chrobakPayneStraightLineDrawing: chrobakPayneStraightLineDrawing

Description Usage Arguments Details Value Author(s) References Examples

View source: R/interfaces.R

Description

chrobakPayneStraightLineDrawing description

Usage

1

Arguments

g

instance of class graphNEL from Bioconductor graph class

Details

M. Chrobak, T. Payne, A Linear-time Algorithm for Drawing a Planar Graph on the Grid, Information Processing Letters 54: 241-246, 1995.

Value

A matrix with rows 'x' and 'y', and columns corresponding to graph nodes.

Author(s)

Li Long <[email protected]>

References

Boost Graph Library ( www.boost.org/libs/graph/doc/index.html )

The Boost Graph Library: User Guide and Reference Manual; by Jeremy G. Siek, Lie-Quan Lee, and Andrew Lumsdaine; (Addison-Wesley, Pearson Education Inc., 2002), xxiv+321pp. ISBN 0-201-72914-8

Examples

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V <- LETTERS[1:7]
g <- new("graphNEL", nodes=V, edgemode="undirected")
g <- addEdge(V[1+0], V[1+1], g)
g <- addEdge(V[1+1], V[2+1], g)
g <- addEdge(V[1+2], V[3+1], g)
g <- addEdge(V[1+3], V[0+1], g)
g <- addEdge(V[1+3], V[4+1], g)
g <- addEdge(V[1+4], V[5+1], g)
g <- addEdge(V[1+5], V[6+1], g)
g <- addEdge(V[1+6], V[3+1], g)
g <- addEdge(V[1+0], V[4+1], g)
g <- addEdge(V[1+1], V[3+1], g)
g <- addEdge(V[1+3], V[5+1], g)
g <- addEdge(V[1+2], V[6+1], g)
g <- addEdge(V[1+1], V[4+1], g)
g <- addEdge(V[1+1], V[5+1], g)
g <- addEdge(V[1+1], V[6+1], g)

x3 <- chrobakPayneStraightLineDrawing(g)
x3
plot(t(x3))
el = edgeL(g)
for (i in seq_len(length(nodes(g)))) 
  segments(
   rep(x3["x",i], length(el[[i]]$edges)), 
   rep(x3["y",i], length(el[[i]]$edges)), 
   x3["x", nodes(g)[el[[i]]$edges]],
   x3["y", nodes(g)[el[[i]]$edges]]
  )

RBGL documentation built on May 2, 2018, 3:31 a.m.