在ggplot2中添加构面标题并更改图例标题 [英] Adding facet titles and changing legend title in ggplot2
问题描述
我想知道如何在ggplot2中添加构面标题
ggplot(diamonds,aes(cut))+ geom_bar()+ facet_grid(颜色〜清晰度)
并更改图例标题
ggplot(diamonds,aes(cut,fill = cut))+ geom_bar()+ facet_grid(。〜clarity)
感谢您的帮助。
使用所使用因子的等级进行标记。因此,如果您只是简单地改变关卡,比如
关卡(钻石$透明度)< - letters [1:8]
现在将使用这些字母标记这些方面。图例标题与该美学贴图的标签相匹配,您可以通过设置:
+ labs(fill =填充图例标签)
作为一个额外的珍闻,我注意到我可以设置 x
和 y
轴标签在 labs
中为NULL,但不包含图例标题;对于那些使用空字符的用户,如果您不想使用标题。
编辑
根据您的说明,您可以使用 grid.text
添加绘图区域以外的文本:
print(qplot(1,1),vp = viewport(width = 0.9))
grid.text(unit(0.95,npc),0.5,label =Right label,rot = 270)
I wonder how to add facet titles in ggplot2
ggplot(diamonds, aes(cut)) + geom_bar() + facet_grid(color ~ clarity)
and change the legend title
ggplot(diamonds, aes(cut, fill=cut)) + geom_bar() + facet_grid(. ~ clarity)
Thanks for your help.
The facets are labeled using the levels of the factor used. So if you simply change the levels , such as
levels(diamonds$clarity) <- letters[1:8]
those facets will now be labeled using those letters. The legend title matches the label for that aesthetic mapping, which you can set via:
+ labs(fill = "Fill legend label")
As an extra tidbit, I've noticed that I can set the x
and y
axis labels to NULL in labs
but not the legend titles; for those you use an empty character if you want no title.
Edit
Given your clarifications, you can add text outside the plotting area using grid.text
:
print(qplot(1,1),vp = viewport(width = 0.9))
grid.text(unit(0.95,"npc"),0.5,label = "Right label", rot = 270)
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