本文介绍了在主标题上方放置图例的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
在使用theme(legend.position = "top")
时,将图例放在ggplot2
主标题上方似乎是ggplot早期版本中的默认(也是不需要的)结果:
Placing the legend above the main title in ggplot2
when using theme(legend.position = "top")
seemed to be the default (and unwanted) outcome in previous versions of ggplot: ggplot legend at top but below title?
在当前版本的ggplot2
中,图例在设置theme(legend.position = "top")
时将其自身放置在图和主标题之间.一个小例子:
In the current version of ggplot2
, the legend places itself between the plot and the main title when setting theme(legend.position = "top")
. A small example:
d <- data.frame(x = 1:2, y = 1:2, z = c("a", "b"))
ggplot(d, aes(x = x, y = y, fill = z)) +
geom_col() +
ggtitle("My title") +
theme(legend.position = "top")
如何将图例放在主标题上方?
How can I place the legend above main title?
推荐答案
library(ggplot2)
ggplot(mtcars, aes(wt, mpg, color=cyl)) +
geom_point() +
labs(title = "Hey") +
theme(plot.margin = margin(t=4,1,1,1, "lines")) +
theme(legend.direction = "horizontal") +
theme(legend.position = c(0.5, 1.2))
还有其他方法,但这是我想到的最简单的方法.
There are other ways as well, but this was the easiest one that came to mind.
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