arcdiagram (version 0.1.11)

node_coords: Node Coordinates

Description

Computes axis locations of each node. This function can be helpful when you want to separately plot the node labels using the function mtext.

Usage

node_coords(edgelist, sorted = FALSE, decreasing = FALSE, ordering = NULL, labels = NULL)

Arguments

edgelist

basically a two-column matrix with edges (see graph)

sorted

logical to indicate if nodes should be sorted

decreasing

logical to indicate type of sorting (used only when sorted=TRUE)

ordering

optional numeric vector providing the ordering of nodes (when provided, this parameter overrides sorted=TRUE)

labels

character vector with labels for the nodes

Value

a vector with the location of nodes in the x-axis

See Also

arcplot

Examples

## Not run: 
#  # generate a graph
#  some_graph = graph.ring(10)
# 
#  # add names to nodes
#  V(some_graph)$name = letters[1:vcount(some_graph)]
# 
#  # extract edgelist
#  edgelist = get.edgelist(some_graph)
# 
#  # (default) arc diagram
#  arcplot(edgelist, labels=V(some_graph)$name, las=1)
# 
#  # get x-axis coordinates of nodes
#  xcoords = node_coords(edgelist, labels=V(some_graph)$name)
# 
#  # arc diagram with various labels
#  arcplot(edgelist, show.labels=FALSE, show.nodes=TRUE)
#  mtext(V(some_graph)$name, side=1, line=0, at=xcoords)
#  mtext(rep("node",10), side=1, line=1, at=xcoords, col="gray90")
#  ## End(Not run)