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edges draws edges on a plotted tree. fancyarrows
enhances arrows with triangle and harpoon
heads; it can be called from edges.
edges(nodes0, nodes1, arrows = 0, type = "classical", ...)
fancyarrows(x0, y0, x1, y1, length = 0.25, angle = 30, code = 2,
col = par("fg"), lty = par("lty"), lwd = par("lwd"),
type = "triangle", ...)vectors of integers giving the tip and/or node numbers where to start and to end the edges (eventually recycled).
an integer between 0 and 3; 0: lines (the default); 1:
an arrow head is drawn at nodes0; 2: at nodes1; 3:
both.
if the previous argument is not 0, the type of arrow head:
"classical" (just lines, the default), "triangle",
"harpoon", or any unambiguous abbreviations of these. For
fancyarrows only the last two are available.
the coordinates of the start and end points for
fancyarrows (these are not recycled and so should be vectors
of the same length).
default options similar to
those of arrows.
further arguments passed to segments.
The first function is helpful when drawing reticulations on a phylogeny, especially if computed from the edge matrix.
# NOT RUN {
set.seed(2)
tr <- rcoal(6)
plot(tr, "c")
edges(10, 9, col = "red", lty = 2)
edges(10:11, 8, col = c("blue", "green")) # recycling of 'nodes1'
edges(1, 2, lwd = 2, type = "h", arrows = 3, col = "green")
nodelabels()
# }
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