 tree attributies.

Value

Result will retrun five values,0,0.25,0.5,0.75,1,which means one, two, three, four or five different attributies of nearest neighbors for reference tree,respectively.

References

None

Examples

# NOT RUN {
##S1,S2,S3,S4,S5,represent 5 different forest stoeries
storey1<-c("S1","S1","S1","S1","S1")
storey2<-c("S1","S1","S1","S1","S2")
storey3<-c("S1","S1","S1","S3","S2")
storey4<-c("S1","S1","S4","S3","S2")
storey5<-c("S1","S5","S4","S3","S2")

differ1<-differ(storey1)
differ1
differ2<-differ(storey2)
differ2
differ3<-differ(storey3)
differ3
differ4<-differ(storey4)
differ4
differ5<-differ(storey5)
differ5
# }