使用美学和 geom_text 时从图例中删除“a" [英] Remove 'a' from legend when using aesthetics and geom_text

问题描述

如何从此代码生成的图例中删除字母a"?如果我删除 geom_text，则a"字母将不会显示在图例中.不过，我想保留 geom_text.

How can I can remove the letter 'a' from the legend generated by this code? If I remove the geom_text, then the 'a' letter will not show in the legend. I want to keep geom_text, though.

ggplot(data = iris, aes(x = Sepal.Length, y=Sepal.Width, 
                        shape = Species, colour = Species)) + 
   geom_point() + 
   geom_text(aes(label = Species))

推荐答案

在geom_text中设置show.legend = FALSE:

ggplot(data = iris,
       aes(x = Sepal.Length, y = Sepal.Width, colour = Species,
           shape = Species, label = Species)) + 
    geom_point() +
    geom_text(show.legend = FALSE)

参数 show_guide 在 ggplot2 2.0.0 (查看发布新闻).

预ggplot2 2.0.0:

使用 show_guide = FALSE 就像这样......

With show_guide = FALSE like so...

ggplot(data = iris, aes(x = Sepal.Length, y = Sepal.Width , colour = Species,
                        shape = Species, label = Species ), size = 20) + 
geom_point() +
geom_text(show_guide  = FALSE)

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