mRagraph {classGraph}

Construct a Laid-Out Graph for Plotting

Description

My constructor of an Ragraph object, a kind of “laid-out” graph, from package Rgraphviz. This allows more customization in plotting than just calling plot(gr, ...) for a graph object from package graph.

Usage

mRagraph(gr, lType, fixedsize = FALSE,
         fill = c("lightblue", "gray90"),
         color = c("blue3", "gray60"),
         labcol = c("blue3", "green4", "purple"))

Arguments

gr

an R object of class graph (from package graph), in our case typically the result of classTree().

lType

a string specifying the layout type, see agopen() in package Rgraphviz for the possibilities.

fixedsize

logical indicating if the ellipses should all get the same size – or should rather adapt to the situation.

fill

character vector of length 2....

color

character vector of length 2....

labcol

vector of labels to be used ....

Value

an object of class Ragraph, produced by an appropriate call to agopen.

Author(s)

Martin Maechler

See Also

the customized plotting function plotRag.

Examples

  if(require("Matrix")) {
    trMatrix <- classTree("Matrix")
    trMatrix
    RtrM <- mRagraph(trMatrix)
    RtrM # (the show method will hopefully improve)
    str(RtrM, max=2) # shows a bit more

    plot(RtrM)# 'graph' method -> using 'Rgraphviz' package
  }