chrobakPayneStraightLineDrawing
chrobakPayneStraightLineDrawing description
chrobakPayneStraightLineDrawing(g)
g |
instance of class graphNEL from Bioconductor graph class |
M. Chrobak, T. Payne, A Linear-time Algorithm for Drawing a Planar Graph on the Grid, Information Processing Letters 54: 241-246, 1995.
A matrix with rows 'x' and 'y', and columns corresponding to graph nodes.
Li Long <li.long@isb-sib.ch>
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
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]]
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