nel2igraph function

Produce an igraph object

A function to produce an igraph object with the nodelist and edgelist , which could be returned by the function readshpnw .

nel2igraph(nodelist, edgelist, weight = NULL, eadf = NULL, Directed = FALSE)

Arguments

• nodelist: A nodelist object
• edgelist: An edgelist object
• weight: A numberic vector to weight all the edges in the edgelist , of which the length equals to the number of edges;
• eadf: A data frame of attributes corresponding to all the edges;
• Directed: TRUE if edges are directed, FALSE otherwise;

Returns

• gr: An igraph object

Details

1. The weighting vector, weight , will be used as default for any weigted calculations with edges in the igraph object.

2. The coordinate of each node is attached as attributes X and Y , which could be retrived via the function ‘get.vertex.attribute’ from the package igraph.

Examples

data(ORN)
rtNEL<-readshpnw(ORN.nt, ELComputed=TRUE)
#Add the edge length as the weight for graph
igr<-nel2igraph(rtNEL[[2]],rtNEL[[3]],weight=rtNEL[[4]])
plot(igr, vertex.label=NA, vertex.size=2,vertex.size2=2)
#plot(ORN.nt)

Author(s)

Binbin Lu binbinlu@whu.edu.cn