getVfromE: Get vertex names from edge IDs

In brooksandrew/Rsenal: Rsenal (arsenal) of assorted R functions developed over the years

Description

Returns the vertex names associated with the specified edge IDs (FROM or TO)

Usage

getVfromE(g, eid, mode = "to", unique = T)

Arguments

g	igraph object to mine vertex names from
eid	edge IDs referenced by a numeric vector or the edge object themselves
mode	"to" or "from". Indicates whether to return vertex names for nodes going to (in) or from (out) from the edge.
unique	TRUE or FALSE. TRUE simply removes duplicate vertex names and returns a unique list.

Value

vertex names associated with the specified edge IDs (FROM or TO)

Examples

require('igraph')

## build sample network
from <- c('A','A','B','B','C','C','D','D','E','E','E','F','F','H','L','L','O')
to <- c('B','C','D','E','F','G','H','I','J','J','K','L','G','M','N','O','P')
relations<-cbind(from,to)
g <- graph.data.frame(relations)
tiers <- c(1,2,3,4,1,3,4,2,1,2,3,4,0,0,1,2)
V(g)$tier <- tiers

getVfromE(g, E(g)[1:5])
getVfromE(g, 1:5)

brooksandrew/Rsenal documentation built on May 13, 2019, 7:50 a.m.