将晶须(水平线)添加到多个箱形图中

问题描述

我需要在我的多个箱形图中添加晶须(或水平线).

I need to add whisker (or horizontal lines) to my multiple box-plots.

您可以在这里找到我的数据集:到数据的链接已损坏...

You can find my dataset here: link to data is broken...

换句话说，我正在绘制三个变量(Mat，Ita和Log)除以性别(F和M)，以比较它们的箱形图.我需要在每个箱形图的两条垂直线的末尾添加一条水平线.

In other words, I am plotting three variables (Mat, Ita, and Log) divided by Gender (F and M), in order to compare their box plots. I need to add an horizontal line at the end of both vertical lines in each box plot.

我正在使用ggplot2程序包，到目前为止，我使用的代码是(此代码允许我根据需要创建箱形图，只需要添加水平线即可):

I am using ggplot2 package and the code I am using so far is (this code allows me to create the box plots as I need them, I only need to add the horizontal lines):

ggplot(newdata,aes(x=variable,y=value)) + 
  geom_boxplot(aes(fill=Gender)) + 
  xlab("Subject") + 
  ylab("Quiz score") + 
  ggtitle("Boxplots for quiz score and gender") + 
  scale_fill_manual(values=c("pink","lightblue"),labels=c("Female","Male")) + 
  theme(plot.title = element_text(face="bold"))

推荐答案

您可以使用stat_boxplot(geom ='errorbar')

我提供一个例子:

bp <- ggplot(iris, aes(factor(Species), Sepal.Width, fill = Species))
bp + geom_boxplot() + stat_boxplot(geom ='errorbar') 

结果:

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