https://github.com/cran/ape
Tip revision: 0ae97d685a7b98f4ea5f6f8e33881b3b32a04cba authored by Emmanuel Paradis on 28 February 2008, 00:00:00 UTC
version 2.1-2
version 2.1-2
Tip revision: 0ae97d6
zoom.R
## zoom.R (2004-12-17)
## Zoom on a Portion of a Phylogeny
## Copyright 2003-2004 Emmanuel Paradis
## This file is part of the R-package `ape'.
## See the file ../COPYING for licensing issues.
zoom <- function(phy, focus, subtree = FALSE, col = rainbow, ...)
{
if (!is.list(focus)) focus <- list(focus)
n <- length(focus)
for (i in 1:n)
if (is.character(focus[[i]]))
focus[[i]] <- which(phy$tip.label == focus[[i]])
if (is.function(col))
if (deparse(substitute(col)) == "grey")
col <- grey(1:n/n) else col <- col(n)
ext <- list()
length(ext) <- n
for (i in 1:n)
ext[[i]] <- drop.tip(phy, phy$tip.label[-focus[[i]]],
subtree = subtree)
nc <- round(sqrt(n)) + 1
nr <- ceiling(sqrt(n))
M <- matrix(0, nr, nc)
x <- c(rep(1, nr), 2:(n + 1))
M[1:length(x)] <- x
layout(M, c(1, rep(3 / (nc - 1), nc - 1)))
phy$tip.label <- rep("", length(phy$tip.label))
colo <- rep("black", dim(phy$edge)[1])
for (i in 1:n)
colo[which.edge(phy, focus[[i]])] <- col[i]
plot.phylo(phy, edge.color = colo, ...)
for (i in 1:n)
plot.phylo(ext[[i]], edge.color = col[i], ...)
}