r - 如何将 geom_point 添加到 stat_density_ridges

Question

我可以使用此代码绘制 density_ridge 。我想在不改变当前设计的情况下在百分位数 0.50 处添加 geom_point。任何帮助将非常感激。

library(ggplot2)
library(ggridges)

 ggplot(iris, aes(x=Sepal.Length, y=Species, fill = factor(stat(quantile)))) +
  stat_density_ridges(
    geom = "density_ridges_gradient", calc_ecdf = TRUE,
    quantiles = 4, quantile_lines = TRUE
  )

Answer 1

尝试

p + geom_point(data = aggregate(Sepal.Length ~ Species, iris, median),
               aes(x = Sepal.Length, y = Species),
               color = "red",
               size = 5,
               inherit.aes = FALSE)

（沿着你必须调用viridis调色板的方式似乎）

数据

library(ggplot2)
library(ggridges)

p <- ggplot(iris, aes(x=Sepal.Length, y=Species, fill = factor(stat(quantile)))) +
  stat_density_ridges(
    geom = "density_ridges_gradient", calc_ecdf = TRUE,
    quantiles = 4, quantile_lines = TRUE
  )