r - 添加形状时分组哑铃图变得不稳定

Question

我有以下数据显示白人与黑人在各个领域的一致性百分比。我想创建一个分组的哑铃图，其中 National 值和 State 值彼此相邻，以便于比较。

Domain = c("A", "B", "C", "D", "E", "F", "G", 
"A", "B", "C", "D", "E", "F", "G", "A", "B", "C", "D", "E", "F", 
"G", "A", "B", "C", "D", "E", "F", "G") 

Area = c("State", "State", 
"State", "State", "State", "State", "State", "National", "National", 
"National", "National", "National", "National", "National", "State", 
"State", "State", "State", "State", "State", "State", "National", 
"National", "National", "National", "National", "National", "National"

race = c("White", "White", "White", "White", "White", "White", 
"White", "White", "White", "White", "White", "White", "White", 
"White", "Black", "Black", "Black", "Black", "Black", "Black", 
"Black", "Black", "Black", "Black", "Black", "Black", "Black", 
"Black") 

pct_agreement = c(0.557610213756561, 0.735042750835419, 
0.567375898361206, 0.633762538433075, 0.64091557264328, 0.750356614589691, 
0.564539015293121, 0.651861846446991, 0.697574973106384, 0.653521358966827, 
0.713940441608429, 0.680985689163208, 0.751584351062775, 0.642535984516144, 
0.488484561443329, 0.581625580787659, 0.456939995288849, 0.580652594566345, 
0.630399644374847, 0.711643815040588, 0.347775995731354, 0.627996683120728, 
0.668737232685089, 0.610245823860168, 0.690373718738556, 0.705771028995514, 
0.738830924034119, 0.550933301448822)

当我的代码如下时，我得到一个图表，其中所有的点都很好地排列:

df <- data.frame(Domain, Area, race, pct_agreement)

ggplot(df) +
  geom_point(aes(x=Domain, y=pct_agreement, color=Area), 
             position=position_dodge(width=1)) +
  coord_flip()

但是当我试图根据受访者是黑人还是白人来制作不同的形状时，一切都突然变得不稳定。这是一个错误吗？有什么办法可以解决它或解决它吗？

我也不确定如何在“哑铃”的末端之间添加一条线——我尝试使用 geom_line(aes(group=Area)) 但这导致所有哑铃都被连接起来。

ggplot(df) +
  geom_point(aes(x=Domain, y=pct_agreement, color=Area, shape=race), 
             position=position_dodge(width=1)) +
  coord_flip()

注意:我浏览了本网站上的许多帖子以试图找到答案，许多帖子都建议使用 facet。这对我不起作用，因为我的老板希望将所有内容都放在一张图表上。

Answer 1

躲避是基于组进行的，并且通过两个分类变量( race 和 Area )，您最终会为每个域创建四个一组，因此这些点会被躲避到四个不同的位置。您可以通过显式设置组美学来避免这种情况。

先上数据:

Domain = c("A", "B", "C", "D", "E", "F", "G", 
           "A", "B", "C", "D", "E", "F", "G", "A", "B", "C", "D", "E", "F", 
           "G", "A", "B", "C", "D", "E", "F", "G") 

Area = c("State", "State", 
         "State", "State", "State", "State", "State", "National", "National", 
         "National", "National", "National", "National", "National", "State", 
         "State", "State", "State", "State", "State", "State", "National", 
         "National", "National", "National", "National", "National", "National")

race = c("White", "White", "White", "White", "White", "White", 
         "White", "White", "White", "White", "White", "White", "White", 
         "White", "Black", "Black", "Black", "Black", "Black", "Black", 
         "Black", "Black", "Black", "Black", "Black", "Black", "Black", 
         "Black") 

pct_agreement = c(0.557610213756561, 0.735042750835419, 
                  0.567375898361206, 0.633762538433075, 0.64091557264328, 0.750356614589691, 
                  0.564539015293121, 0.651861846446991, 0.697574973106384, 0.653521358966827, 
                  0.713940441608429, 0.680985689163208, 0.751584351062775, 0.642535984516144, 
                  0.488484561443329, 0.581625580787659, 0.456939995288849, 0.580652594566345, 
                  0.630399644374847, 0.711643815040588, 0.347775995731354, 0.627996683120728, 
                  0.668737232685089, 0.610245823860168, 0.690373718738556, 0.705771028995514, 
                  0.738830924034119, 0.550933301448822)

df <- data.frame(Domain, Area, race, pct_agreement)

现在剧情:

library(tidyverse)

ggplot(df) +
  geom_point(
    aes(
      x=Domain, y=pct_agreement, color=Area, shape=race,
      group = Area
    ), 
    position=position_dodge(width=1)
  ) +
  coord_flip()

由 reprex package (v0.3.0) 于 2019-11-08 创建

用线连接点很困难。我认为它值得一个单独的问题。我发布了一个 here.