class2Graph: Build the Graph of Super Classes from an S4 Class Definition

Description

From an S4 class definition class, computes the graph of all super classes, i.e., of all classes that class extends.

Usage

class2Graph(class, fullNames = TRUE, simpleOnly = FALSE,
            bottomUp = FALSE, package = class@package)

Value

an R object inheriting from class graph.

Arguments

class: class name
fullNames: logical indicating if full name should be applied....
simpleOnly: logical, simply passed to getAllSuperClasses(..).
bottomUp: logical indicating the direction of the graph.
package: package where the super classes should be gotten from.

Author

Robert Gentleman (original code) and Martin Maechler

Examples

Run this code

require("graph")
cg <- class2Graph("graphNEL") # simple :  graphNEL |-> graph
plot(cg)

if(require("Matrix")) {
   cg2 <- class2Graph("dgCMatrix")
   as(cg2, "sparseMatrix")
   plot(cg2)
   ## alternative: don't show the initial "Matrix:"
   cg2. <- class2Graph("dgCMatrix", fullNames=FALSE)
   plot(cg2.)
   ## 'simpleOnly' does not change anything here :
   stopifnot(identical(cg2.,
          class2Graph("dgCMatrix", fullNames=FALSE, simpleOnly = TRUE)))


   ## very simple, since "sparseMatrix" only extends "Matrix" :
   cg3 <- class2Graph("sparseMatrix")
   plot(cg3)
}