如何用 R 重现这个移动分布图?

How to reproduce this moving distribution plot with R?

G Elliot Moris 显示 political polarization through time using a moving distribution plot

从这个问题:How to use 'facet' to create multiple density plot in GGPLOT,我设法使用 facets 使用虚拟数据重现类似的情节:

library(ggplot2)
set.seed(101)
dtf <- data.frame(variable = c(rnorm(1000),
                               rnorm(1000) + rep(1:10/2,each =100)),
                  group = rep(c("a","b"), each = 1000),
                  year = rep(2001:2010, each=100))
ggplot(dtf) +
    geom_density(aes(x = variable, fill = group)) +
    facet_grid(year ~.)

但我希望分布像原始图中一样重叠。是否有此类图的特定名称,是否可以用 R 重现它们?

[编辑] this global temperature distribution plot 中提供了类似情节的动态版本。

更新:用于创建此图的包现在命名为 "ggridges"。

为此您需要 ggjoy 包。这是一个需要整理的粗略版本:


devtools::install_github("clauswilke/ggjoy")
library(ggjoy)
library(ggplot2)

#Create data frame
set.seed(101)
dtf <- data.frame(variable = c(rnorm(1000),
                               rnorm(1000) + rep(1:10/2,each =100)),
                  group = rep(c("a","b"), each = 1000),
                  year = rep(2001:2010, each=100))

# Use ggplot2 and ggjoy packages  
ggplot(dtf,aes(x = variable, y = as.factor(year), fill = group)) +
  geom_joy(scale = 2,alpha = .5,rel_min_height = 0.01) + theme_joy() 
#> Picking joint bandwidth of 0.347