尽管上面的响应能够添加中断，但这些实际上并不是minor_breaks，为此您可以使用annotation_ticks函数，它的工作原理与 annotation_logticks.
代码功能在这里可用。您可能需要加载grid包
annotation_ticks <- function(sides = "b",
scale = "identity",
scaled = TRUE,
short = unit(0.1, "cm"),
mid = unit(0.2, "cm"),
long = unit(0.3, "cm"),
colour = "black",
size = 0.5,
linetype = 1,
alpha = 1,
color = NULL,
ticks_per_base = NULL,
...) {
if (!is.null(color)) {
colour <- color
}
# check for invalid side
if (grepl("[^btlr]", sides)) {
stop(gsub("[btlr]", "", sides), " is not a valid side: b,t,l,r are valid")
}
# split sides to character vector
sides <- strsplit(sides, "")[[1]]
if (length(sides) != length(scale)) {
if (length(scale) == 1) {
scale <- rep(scale, length(sides))
} else {
stop("Number of scales does not match the number of sides")
}
}
base <- sapply(scale, function(x) switch(x, "identity" = 10, "log10" = 10, "log" = exp(1)), USE.NAMES = FALSE)
if (missing(ticks_per_base)) {
ticks_per_base <- base - 1
} else {
if ((length(sides) != length(ticks_per_base))) {
if (length(ticks_per_base) == 1) {
ticks_per_base <- rep(ticks_per_base, length(sides))
} else {
stop("Number of ticks_per_base does not match the number of sides")
}
}
}
delog <- scale %in% "identity"
layer(
data = data.frame(x = NA),
mapping = NULL,
stat = StatIdentity,
geom = GeomTicks,
position = PositionIdentity,
show.legend = FALSE,
inherit.aes = FALSE,
params = list(
base = base,
sides = sides,
scaled = scaled,
short = short,
mid = mid,
long = long,
colour = colour,
size = size,
linetype = linetype,
alpha = alpha,
ticks_per_base = ticks_per_base,
delog = delog,
...
)
)
}
#' Base ggproto classes for ggplot2
#'
#' If you are creating a new geom, stat, position, or scale in another package,
#' you'll need to extend from ggplot2::Geom, ggplot2::Stat, ggplot2::Position, or ggplot2::Scale.
#'
#' @seealso \code{\link[ggplot2]{ggplot2-ggproto}}
#' @usage NULL
#' @format NULL
#' @rdname ggplot2-ggproto
#' @export
GeomTicks <- ggproto(
"GeomTicks", Geom,
extra_params = "",
handle_na = function(data, params) {
data
},
draw_panel = function(data,
panel_scales,
coord,
base = c(10, 10),
sides = c("b", "l"),
scaled = TRUE,
short = unit(0.1, "cm"),
mid = unit(0.2, "cm"),
long = unit(0.3, "cm"),
ticks_per_base = base - 1,
delog = c(x = TRUE, y = TRUE)) {
ticks <- list()
# Convert these units to numbers so that they can be put in data frames
short <- convertUnit(short, "cm", valueOnly = TRUE)
mid <- convertUnit(mid, "cm", valueOnly = TRUE)
long <- convertUnit(long, "cm", valueOnly = TRUE)
for (s in 1:length(sides)) {
if (grepl("[b|t]", sides[s])) {
# Get positions of x tick marks
xticks <- calc_ticks(
base = base[s],
minpow = floor(panel_scales$x.range[1]),
maxpow = ceiling(panel_scales$x.range[2]),
majorTicks = panel_scales$x.major_source,
start = 0,
shortend = short,
midend = mid,
longend = long,
ticks_per_base = ticks_per_base[s],
delog = delog[s]
)
if (scaled) {
if (!delog[s]) {
xticks$value <- log(xticks$value, base[s])
}
}
names(xticks)[names(xticks) == "value"] <- "x" # Rename to 'x' for coordinates$transform
xticks <- coord$transform(xticks, panel_scales)
# Make the grobs
if (grepl("b", sides[s])) {
ticks$x_b <- with(
data,
segmentsGrob(
x0 = unit(xticks$x, "native"),
x1 = unit(xticks$x, "native"),
y0 = unit(xticks$start, "cm"),
y1 = unit(xticks$end, "cm"),
gp = gpar(
col = alpha(colour, alpha),
lty = linetype,
lwd = size * .pt
)
)
)
}
if (grepl("t", sides[s])) {
ticks$x_t <- with(
data,
