uaktualniającymi ggplot2 v2.0.0 i directlabels v2015.12.16
Jednym ze sposobów jest zmiana metody direct.label. Nie ma zbyt wielu innych dobrych opcji do etykietowania linii, ale istnieje możliwość, że istnieje angled.boxes.
gg <- ggplot(fit2,
aes(x = hincome, y = Probability, colour = Participation)) +
facet_grid(. ~ children, labeller = label_both) +
geom_line(size = 2) + theme_bw()
direct.label(gg, method = list(box.color = NA, "angled.boxes"))
LUB
ggplot(fit2, aes(x = hincome, y = Probability, colour = Participation, label = Participation)) +
facet_grid(. ~ children, labeller = label_both) +
geom_line(size = 2) + theme_bw() + scale_colour_discrete(guide = 'none') +
geom_dl(method = list(box.color = NA, "angled.boxes"))
odpowiedź Original
Jednym ze sposobów jest zmiana sposobu direct.label „s. Nie ma zbyt wielu innych dobrych opcji do etykietowania linii, ale istnieje możliwość, że istnieje angled.boxes. Niestety, angled.boxes nie działa po wyjęciu z pudełka. Funkcja far.from.others.borders() musi zostać załadowana, a ja zmodyfikowałem inną funkcję, draw.rects(), aby zmienić kolor granic pola na NA. (Obie funkcje są available here.)
(lub dostosowanie odpowiedzi from here)
## Modify "draw.rects"
draw.rects.modified <- function(d,...){
if(is.null(d$box.color))d$box.color <- NA
if(is.null(d$fill))d$fill <- "white"
for(i in 1:nrow(d)){
with(d[i,],{
grid.rect(gp = gpar(col = box.color, fill = fill),
vp = viewport(x, y, w, h, "cm", c(hjust, vjust), angle=rot))
})
}
d
}
## Load "far.from.others.borders"
far.from.others.borders <- function(all.groups,...,debug=FALSE){
group.data <- split(all.groups, all.groups$group)
group.list <- list()
for(groups in names(group.data)){
## Run linear interpolation to get a set of points on which we
## could place the label (this is useful for e.g. the lasso path
## where there are only a few points plotted).
approx.list <- with(group.data[[groups]], approx(x, y))
if(debug){
with(approx.list, grid.points(x, y, default.units="cm"))
}
group.list[[groups]] <- data.frame(approx.list, groups)
}
output <- data.frame()
for(group.i in seq_along(group.list)){
one.group <- group.list[[group.i]]
## From Mark Schmidt: "For the location of the boxes, I found the
## data point on the line that has the maximum distance (in the
## image coordinates) to the nearest data point on another line or
## to the image boundary."
dist.mat <- matrix(NA, length(one.group$x), 3)
colnames(dist.mat) <- c("x","y","other")
## dist.mat has 3 columns: the first two are the shortest distance
## to the nearest x and y border, and the third is the shortest
## distance to another data point.
for(xy in c("x", "y")){
xy.vec <- one.group[,xy]
xy.mat <- rbind(xy.vec, xy.vec)
lim.fun <- get(sprintf("%slimits", xy))
diff.mat <- xy.mat - lim.fun()
dist.mat[,xy] <- apply(abs(diff.mat), 2, min)
}
other.groups <- group.list[-group.i]
other.df <- do.call(rbind, other.groups)
for(row.i in 1:nrow(dist.mat)){
r <- one.group[row.i,]
other.dist <- with(other.df, (x-r$x)^2 + (y-r$y)^2)
dist.mat[row.i,"other"] <- sqrt(min(other.dist))
}
shortest.dist <- apply(dist.mat, 1, min)
picked <- calc.boxes(one.group[which.max(shortest.dist),])
## Mark's label rotation: "For the angle, I computed the slope
## between neighboring data points (which isn't ideal for noisy
## data, it should probably be based on a smoothed estimate)."
left <- max(picked$left, min(one.group$x))
right <- min(picked$right, max(one.group$x))
neighbors <- approx(one.group$x, one.group$y, c(left, right))
slope <- with(neighbors, (y[2]-y[1])/(x[2]-x[1]))
picked$rot <- 180*atan(slope)/pi
output <- rbind(output, picked)
}
output
}
## Draw the plot
angled.boxes <-
list("far.from.others.borders", "calc.boxes", "enlarge.box", "draw.rects.modified")
gg <- ggplot(fit2,
aes(x = hincome, y = Probability, colour = Participation)) +
facet_grid(~ children, labeller = function(x, y) sprintf("%s = %s", x, y)) +
geom_line(size = 2) + theme_bw()
direct.label(gg, list("angled.boxes"))
możliwe duplikat [ggplot2 - opisywanie zewnątrz działki] (http://stackoverflow.com/questions/ 12409960/ggplot2-adnotacja-poza polem) – rawr