find.ranks: make food trophic ranks for all the species in the matrix for...

In loop: loop decomposition of weighted directed graphs for life cycle analysis, providing flexbile network plotting methods, and analyzing food chain properties in ecology

Description

it will return trophic ranks of species in the food webs

Usage

find.ranks(gemat, converted = TRUE)

Arguments

gemat	gemat is a square matrix
converted	if TRUE, resultant trophic ranks of species will be converted to a list, which is the input format for fplot.foodweb() function; if FALSE, resultant trophic ranks of species are present in a vector default is TRUE

Value

it will return a list (converted=TRUE), each list represent one trophic rank, the elements of which are the species being classified into the rank. it can also return a vector (converted=FALSE), each element denote the rank of the species.

Author(s)

Youhua Chen <[e-mail]>

References

Chen Y (2012) loop: an R package for performing decomposition of weighted directed graphs, food web analysis and flexible network plotting. Submitted.

See Also

fplot.foodweb

Examples

gemat<-matrix(c(0,5,3,7,0,5,0,8,0,4,3,8,0,1,6,7,0,1,0,2,0,4,6,2,0),5,5)
ranks<-find.ranks(gemat)
fplot.foodweb(gemat=gemat,ranks=ranks,addlabels=TRUE,bg="white",pch=21,pcex=4,lcol=2,weighted=FALSE)

loop documentation built on May 2, 2019, 9:07 a.m.