图例中未显示“填充”比例 [英] `fill` scale is not shown in the legend
问题描述
这是我的虚拟代码:
set.seed(1)
df< - data.frame (xx =样本(10,6),
yy =样本(10,6),
type2 = c('a','b','a','a','b' ,'b'),
type3 = c('A','C','B','A','B','C')
)
ggplot(data = af(x = x,y = yy))+
geom_point(aes(shape = type3,fill = type2),size = 5)+
scale_shape_manual(values = c(24 ,25,21))+
scale_fill_manual(values = c('green','red'))
生成的图有一个图例,但它是'type2'部分不反映
我知道这是一个古老的线程,但我遇到了这个确切的问题,并希望在这里发布给像我这样的人。尽管接受的答案有效,但风险较小,清洁的方法是:
$ g $ p $ ggplot2
ggplot(data = df,mapping = aes(x = xx,y = yy))+
geom_point(aes(shape = type3,fill = type2),size = 5)+
scale_shape_manual(values = c(24, 25,21))+
scale_fill_manual(values = c(a ='green',b ='red'))+
guides(fill = guide_legend(override.aes = list(shape = 21) ))
关键在于将图例中的形状更改为可以具有填充'。
Here is my dummy code:
set.seed(1)
df <- data.frame(xx=sample(10,6),
yy=sample(10,6),
type2=c('a','b','a','a','b','b'),
type3=c('A','C','B','A','B','C')
)
ggplot(data=df, mapping = aes(x=xx, y=yy)) +
geom_point(aes(shape=type3, fill=type2), size=5) +
scale_shape_manual(values=c(24,25,21)) +
scale_fill_manual(values=c('green', 'red'))
Resulting plot has a legend but it's 'type2' section doesn't reflect scale of fill
value - is it by design?
I know this is an old thread, but I ran into this exact problem and want to post this here for others like me. While the accepted answer works, the less risky, cleaner method is:
library(ggplot2)
ggplot(data=df, mapping = aes(x=xx, y=yy)) +
geom_point(aes(shape=type3, fill=type2), size=5) +
scale_shape_manual(values=c(24,25,21)) +
scale_fill_manual(values=c(a='green',b='red'))+
guides(fill=guide_legend(override.aes=list(shape=21)))
The key is to change the shape in the legend to one of those that can have a 'fill'.
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