Class dg.ExtraEdge
The class for the edges between vertices and extra vertices.
vertex.indices:Object of class "numeric",
see "dg.Edge".
If the index is positiv then the node is a vertex,
else it is the extra vertex.
width:Object of class "numeric",
see "dg.Edge".
dash:Object of class "character",
see "dg.Edge".
color:Object of class "character",
see "dg.Edge".
label:Object of class "character",
see "dg.Edge".
label.position:Object of class "numeric",
see "dg.Edge".
Class "dg.Edge", directly.
Class "dg.Node", directly.
signature(object = "dg.ExtraEdge"):
Extract the types ("super classes": "Vertex" or "Extra")
of the vertices (nodes) of the edge.
The method new also accepts the argument vertices or
vertexList. The label is then extracted from these vertices.
The length of vertices should match vertex.indices, where
vertex.indices is used to select vertices form vertexList.
Extra vertices and nodes are used in demo(dg.USArrests)
to display the loadings in a biplot.
Jens Henrik Badsberg
vertices <- returnVertexList(paste("V", 1:4, sep = ""))
extra <- returnVertexList(paste("E", 1:4, sep = ""))
extraedge <- new("dg.ExtraEdge", vertex.indices = c(3, -2),
vertices = new("dg.VertexList",
c(vertices[3], extra[2])))
str(extraedge)
color(extraedge)
label(extraedge)
labelPosition(extraedge)
width(extraedge)
nodeIndicesOfEdge(extraedge)
nodeTypesOfEdge(extraedge)
color(extraedge) <- "Black"
label(extraedge) <- "Gryf"
labelPosition(extraedge) <- c(0, 1, 2)
width(extraedge) <- 1
nodeIndicesOfEdge(extraedge) <- c(1, -1)
str(extraedge)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.