ggplot为geom_point形状自定义图例并删除背景

粉红

我有看起来像这样的数据:

df = data.frame(
  measure = c("Measure A","Measure B","Measure C","Measure D",
              "Measure E","Measure F","Measure G"),
  overall = c(56, 78, 19, 87, 45, 51, 19),
  company = c(45, 89, 18, 98, 33, 55, 4),
  company_p = c(32, 65, 5, 56, 12, 45, 10)
)

使用此代码:

ggplot(df %>% 
         mutate(fill = ifelse(overall > company, " Below Overall  "," Above Overall  ")), 
       aes(measure)) + 
  geom_col(aes(y=company, fill= fill)) + 
  geom_point(aes(y=overall, color="overall"), size=6, shape=124) + 
  geom_point(aes(y=company_p, color="company_p"), size=2, shape=19) +
  coord_flip() + 
  scale_color_manual(values=c("red4","grey3"),labels=c("Company Last Year","Overall")) + 
  scale_fill_manual(values=c(" Below Overall  "="lightpink2",
                             " Above Overall  "="lightblue2")) +
  theme(legend.key=element_blank())

我得到一个图,看起来像这样:

在此处输入图片说明

如何设置图例,以使图例上的company_p值或“ Company Last Year”看起来像相应的形状,而“ Total”看起来像黑线?

我尝试将形状类型链接到图例,如下所示:

ggplot(df %>% 
         mutate(fill = ifelse(overall > company, " Below Overall  "," Above Overall  ")), 
       aes(measure)) + 
  geom_col(aes(y=company, fill= fill)) + 
  geom_point(aes(y=overall, color="overall"), size=6, shape="overall") + 
  geom_point(aes(y=company_p, color="company_p"), size=2, shape="company_p") +
  coord_flip() + 
  scale_shape_manual(values=c(overall=124, company_p=19)) +
  scale_color_manual(values=c("red4","grey3"),labels=c("Company Last Year","Overall")) + 
  scale_fill_manual(values=c(" Below Overall  "="lightpink2",
                             " Above Overall  "="lightblue2")) +
  theme(legend.key=element_blank())

在此处输入图片说明

但是形状符号与参考没有关联(124是|,19是一个圆形),并且看起来这些形状在图例中在一起,而不是分开。

航天飞机

这是一种方法。我重塑了数据tidyr以合并有争议的两列。由于您希望这些点具有不同的颜色,大小和形状,因此需要在aes()for中包括所有这些点geom_point,然后可以使用scale_具有相同name参数的函数。我命名了,Legend但是您可以将其更改为任何有意义的名称。

library(tidyr)
df2 <- df %>% mutate(fill = ifelse(overall > company, " Below Overall  "," Above Overall  ")) %>%
  gather(key, val, -company, -measure, -fill)

ggplot(df2, aes(measure)) + 
  geom_col(aes(y=company, fill= fill), data = df2[!duplicated(df2$measure),]) +
  scale_fill_manual(values=c(" Below Overall  "="lightpink2"," Above Overall  "="lightblue2")) +
  geom_point(aes(y=val, shape=key, color = key, size = key), data = df2) +
  scale_color_manual(name = "Legend", values=c("red4", "grey3"), labels = c("Company Last Year", "Overall")) +
  scale_shape_manual(name = "Legend", values = c(19, 124), labels = c("Company Last Year", "Overall")) +
  scale_size_manual(name = "Legend", values = c(2, 6), labels = c("Company Last Year", "Overall")) +
  coord_flip()

在此处输入图片说明

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