gggibbous！好看的“月亮图”绘制，饼图平替，推荐...

DataCharm

发布于 2024-01-04 11:51:07

4640

文章被收录于专栏：数据学术商业新闻数据学术商业新闻

前言
- 一、gggibbous-用月亮圆缺表示数据，有趣~~
- 二、可视化学习圈子是干什么的？
- 三、系统学习可视化
- 四、猜你喜欢

gggibbous-用月亮圆缺表示数据，有趣~~

在整理我们的R语言可视化课程时，发现了一个非常有趣的图表类型-「月亮图(Moon charts)」 ，其用月亮的圆缺来表示占比数据的多少，是饼图替代图表类型。下面，我们就来介绍一下绘制月亮图的工具-「gggibbous」

gggibbous包介绍

「gggibbous」包就是绘制月亮图的基于ggplot2的R语言绘图工具，其提供的geom_moon() 函数就可以绘制月亮图。其安装脚本如下：

install.packages("gggibbous")
# or
devtools::install_github("mnbram/gggibbous")

月亮图和饼图的对比关系如下：

gggibbous包绘图案例

  library(gggibbous)
  ggplot(data.frame(x = 1:5, y = 1, size = 2^(0:4)), aes(x, y, size = size)) +
  geom_moon() +
  geom_point(y = 2) +
  lims(x = c(0.5, 5.5), y = c(0.5, 2.5)) +
  scale_size(range = c(5, 10))

基本样式

ggplot(data.frame(x = 1:5, y = 0, ratio = 0:4 * 0.25), aes(x = x, y = y)) +
  geom_moon(aes(ratio = ratio), size = 20, fill = "black") +
  geom_text(aes(y = y + 1, label = ratio)) +
  lims(x = c(0.5, 5.5), y = c(-1, 1.4)) +
  theme_void()

ratio aesthetic

tidymoons <- data.frame(
  x = rep(1:3, 6),
  y = rep(rep(3:1, each = 3), 2),
  ratio = c(1:9 / 10, 9:1 / 10),
  right = rep(c(TRUE, FALSE), each = 9)
)

ggplot(tidymoons) +
  geom_moon(aes(x, y, ratio = ratio, right = right, fill = right)) +
  lims(x = c(0.5, 3.5), y = c(0.5, 3.5))

right aesthetic

Legend key glyphs

dmeladh_adj <- dmeladh
dmeladh_adj$long <- dmeladh$Longitude + c(
  -2, 0, -2, 2, -3, 3, 3, 2, 3, 4, -2.5, -2.5, -1, -2, -2.5, -4, 2.5,
  5, 6, 7, 2, -7, -5.5, -3, 0, -7, -2, 3, 5.5, 0.5, -1, -1.5, -3, 2)
dmeladh_adj$lat <- dmeladh$Latitude + c(
  -2, 2, 0, 1, 0, 0, 0, 2, 0.5, -1, 1, -1.5, 2, 4, 1.5, 0, 2,
  1, -1, -3, -2, 1, -1, -2, -3, -2, -4, -3, -1, 1.5, 2, 2, -2, 0)

moonmap <- ggplot(dmeladh_adj, aes(long, lat)) +
  geom_polygon(
    data = map_data(
      "world", region = "(Australia)|(Indonesia)|(Papua New Guinea)"),
    aes(group = group),
    fill = "gray80"
  ) +
  geom_segment(aes(xend = Longitude, yend = Latitude), color = "gray20") +
  geom_point(aes(Longitude, Latitude), size = 0.75, color = "gray20") +
  scale_size(range = c(4, 10)) +
  coord_map(xlim = c(110, 160), ylim = c(-45, -5)) +
  theme_void() +
  theme(
    legend.position = c(0.05, 0.05),
    legend.direction = "horizontal",
    legend.justification = c(0, 0)
  )

moonmap +
  geom_moon(
    aes(ratio = AdhS / 100, size = N),
    right = FALSE, fill = "gold", color = "gold",
    key_glyph = draw_key_moon_left
  ) +
  geom_moon(
    aes(ratio = AdhF / 100, size = N),
    fill = "forestgreen", color = "forestgreen"
  )