使用ggplot2的R中的Boxplot [英] Boxplot in R using ggplot2

问题描述

我是R的新手，一直在试图制作一个boxplot。显示我正在使用的部分数据

  h1 h2 h3 h4 h5 h6 h7 h8 h8 h9 h10 
 1 0.003719430 0.002975544 0.003049933 0.003421876 0.003421876 0.003347487 0.003645042 0.003496264 0.007364472 0.009075410 
 2 0.003400540 0.002749373 0.003038781 0.003328188 0.003328188 0.003400540 0.003472892 0.003400540 0.007741656 0.009333398 
 3分配0.003741387 0.002918282 0.003142765 0.003367248 0.003367248 0.003367248 0.003666559 0.003516904 0.008081396 0.008156223 
 4分配0.003870634 0.002884002 0.003187581 0.003339370 0.003567055 0.003415265 0.003794739 0.003491160 0.008348426 0.007741268 
 5分配0.003782963 0.002950711 0.003177689 0.003480326 0.003404667 0.003404667 0.003707304 0.003631645 0.008927793 0.007414608 
 6分配0.003643736 0.002884624 0.003264180 0.003416002 0.003491913 0.003416002 0.003871469 0.003795558 0.009033428 0.007135649 
 7分配0.0037186​​00 0.003035592 0.00311148 2 0.003339151 0.003566821 0.003566821 0.003642710 0.003870380 0.008120209 0.008044319 
 8分配0.003819313 0.002979064 0.003284609 0.003360995 0.003590154 0.003437382 0.003895699 0.003590154 0.008326102 0.007791398 
 9分配0.003899334 0.002981844 0.003211216 0.003364131 0.003669961 0.003440589 0.003746419 0.003669961 0.008410328 0.007569295 
 10 0.003828488 0.002986220 0.003292499 0.003445639 0.003522209 0.003522209 0.003598778 0.003598778 0.008422673 0.007810115 
  

当我使用默认的 boxplot 命令，那么这就是我得到的

$ p $ boxplot（df）


我一直在尝试使用 ggplot2 生成相同数据的boxplot，但它给出了一个我无法解决的错误。

  library（ggplot2）
 df<  -  readRDS（'data.Rda'）
 ggplot（df）+ geom_boxplot（）
  

错误

 不知道如何自动为数据类型的对象选择比例。默认为连续
错误：美学必须是长度为1或与dataProblems相同的长度：df [，6:15] 
  

我看到 ggplot2文档 geom_boxplot 并且实现（从这个例子）我需要重新排列我的数据，比如

  col1 col2 
 h1 0.003719430 
 h1 0.003400540 
 h1 0.003741387 
 h1 0.003870634 
 h1 0.003782963 
 h1 0.003643736 
 h2 0.002975544 
 h2 0.002749373 
 h2 0.002918282 
 h2 0.002884002 
 h2 0.002950711 
 h2 0.002884624 
 ... 
  

并使用类似于

  ggplot（df，aes（factor（col1 ），col2））+ geom_boxplot（）
  

但这是很多工作。我相信必须有一些方法可以自动执行，而我无法找到它。任何帮助表示赞赏。

解决方案

你是对的 ggplot 被重新塑造，但它不是很难使用包 reshape2 ：

 <$ c 
 df < - 熔体（df）
 ggplot（df，aes（x =变量，y =值））+ geom_boxplot（）
  

I'm new to R and have been trying to make a boxplot. A part of the data I'm using is shown

            h1          h2          h3          h4          h5          h6          h7          h8          h9         h10
1  0.003719430 0.002975544 0.003049933 0.003421876 0.003421876 0.003347487 0.003645042 0.003496264 0.007364472 0.009075410
2  0.003400540 0.002749373 0.003038781 0.003328188 0.003328188 0.003400540 0.003472892 0.003400540 0.007741656 0.009333398
3  0.003741387 0.002918282 0.003142765 0.003367248 0.003367248 0.003367248 0.003666559 0.003516904 0.008081396 0.008156223
4  0.003870634 0.002884002 0.003187581 0.003339370 0.003567055 0.003415265 0.003794739 0.003491160 0.008348426 0.007741268
5  0.003782963 0.002950711 0.003177689 0.003480326 0.003404667 0.003404667 0.003707304 0.003631645 0.008927793 0.007414608
6  0.003643736 0.002884624 0.003264180 0.003416002 0.003491913 0.003416002 0.003871469 0.003795558 0.009033428 0.007135649
7  0.003718600 0.003035592 0.003111482 0.003339151 0.003566821 0.003566821 0.003642710 0.003870380 0.008120209 0.008044319
8  0.003819313 0.002979064 0.003284609 0.003360995 0.003590154 0.003437382 0.003895699 0.003590154 0.008326102 0.007791398
9  0.003899334 0.002981844 0.003211216 0.003364131 0.003669961 0.003440589 0.003746419 0.003669961 0.008410328 0.007569295
10 0.003828488 0.002986220 0.003292499 0.003445639 0.003522209 0.003522209 0.003598778 0.003598778 0.008422673 0.007810115

When I use the default boxplot command then this is what I get

boxplot(df)

I have been trying to generate the boxplot for same data using ggplot2 but it gives an error which I am unable to resolve. Here's what I tried.

library(ggplot2)
df <- readRDS('data.Rda')
ggplot(df) + geom_boxplot()

Here's the error

Don't know how to automatically pick scale for object of type data.frame. Defaulting to continuous
Error: Aesthetics must either be length one, or the same length as the dataProblems:df[, 6:15]

I saw the ggplot2 docs for geom_boxplot and realize (from the example) that I need to rearrange my data like

col1        col2
h1   0.003719430
h1   0.003400540
h1   0.003741387
h1   0.003870634
h1   0.003782963
h1   0.003643736
h2   0.002975544
h2   0.002749373
h2   0.002918282
h2   0.002884002
h2   0.002950711
h2   0.002884624
...

and use something like

ggplot(df, aes(factor(col1), col2)) + geom_boxplot()

But that is a lot of work. I believe that there must be some way to do this automatically which I'm not able to find. Any help is appreciated.

解决方案

You are right ggplot requires your data to be reshaped, but it isn't that hard using the package reshape2:

library(reshape2)
df <- melt(df)
ggplot(df, aes(x=variable, y=value)) + geom_boxplot()

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