如何更改构面标签? [英] How to change facet labels?

问题描述

我使用了以下 ggplot 命令:

I have used the following ggplot command:

ggplot(survey, aes(x = age)) + stat_bin(aes(n = nrow(h3), y = ..count.. / n), binwidth = 10)
  + scale_y_continuous(formatter = "percent", breaks = c(0, 0.1, 0.2))
  + facet_grid(hospital ~ .)
  + theme(panel.background = theme_blank())

生产

我想将 facet 标签更改为更短的标签(例如 Hosp 1、Hosp 2...)因为它们现在太长并且看起来很局促(增加图形的高度不是一种选择，它会在文档中占用太多空间).我查看了 facet_grid 帮助页面，但不知道如何操作.

I'd like to change the facet labels, however, to something shorter (like Hosp 1, Hosp 2...) because they are too long now and look cramped (increasing the height of the graph is not an option, it would take too much space in the document). I looked at the facet_grid help page but cannot figure out how.

推荐答案

使用以下内容更改基础因子级别名称:

Change the underlying factor level names with something like:

# Using the Iris data
> i <- iris
> levels(i$Species)
[1] "setosa"     "versicolor" "virginica" 
> levels(i$Species) <- c("S", "Ve", "Vi")
> ggplot(i, aes(Petal.Length)) + stat_bin() + facet_grid(Species ~ .)

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