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## cophyloplot.R (2014-04-07)
## Plots two phylogenetic trees face to
## face with the links between the tips
## Copyright 2008-2010 Damien de Vienne
## This file is part of the R-package `ape'.
## See the file ../COPYING for licensing issues.
cophyloplot <-
function(x, y, assoc = NULL, use.edge.length = FALSE, space = 0,
length.line = 1, gap = 2, type = "phylogram", rotate = FALSE,
col = par("fg"), lwd = par("lwd"), lty = par("lty"),
show.tip.label = TRUE, font = 3, ...)
{
if (is.null(assoc)) {
assoc <- matrix(ncol = 2)
print("No association matrix specified. Links will be omitted.")
}
if (rotate == TRUE) {
cat("\n Click on a node to rotate (right click to exit)\n\n")
repeat {
res <- plotCophylo2(x, y, assoc = assoc, use.edge.length = use.edge.length,
space = space, length.line = length.line, gap = gap,
type = type, return = TRUE, col = col, lwd=lwd, lty=lty, show.tip.label = show.tip.label,
font = font)
click <- identify(res$c[, 1], res$c[, 2], n = 1)
if (click < length(res$a[, 1]) + 1) {
if (click > res$N.tip.x)
x <- rotate(x, click)
} else if (click < length(res$c[, 1]) + 1) {
if (click > length(res$a[, 1]) + res$N.tip.y)
y <- rotate(y, click - length(res$a[, 1]))
}
}
on.exit(cat("done\n"))
}
else plotCophylo2(x, y, assoc = assoc, use.edge.length = use.edge.length,
space = space, length.line = length.line, gap = gap,
type = type, return = FALSE, col = col, lwd=lwd, lty=lty, show.tip.label = show.tip.label, font = font)
}
plotCophylo2 <-
function(x, y, assoc = assoc, use.edge.length = use.edge.length,
space = space, length.line = length.line, gap = gap,
type = type, return = return, col = col, lwd=lwd, lty=lty,
show.tip.label = show.tip.label,
font = font, ...)
{
res <- list()
###choice of the minimum space between the trees
left <- max(nchar(x$tip.label, type = "width")) + length.line
right <- max(nchar(y$tip.label, type = "width")) + length.line
space.min <- left + right + gap * 2
if ((space <= 0) || (space < space.min)) space <- space.min
N.tip.x <- Ntip(x)
N.tip.y <- Ntip(y)
res$N.tip.x <- N.tip.x
res$N.tip.y <- N.tip.y
a <- plotPhyloCoor(x, use.edge.length = use.edge.length, type = type)
res$a <- a
b <- plotPhyloCoor(y, use.edge.length = use.edge.length,
direction = "leftwards", type = type)
###for the two trees to have the extreme leaves at the same ordinate.
a[, 2] <- a[, 2] - min(a[, 2])
b[, 2] <- b[, 2] - min(b[, 2])
res$b <- b
b2 <- b
b2[, 1] <- b[1:nrow(b), 1] * (max(a[, 1])/max(b[, 1])) +
space + max(a[, 1])
b2[, 2] <- b[1:nrow(b), 2] * (max(a[, 2])/max(b[, 2]))
res$b2 <- b2
c <- matrix(ncol = 2, nrow = nrow(a) + nrow(b))
c[1:nrow(a), ] <- a[1:nrow(a), ]
c[nrow(a) + 1:nrow(b), 1] <- b2[, 1]
c[nrow(a) + 1:nrow(b), 2] <- b2[, 2]
res$c <- c
plot(c, type = "n", xlim = NULL, ylim = NULL, log = "", main = NULL,
sub = NULL, xlab = NULL, ylab = NULL, ann = FALSE, axes = FALSE,
frame.plot = FALSE)
###segments for cladograms
if (type == "cladogram") {
for (i in 1:(nrow(a) - 1)) segments(a[x$edge[i, 1], 1],
a[x$edge[i, 1], 2], a[x$edge[i, 2], 1], a[x$edge[i,
