ggplot：根据条内的名称更改堆积条的顺序 [英] ggplot: change the order of stacked bars based on the a name within the bar

问题描述

  ggplot（data，aes（x = ab，y = Freq / total，fill = Result））+ 
 geom_bar（stat =identity）+ 
主题（strip.text.x = element_text（size = 8，angle = 0），
 strip.background = element_rect（color =black，fill =＃CCCCFF））+ 
 ggtitle （H.somnus SIR％）+ ylab（％SIR）+ 
 scale_y_continuous（labels = percent，breaks = seq（0,1，.1））+ 
 theme_set（theme_barplot（） ）
  

以上是我正在使用的代码。数据是一个我已经融化的表格，但结果列的顺序是按字母顺序排列的，str（结果）是一个有4个级别的因子：像A，B，C，D。我想显示底部最大的条形图，并且订单将是D，B，C，A

谢谢

解决方案

这是一个被黑客入侵的修复程序，但它有效。当使用stat =identity时，ggplot将按照遇到它们的顺序绘制堆积条形图。要按照D，B，C，A的顺序获得堆栈，请按如下方式对数据框架重新排序：

  data < data [c（data $ Result ==D，
 data $ Result ==B，
 data $ Result ==C，
 data $ Result ==A ），] 
  

ggplot2 帮助文件在这方面可能会更好。

ggplot(data,aes(x=ab,y=Freq/total,fill=Result))+
      geom_bar(stat="identity")+
     theme(strip.text.x = element_text(size=8, angle=0),
      strip.background = element_rect(colour="black", fill="#CCCCFF"))+
    ggtitle("H.somnus SIR %")+ylab("% SIR")+
    scale_y_continuous(labels=percent,breaks=seq(0,1,.1))+
    theme_set(theme_barplot())

Above is the code that I am using. data is a table that I have melted, but the column 'result' is in an order that is alphabetical and the str(result) is a factor with 4 levels: like A,B,C,D. What I would like to display the bars with the largest bar on the bottom and the order would be D,B,C,A

Thanks

解决方案

It's a bit of a hacked fix but it works. ggplot will plot the stacked bars in the order it encounters them when using stat = "identity". To get the stack in the order D,B,C,A reorder your data.frame like this:

data <- data[c(data$Result == "D",
               data$Result == "B",
               data$Result == "C",
               data$Result == "A"),]

the entry in the ggplot2 help files could be better in this respect.

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