R ggplot：如何将点与躲避条对齐？

Question

我想知道如何将 geom_point 点与 geom_bar 躲避条位置对齐。

根据 Year 参数对条形图进行躲避，但无论其 Year 参数如何，所有点都绘制在躲避条形图的中间。

可重现的代码：

set.seed(42)
dat <- data.frame(Response = rep(paste0("Response",1:4),2),
                  Proportion = round(runif(8),2),
                  Year = c(rep(2017,4),rep(2018,4)))
industries <- data.frame(Response = rep(paste0("Response",1:4),6),
                         Proportion = round(runif(24),2),
                         Year = rep(c(rep(2017,4),rep(2018,4)),3),
                         Cat = rep(paste0("Cat",1:3),c(rep(8,3))))
ggplot(dat, aes(Response, Proportion, label = paste0(Proportion*100,"%"), fill = factor(Year))) + 
  geom_bar(stat = "identity", position = "dodge" ) + 
  geom_point(data = industries, aes(Response, Proportion, fill = factor(Year), col= Cat), size = 3) +
  theme(axis.text.x = element_text(angle = 90)) + 
  scale_y_continuous(labels = scales::percent) + 
  geom_text(position = position_dodge(width = 1), angle = 90)

Answer 1

你需要group = factor(Year)in aes()，然后position = position_dodge(1)（如@Tung 所建议的那样）。也重复x, y在aes()为geom_point()是多余的：

ggplot(dat, aes(Response, Proportion, label = paste0(Proportion*100,"%"), 
                fill = factor(Year))) + 
  geom_bar(stat = "identity", position = "dodge" ) + 
  geom_point(data = industries, aes(col= Cat, group = factor(Year)), size = 3,
             position = position_dodge(1)) +
  theme(axis.text.x = element_text(angle = 90)) + 
  scale_y_continuous(labels = scales::percent) + 
  geom_text(position = position_dodge(width = 1), angle = 90)