2], 2], col="red")
for (i in 1:(nrow(b) - 1))
segments(b2[y$edge[i, 1], 1], b2[y$edge[i, 1], 2],
b2[y$edge[i, 2], 1], b2[y$edge[i, 2], 2])
}
###segments for phylograms
if (type == "phylogram") {
for (i in (N.tip.x + 1):nrow(a)) {
l <- length(x$edge[x$edge[, 1] == i, ][, 1])
for (j in 1:l) {
segments(a[x$edge[x$edge[, 1] == i, ][1, 1],
1], a[x$edge[x$edge[, 1] == i, 2], 2][1], a[x$edge[x$edge[,
1] == i, ][1, 1], 1], a[x$edge[x$edge[, 1] ==
i, 2], 2][j])
segments(a[x$edge[x$edge[, 1] == i, ][1, 1],
1], a[x$edge[x$edge[, 1] == i, 2], 2][j], a[x$edge[x$edge[,
1] == i, 2], 1][j], a[x$edge[x$edge[, 1] ==
i, 2], 2][j])
}
}
for (i in (N.tip.y + 1):nrow(b)) {
l <- length(y$edge[y$edge[, 1] == i, ][, 1])
for (j in 1:l) {
segments(b2[y$edge[y$edge[, 1] == i, ][1, 1],
1], b2[y$edge[y$edge[, 1] == i, 2], 2][1],
b2[y$edge[y$edge[, 1] == i, ][1, 1], 1], b2[y$edge[y$edge[,
1] == i, 2], 2][j])
segments(b2[y$edge[y$edge[, 1] == i, ][1, 1],
1], b2[y$edge[y$edge[, 1] == i, 2], 2][j],
b2[y$edge[y$edge[, 1] == i, 2], 1][j], b2[y$edge[y$edge[,
1] == i, 2], 2][j])
}
}
}
if (show.tip.label) {
text(a[1:N.tip.x, ], cex = 0, font = font, pos = 4,
labels = x$tip.label)
text(b2[1:N.tip.y, ], cex = 1, font = font, pos = 2,
labels = y$tip.label)
}
###links between associated taxa. Takes into account the size of the character strings of the taxa names.
lsa <- 1:N.tip.x
lsb <- 1:N.tip.y
decx <- array(nrow(assoc))
decy <- array(nrow(assoc))
#colors
if (length(col)==1) colors<-c(rep(col, nrow(assoc)))
else if (length(col)>=nrow(assoc)) colors<-col
else colors<-c(rep(col, as.integer(nrow(assoc)/length(col))+1))
#lwd
if (length(lwd)==1) lwidths<-c(rep(lwd, nrow(assoc)))
else if (length(lwd)>=nrow(assoc)) lwidths<-lwd
else lwidths<-c(rep(lwd, as.integer(nrow(assoc)/length(lwd))+1))
#lty
if (length(lty) == 1) ltype <- c(rep(lty, nrow(assoc)))
else if (length(lty) >= nrow(assoc)) ltype <- lty
else ltype <- c(rep(lty, as.integer(nrow(assoc)/length(lty))+1))
for (i in 1:nrow(assoc)) {
if (show.tip.label) {
decx[i] <- strwidth(x$tip.label[lsa[x$tip.label == assoc[i, 1]]])
decy[i] <- strwidth(y$tip.label[lsb[y$tip.label == assoc[i, 2]]])
} else {
decx[i] <- decy[i] <- 0
}
if (length.line) { # added by EP (2014-04-07)
segments(a[lsa[x$tip.label == assoc[i, 1]], 1] + decx[i] + gap,
a[lsa[x$tip.label == assoc[i, 1]], 2],
a[lsa[x$tip.label == assoc[i, 1]], 1] + gap + left,
a[lsa[x$tip.label == assoc[i, 1]], 2],
col = colors[i], lwd = lwidths[i], lty = ltype[i])
segments(b2[lsb[y$tip.label == assoc[i, 2]], 1] - (decy[i] + gap),
b2[lsb[y$tip.label == assoc[i, 2]], 2],
b2[lsb[y$tip.label == assoc[i, 2]], 1] - (gap + right),
b2[lsb[y$tip.label == assoc[i, 2]], 2],
col = colors[i], lwd = lwidths[i], lty = ltype[i])
}
segments(a[lsa[x$tip.label == assoc[i, 1]], 1] + gap + left,
a[lsa[x$tip.label == assoc[i, 1]], 2],
b2[lsb[y$tip.label == assoc[i, 2]], 1] - (gap + right),
b2[lsb[y$tip.label == assoc[i, 2]], 2],
col = colors[i], lwd = lwidths[i], lty = ltype[i])
}
if (return == TRUE) return(res)
}
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