Class "Ragraph": A class to handle libgraph representations

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Description

Class Ragraph is used to handle libgraph representations of R graph objects.

Objects from the Class

Objects can be created by calls to the function agopen.

Slots

agraph:

Object of class "externalptr": A C based structure containing the libgraph information

laidout:

Object of class "logical": Whether or not this graph has been laid out or not.

layoutType:

Object of class "character": The layout method used for this object

edgemode:

Object of class "character": The edgemode for this graph - “directed” or “undirected”

AgNode:

Object of class "list": A list of AgNode objects.

AgEdge:

Object of class "list": A list of AgEdge objects.

boundBox:

Object of class "boundBox": Defines the bounding box of the plot.

bg:

Object of class "character": The background color.

fg:

Object of class "character": The foreground color.

Methods

show

signature(object = "Ragraph"): A brief summary of the contents

agraph

signature(object = "Ragraph"): Returns the external libgraph pointer

laidout

signature(object = "Ragraph"): Returns the laidout slot

boundBox

signature(object = "Ragraph"): Returns the bounding box.

AgEdge

signature(object = "Ragraph"): Returns the edge list.

AgNode

signature(object = "Ragraph"): Returns the node list.

edgemode

signature(object = "Ragraph"): Retrieves the edgemode of this object.

layoutType

signature(object = "Ragraph"): Retrieves the method used for the layout of this graph.

edgeNames

signature(object = "Ragraph"): Returns a vector of the names of the edges in this graph.

graphDataDefaults

signature(self= "Ragraph"): Gets default attributes of the given graph.

graphDataDefaults<-

signature(self= "Ragraph", attr="vector", value="vector"): Sets default attributes of the given graph.

graphData

signature(self= "Ragraph", attr="vector"): Gets attributes of the given graph.

graphData<-

signature(self= "Ragraph", attr="vector", value="vector"): Sets attributes of the given graph.

clusterData

signature(self= "Ragraph", cluster="numeric", attr="vector"): Gets attributes of a cluster for the given graph.

clusterData<-

signature(self= "Ragraph", cluster="numeric", attr="vector", value="vector"): Sets attributes of a cluster for the given graph.

edgeDataDefaults

signature(self= "Ragraph",attr="missing"): Gets default attributes of the given edge.

edgeDataDefaults<-

signature(self= "Ragraph", attr="vector", value="vector"): Sets default attributes of the given edge.

edgeData

signature(self= "Ragraph", from="vector", to="vector", attr="vector"): Gets attributes of the given edge.

edgeData<-

signature(self= "Ragraph", from="vector", to="vector", attr="vector", value="vector"): Sets attributes of the given edge.

nodeDataDefaults

signature(self= "Ragraph",attr="missing"): Gets default attributes of the given node.

nodeDataDefaults<-

signature(self= "Ragraph", attr="vector", value="vector"): Sets default attributes of the given node.

nodeData

signature(self= "Ragraph", n="vector", attr="vector"): Gets attributes of the given node.

nodeData<-

signature(self= "Ragraph", n="vector", attr="vector", value="vector"): Sets attributes of the given node.

getNodeXY

signature(object = "Ragraph"): Returns a two element list, the first element contains a numerical vector with the 'x' positions of every node in this graph, and the second element contains a numerical vector with the 'y' positions for every node in the graph.

getNodeHeight

signature(object = "Ragraph"): Returns a vector with the heights of every node in the graph

getNodeLW

signature(object = "Ragraph"): Returns a vector with the left width of every node in the graph.

getNodeRW

signature(object = "Ragraph"): Returns a vector with the right width of every node in the graph.

Author(s)

Jeff Gentry and Li Long <li.long@isb-sib.ch>

See Also

agopen

Examples

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set.seed(123)
V <- letters[1:10]
M <- 1:4
g1 <- randomGraph(V, M, .2)
z <- agopen(g1,"foo")
z

## The various methods in action

## These methods are all used to obtain positional information about nodes
getNodeXY(z)
getNodeHeight(z)
getNodeLW(z)
getNodeRW(z)

## Retrieve information about the edges in the graph
edgeNames(z)
edgemode(z)

## These get information about the layout
laidout(z)
layoutType(z)
boundBox(z)

## Used to retrieve the entire list of edges or nodes
AgEdge(z)
AgNode(z)

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