## ltt.plot.R (2009-05-10)
## Lineages Through Time Plot
## Copyright 2002-2009 Emmanuel Paradis
## This file is part of the R-package `ape'.
## See the file ../COPYING for licensing issues.
ltt.plot <- function(phy, xlab = "Time", ylab = "N", ...)
{
if (!inherits(phy, "phylo")) stop('object "phy" is not of class "phylo"')
if (!is.binary.tree(phy)) phy <- multi2di(phy)
time <- sort(branching.times(phy), decreasing = TRUE)
N <- 1:(length(time) + 1)
plot.default(-c(time, 0), N, xlab = xlab, ylab = ylab,
xaxs = "r", yaxs = "r", type = "S", ...)
}
ltt.lines <- function(phy, ...)
{
if (!is.binary.tree(phy)) phy <- multi2di(phy)
time <- sort(branching.times(phy), decreasing = TRUE)
N <- 1:(length(time) + 1)
lines(-c(time, 0), N, type = "S", ...)
}
mltt.plot <- function(phy, ..., dcol = TRUE, dlty = FALSE, legend = TRUE,
xlab = "Time", ylab = "N", log = "")
{
ltt.xy <- function(phy) {
if (!is.binary.tree(phy)) phy <- multi2di(phy)
x <- -c(sort(branching.times(phy), decreasing = TRUE), 0)
names(x) <- NULL
y <- 1:length(x)
cbind(x, y)
}
if (inherits(phy, "phylo")) { # if a tree of class "phylo"
TREES <- list(ltt.xy(phy))
names(TREES) <- deparse(substitute(phy))
} else { # a list of trees
TREES <- lapply(phy, ltt.xy)
names(TREES) <- names(phy)
if (is.null(names(TREES)))
names(TREES) <-
paste(deparse(substitute(phy)), "-", 1:length(TREES))
}
dts <- list(...)
n <- length(dts)
if (n) {
mc <- as.character(match.call())[-(1:2)]
nms <- mc[1:n]
for (i in 1:n) {
if (class(dts[[i]]) == "phylo") {
a <- list(ltt.xy(dts[[i]]))
names(a) <- nms[i]
} else { # a list of trees
a <- lapply(dts[[i]], ltt.xy)
names(a) <- names(dts[[i]])
if (is.null(names(a)))
names(a) <-
paste(deparse(substitute(phy)), "-", 1:length(a))
}
TREES <- c(TREES, a)
}
}
n <- length(TREES)
xl <- c(min(unlist(lapply(TREES, function(x) min(x[, 1])))), 0)
yl <- c(1, max(unlist(lapply(TREES, function(x) max(x[, 2])))))
plot.default(1, 1, type = "n", xlim = xl, ylim = yl, xaxs = "r",
yaxs = "r", xlab = xlab, ylab = ylab, log = log)
lty <- if (!dlty) rep(1, n) else 1:n
col <- if (!dcol) rep(1, n) else topo.colors(n)
for (i in 1:n)
lines(TREES[[i]], col = col[i], lty = lty[i], type = "S")
if (legend)
legend(xl[1], yl[2], legend = names(TREES),
lty = lty, col = col, bty = "n")
}
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