更改使用ggforce::geom_mark_ellipse()创建的标记椭圆的边框厚度

Question

我试图更改使用ggforce::geom_mark_ellipse()创建的标记椭圆的边框。我如何删除边框，只保留填充的椭圆？可重现性代码如下所示。

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library(palmerpenguins)
library(tidyverse)
library(ggplot2)
library(ggforce)

penguins <- penguins %>%
  drop_na()
penguins %>% head() %>% print()


p <- penguins %>%
  ggplot(aes(x = bill_length_mm,
             y = flipper_length_mm))+
  geom_mark_ellipse(aes(colour=species, fill = species),
                   expand = unit(0.5,"mm"),
                   show.legend = F)+
  geom_point(aes(color = species))

print(p)

Answer 1

您可以通过size删除大纲或设置厚度，即size=0或size=NA将工作以删除大纲。另一个选项是将行类型设置为空白，即lty = "blank"。

library(palmerpenguins)
library(tidyverse)
library(ggplot2)
library(ggforce)

penguins <- penguins %>%
  drop_na()

p <- penguins %>%
  ggplot(aes(x = bill_length_mm,
             y = flipper_length_mm))+
  geom_mark_ellipse(aes(colour=species, fill = species),
                    expand = unit(0.5,"mm"), size = 0,
                    show.legend = F)+
  geom_point(aes(color = species))

print(p)

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