segmentsGrob(
x0 = unit(xticks$x, "native"),
x1 = unit(xticks$x, "native"),
y0 = unit(1, "npc") - unit(xticks$start, "cm"),
y1 = unit(1, "npc") - unit(xticks$end, "cm"),
gp = gpar(
col = alpha(colour, alpha),
lty = linetype,
lwd = size * .pt
)
)
)
}
}
if (grepl("[l|r]", sides[s])) {
yticks <- calc_ticks(
base = base[s],
minpow = floor(panel_scales$y.range[1]),
maxpow = ceiling(panel_scales$y.range[2]),
majorTicks = panel_scales$y.major_source,
start = 0,
shortend = short,
midend = mid,
longend = long,
ticks_per_base = ticks_per_base[s],
delog = delog[s]
)
if (scaled) {
if (!delog[s]) {
yticks$value <- log(yticks$value, base[s])
}
}
names(yticks)[names(yticks) == "value"] <- "y" # Rename to 'y' for coordinates$transform
yticks <- coord$transform(yticks, panel_scales)
# Make the grobs
if (grepl("l", sides[s])) {
ticks$y_l <- with(
data,
segmentsGrob(
y0 = unit(yticks$y, "native"),
y1 = unit(yticks$y, "native"),
x0 = unit(yticks$start, "cm"),
x1 = unit(yticks$end, "cm"),
gp = gpar(
col = alpha(colour, alpha),
lty = linetype, lwd = size * .pt
)
)
)
}
if (grepl("r", sides[s])) {
ticks$y_r <- with(
data,
segmentsGrob(
y0 = unit(yticks$y, "native"),
y1 = unit(yticks$y, "native"),
x0 = unit(1, "npc") - unit(yticks$start, "cm"),
x1 = unit(1, "npc") - unit(yticks$end, "cm"),
gp = gpar(
col = alpha(colour, alpha),
lty = linetype,
lwd = size * .pt
)
)
)
}
}
}
gTree(children = do.call("gList", ticks))
},
default_aes = aes(colour = "black", size = 0.5, linetype = 1, alpha = 1)
)
# Calculate the position of log tick marks Returns data frame with: - value: the
# position of the log tick on the data axis, for example 1, 2, ..., 9, 10, 20, ...
# - start: on the other axis, start position of the line (usually 0) - end: on the
# other axis, end position of the line (for example, .1, .2, or .3)
calc_ticks <- function(base = 10,
ticks_per_base = base - 1,
minpow = 0,
maxpow = minpow + 1,
majorTicks = 0,
start = 0,
shortend = 0.1,
midend = 0.2,
longend = 0.3,
delog = FALSE) {
# Number of blocks of tick marks
reps <- maxpow - minpow
# For base 10: 1, 2, 3, ..., 7, 8, 9, 1, 2, ...
ticknums <- rep(seq(1, base - 1, length.out = ticks_per_base), reps)
# For base 10: 1, 1, 1, ..., 1, 1, 1, 2, 2, ... (for example)
powers <- rep(seq(minpow, maxpow - 1), each = ticks_per_base)
ticks <- ticknums * base ^ powers
ticks <- c(ticks, base ^ maxpow) # Add the last tick mark
# Set all of the ticks short
tickend <- rep(shortend, length(ticks))
# Get the position within each cycle, 0, 1, 2, ..., 8, 0, 1, 2. ...
cycleIdx <- ticknums - 1
# Set the 'major' ticks long
tickend[cycleIdx == 0] <- longend
# Where to place the longer tick marks that are between each base For base 10, this
# will be at each 5
longtick_after_base <- floor(ticks_per_base / 2)
tickend[cycleIdx == longtick_after_base] <- midend
if (delog) {
ticksCopy <- ticks
regScale <- log(ticks, base)
majorTicks <- sort(
unique(
c(
minpow,
regScale[which(regScale %in% majorTicks)],
maxpow,
majorTicks
)
)
)
expandScale <- c()
if (length(majorTicks) > 1) {
for (i in 1:(length(majorTicks) - 1)) {
expandScale <- c(
expandScale,
seq(majorTicks[i], majorTicks[i + 1], length.out = (ticks_per_base + 1))
)
}
ticks <- unique(expandScale)
# Set all of the ticks short
tickend <- rep(shortend, length(ticks))
# Set the 'major' ticks long
tickend[which(ticks %in% majorTicks)] <- longend
}
}
tickdf <- data.frame(value = ticks, start = start, end = tickend)
tickdf
}
