使用美观和 geom_text 时从图例中删除 'a'

Question

如何从这段代码生成的图例中删除字母“a”？如果我删除geom_text，那么“a”字母将不会显示在图例中。不过，我想保留 geom_text。

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

Answer 1

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 中更名为 show.legend ( see release news )。

<小时/>

ggplot2 2.0.0 之前的版本:

像这样show_guide = FALSE...

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)