ggplot2中不相关的图例信息 [英] Irrelevant legend information in ggplot2
问题描述
pre $ library $ g
myDat ; - data.frame(cbind(VarX = 10:1,VarY = runif(10)),
Descrip = sample(LETTERS [1:3],10,replace = TRUE)))
ggplot (myDat,aes(VarX,VarY,shape = Descrip,size = 3))+ geom_point()
...size = 3语句确实正确设置了点的大小。然而它导致这个传说诞生了一个名为3的小传说,并且只包含一个大圆点和数字3.除此之外,它的确也是如此
ggplot(myDat,aes(VarX,VarY,shape = Descrip))+ geom_point(aes(size = 3))
是的,这很有趣。如果它不那么有趣,它会在几个小时前让我疯狂。但现在让我们停下来。
这是因为它将它解释为审美映射而不是常量。这个作品我认为:
pre $ g $ p $ ggplot(myDat,aes(VarX,VarY,shape = Descrip))+ geom_point(size = 3 )
When running this code (go ahead, try it):
library(ggplot2)
(myDat <- data.frame(cbind(VarX=10:1, VarY=runif(10)),
Descrip=sample(LETTERS[1:3], 10, replace=TRUE)))
ggplot(myDat,aes(VarX,VarY,shape=Descrip,size=3)) + geom_point()
... the "size=3" statement does correctly set the point size. However it causes the legend to give birth to a little legend beneath it, entitled "3" and containing nothing but a big dot and the number 3.
This does the same
ggplot(myDat,aes(VarX,VarY,shape=Descrip)) + geom_point(aes(size=3))
Yes, it is funny. It would have driven me insane a couple hours ago if it weren't so funny. But now let's make it stop.
That's because it's interpreting it as an aesthetic mapping rather than a constant. This works I think:
ggplot(myDat,aes(VarX,VarY,shape=Descrip)) + geom_point(size=3)
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