Hy4m / ggvwline

ggvwline

The purpose of ggvwline is to provide a set of layer functions for drawing variable-width curves.

Installation

You can install the development version of ggvwline from GitHub with:

# install.packages("devtools")
devtools::install_github("Hy4m/ggvwline")

Example

This is a basic example which shows you how to draw variable-width curves:

library(ggvwline)
library(ggplot2)
tt <- seq(0, 2 * pi, length.out = 102)[-c(1, 102)]
dd <- data.frame(x = cos(tt),
                 y = sin(tt),
                 w = runif(100, 10, 30),
                 g = rep(LETTERS[1:4], each = 25))

ggplot(dd, aes(x, y, fill = g)) +
  geom_vwline() +
  coord_fixed()

ggplot(dd, aes(x, y, fill = g)) +
  geom_offset_xspline(aes(width = w)) +
  coord_fixed()

dd2 <- data.frame(x = 1,
                 y = 1:10,
                 xend = 2:11,
                 yend = 3:12,
                 width = runif(10, 3, 20),
                 group = LETTERS[1:10])

ggplot(dd2, aes(x, y, xend = xend, yend = yend)) +
  geom_vwdiagonal(aes(width = stat(index), fill = group),
                  width_units = "cm",
                  lineend = "round",
                  alpha = 0.5)