将名称添加到R中的箱线图 [英] Add name to boxplot in R

问题描述

此问题与以下内容有关： R：如何标记箱形图的x轴

This question is related to: R: how to label the x-axis of a boxplot

绘制多列时，将显示名称。但是当只绘制一列时，即使使用names = ..参数，名称也不会出现：

When more than one column is plotted, names appear. But when only one column is plotted, name does not appear, even when names=.. argument is used:

ddf = structure(list(apple = c(1, 2, 3, 4, 5), banana = c(5, 4, 3, 
 2, 1), watermelon = c(4, 5, 6, 7, 8)), .Names = c("apple", "banana", 
 "watermelon"), row.names = c(NA, -5L), class = "data.frame")

 ddf
  apple banana watermelon
1     1      5          4
2     2      4          5
3     3      3          6
4     4      2          7
5     5      1          8


boxplot(ddf[,1:2])
boxplot(ddf[,1])

以下操作也不起作用：

boxplot(ddf[,1], names='apple')
boxplot(ddf[,1], names=c('apple'))

如何当仅使用一列时，我在箱图中添加名称吗？谢谢您的帮助。

How can I add name to the boxplot when only one column is used? Thanks for your help.

推荐答案

也许您可以使用'xlab'：

Maybe you can use 'xlab':

boxplot(ddf[,1], xlab="apple")

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