geom_segment

0th

Percentile

Single line segments.

Single line segments.

Usage
geom_segment(mapping = NULL, data = NULL,
    stat = "identity", position = "identity", arrow = NULL,
    lineend = "butt", na.rm = FALSE, ...)
Arguments
arrow
specification for arrow heads, as created by arrow()
lineend
Line end style (round, butt, square)
mapping
The aesthetic mapping, usually constructed with aes or aes_string. Only needs to be set at the layer level if you are overriding the plot defaults.
data
A layer specific dataset - only needed if you want to override the plot defaults.
stat
The statistical transformation to use on the data for this layer.
position
The position adjustment to use for overlappling points on this layer
na.rm
If FALSE (the default), removes missing values with a warning. If TRUE silently removes missing values.
...
other arguments passed on to layer. This can include aesthetics whose values you want to set, not map. See layer for more details.
Aesthetics

[results=rd,stage=build]{ggplot2:::rd_aesthetics("geom", "segment")} library(grid) # needed for arrow function p <- ggplot(seals, aes(x = long, y = lat)) (p <- p + geom_segment(aes(xend = long + delta_long, yend = lat + delta_lat), arrow = arrow(length = unit(0.1,"cm"))))

if (require("maps")) {

xlim <- range(seals$long) ylim <- range(seals$lat) usamap <- data.frame(map("world", xlim = xlim, ylim = ylim, plot = FALSE)[c("x","y")]) usamap <- rbind(usamap, NA, data.frame(map('state', xlim = xlim, ylim = ylim, plot = FALSE)[c("x","y")])) names(usamap) <- c("long", "lat")

p + geom_path(data = usamap) + scale_x_continuous(limits = xlim) }

# You can also use geom_segment to recreate plot(type = "h") : counts <- as.data.frame(table(x = rpois(100,5))) counts$x <- as.numeric(as.character(counts$x)) with(counts, plot(x, Freq, type = "h", lwd = 10))

qplot(x, Freq, data = counts, geom = "segment", yend = 0, xend = x, size = I(10))

# Adding line segments library(grid) # needed for arrow function b <- ggplot(mtcars, aes(wt, mpg)) + geom_point() b + geom_segment(aes(x = 2, y = 15, xend = 2, yend = 25)) b + geom_segment(aes(x = 2, y = 15, xend = 3, yend = 15)) b + geom_segment(aes(x = 5, y = 30, xend = 3.5, yend = 25), arrow = arrow(length = unit(0.5, "cm")))

geom_path and geom_line for multi- segment lines and paths.

Aliases
  • geom_segment
Documentation reproduced from package ggplot2, version 0.9.3.1, License: GPL-2

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