ggplot2：如何调整boxplot中的填充颜色（和更改图例文本）？ [英] ggplot2: How to adjust fill colour in a boxplot (and change legend text)?

问题描述

我如何能：

How can I:

1. 在下面的boxplot中设置填充颜色？
   

2. 将图例文本从0，1更改为其他内容？

1. Set the fill colors in the boxplot below? I tried the argument "colour" but that failed.

2. Change the legend text from "0", "1" to something else?

require(ggplot2)
ggplot(mtcars, aes(factor(cyl), mpg)) +
    geom_boxplot(aes(fill=factor(vs), colour=c("grey50", "white")))

推荐答案

不是色彩美学，而是要调整填充美学。您可以通过调整比例来处理您的两个问题（以及更多）：

Instead of the colour aesthetic, you want to adjust the fill aesthetic. You can handle both of your questions (and much more) by adjusting the scale:

ggplot(mtcars, aes(factor(cyl), mpg, fill = factor(vs))) + 
  geom_boxplot() +
  scale_fill_manual(name = "This is my title", values = c("pink", "green")
                    , labels = c("0" = "Foo", "1" = "Bar"))

scale_manual 的ggplot2网站帮助页面充满了很好的例子。

The ggplot2 website help page for scale_manual is full of good examples.

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