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我想将显示 sect 值的 geom_point 添加到我的分组 geom_bar 中，显示基于条件数据的点颜色的 perc 值

我的数据是这样的：

```structure(list(year = c(2019, 2019, 2019, 2018, 2018, 2018, 2017, 
2017, 2017, 2020, 2020, 2020), ques = c("q1", "q2", "q3", "q1", 
"q2", "q3", "q1", "q2", "q3", "q1", "q2", "q3"), sect = c(94.25, 
99, 86.33, 94.19, 92.21, 90.42, 98.88, 89.31, 82.76, 82.06, 75.46, 
59.39), perc = c(88.79, 94.71, 89.46, 89.69, 81.29, 84.1, 90.18, 
89.1, 73.38, 70.66, 97, 75.99), diff = c(-5.46, -4.29, 3.13, 
-4.5, -10.92, -6.32, -8.7, -0.21, -9.38, -11.4, 21.54, 16.6), 
    ci = c(12.76572759, 12.76572759, 12.76572759, 12.76572759, 
    12.76572759, 12.76572759, 12.76572759, 12.76572759, 12.76572759, 
    12.76572759, 12.76572759, 12.76572759)), class = c("spec_tbl_df", 
"tbl_df", "tbl", "data.frame"), row.names = c(NA, -12L), spec = structure(list(
    cols = list(year = structure(list(), class = c("collector_double", 
    "collector")), ques = structure(list(), class = c("collector_character", 
    "collector")), sect = structure(list(), class = c("collector_double", 
    "collector")), perc = structure(list(), class = c("collector_double", 
    "collector")), diff = structure(list(), class = c("collector_double", 
    "collector")), ci = structure(list(), class = c("collector_double", 
    "collector"))), default = structure(list(), class = c("collector_guess", 
    "collector")), skip = 1), class = "col_spec"))

表格是这样的：

```    year ques   sect  perc   diff    ci
   <dbl> <chr> <dbl> <dbl>  <dbl> <dbl>
 1  2019 q1     94.2  88.8  -5.46  12.8
 2  2019 q2     99    94.7  -4.29  12.8
 3  2019 q3     86.3  89.5   3.13  12.8
 4  2018 q1     94.2  89.7  -4.5   12.8
 5  2018 q2     92.2  81.3 -10.9   12.8
 6  2018 q3     90.4  84.1  -6.32  12.8
 7  2017 q1     98.9  90.2  -8.7   12.8
 8  2017 q2     89.3  89.1  -0.21  12.8
 9  2017 q3     82.8  73.4  -9.38  12.8
10  2020 q1     82.1  70.7 -11.4   12.8
11  2020 q2     75.5  97    21.5   12.8
12  2020 q3     59.4  76.0  16.6   12.8

简单的代码：

```df %>% 
  ggplot(aes(fill=ques, y = perc, x = year)) +
  geom_bar(position="dodge", stat="identity")+
  geom_point()

我想要的颜色条件是：

```df <- df %>%
  mutate(
    color = case_when(
      diff >= ci ~ "green",
      diff <= -ci ~ "red",
      TRUE ~ "grey"
    )
  )

作为第一步，我不能让点出现在相关条上：这会垂直显示点，但我希望它们在相关年份水平显示所以我会感谢帮助显示相关年份的点，并将颜色条件合并到diff >= ci 显示绿色，红色 <= - ci 显示绿色，两者都不显示灰色。希望这是有道理的，谢谢

4

1 回答 1

2

您可以position_dodge在geom_point调用中使用将点与条匹配。要获得正确的颜色，请将新列映射color到色标并添加对scale_color_identity.

如果我正确理解您的逻辑，则数据框中的所有点都不会变成红色，因为 的值diff都不小于 -12.8

df %>%   
  mutate(color = case_when(diff >= ci ~ "green",
                           diff <= -ci ~ "red",
                           TRUE ~ "gray20")) %>%
  ggplot(aes(fill=ques, y = perc, x = year)) +
  geom_bar(position="dodge", stat="identity")+
  geom_point(aes(color = color), 
             position = position_dodge(width = 0.9), size = 3) +
  scale_color_identity()

在此处输入图像描述

于 2020-11-14T18:25:11.537 回答