ggplot：如何指定多个盒形图的垂直顺序？ [英] ggplot: how to specify vertical order of multiple boxplots?

问题描述

我想在下图中更改医院的堆叠顺序，所以＃1位于顶部，＃4位于底部。

  ggplot（survey，aes（x = hospital，y = age））+ geom_boxplot（）+ coord_flip（）+ xlab （）+ ylab（\ nPatient Age）
  

我需要top->顺序是与现在相反。我不确定为什么它现在是这样。 医院专栏是一个重要因素。

非常感谢！

解决方案

您有几个选项。最简单的方法是添加

  p + scale_x_reverse（）
  

到图中。您也可以逆转因素的水平

  relevel（survey $ hospital，rev（levels（survey $ hospital））） >调查$ hospital 
  

或者，您可以使用 xlim（）

  p + xlim（Hospital＃4，Hospital＃3 ，医院＃2，医院＃1）
  

I would like to change the stacking order of hospitals in the diagram below so #1 is at the top and #4 at the bottom.

The diagram was produced with

ggplot(survey,aes(x=hospital, y=age))+geom_boxplot()+coord_flip()+xlab("")+ylab ("\nPatient Age")

and I need the top->down order to be the reverse of what is now. I'm not sure why it comes the way it does now. The 'hospital' column is a factor in case it matters.

Many thanks!

解决方案

You have a few options. The easiest would be to add

p + scale_x_reverse()

to the plot. You could also reverse the levels of the factor

relevel(survey$hospital, rev(levels(survey$hospital))) -> survey$hospital

Or, you could determine the order you want the boxes by hand with xlim()

p + xlim("Hospital #4","Hospital #3","Hospital #2","Hospital #1")

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