R ggplot2 boxplot - 通过函数/矢量值改变盒子宽度 [英] R ggplot2 boxplot - varying box width by a function/vector values

问题描述

我有一个包含多个组值的数据框，并且我希望每个类别都有一个boxplot（绘制在一起）。
我希望每个boxplot具有不同的宽度，不是基于每个类别的行数，而是基于列总和。

例如，使用以下data.frame：

 数据<  -  data.frame（roadType = sample（c（Ramp，Primary Street ，Highway），100，replace = TRUE），
 drivesCount = sample（1：100,100，replace = TRUE），
 happyPercentage = sample（c（0,0.25,0.5,0.75,1 ），100，replace = TRUE））
  

我知道有一种方法可以根据行count，像这样：

$ $ $ $ $ $ $ $ $ $ $ $ $ $ （x =Road Type，y =Happy People Percent）+ $ b $（varwidth = TRUE，alpha = 0.2）+
主题（legend.position =none）+
labs b theme（plot.title = element_text（hjust = 0.5））

但是我想要一个情节与 happyPercentage 的每个 roadType 的箱线图，其宽度基于 drivesCount 在特定道路类型中所占的比例超出了drivesCount总数。

这可能吗？我可以怎么做？

解决方案

可以通过权重美学。
您需要安装 quantreg 软件包才能使用它。我想你可以在那里提供你的函数，我用于演示 drivesCount 列的指数。所以你需要适应这一点。

  install.packages（quantreg）
 ggplot（Data，aes （x = roadType，y = happyPercentage））+ 
 geom_boxplot（varwidth = TRUE，alpha = 0.2，aes（weight = drivesCount ^ 10））+ 
 theme（legend.position =none）+ 
 labs（x =Road Type，y =Happy People Percent）+ 
 theme（plot.title = element_text（hjust = 0.5））
  

I have a data frame with several groups values, and I would like to have a boxplot per category (drawn together). I want to have each boxplot with a different width, based not on the rows count per category, but on a column sum.

For example, with the following data.frame:

Data <- data.frame(roadType = sample(c("Ramp", "Primary Street", "Highway"),100,replace=TRUE),
         drivesCount = sample(1:100,100,replace=TRUE),
        happyPercentage=sample(c(0,0.25,0.5,0.75,1),100,replace=TRUE))

I know there's a way to have varying width based on rows count, like this:

ggplot(Data, aes(x=roadType, y=happyPercentage)) +
  geom_boxplot(varwidth = TRUE, alpha=0.2) +
  theme(legend.position="none") +
  labs(x = "Road Type", y = "Happy People Percent") +
  theme(plot.title = element_text(hjust = 0.5))

But I want to have a plot with a boxplot for happyPercentage per roadType, with width based on the drivesCount proportion of the specific roadType out of the total drivesCount.

Is that possible? How can I do it?

解决方案

There is the possibility to weight each box plot via the weight aesthetics. You need to have the quantreg package installed to use this. I guess you can just provide your function in there, I used for demonstration an exponent of the drivesCount column. So you need to adapt this a little.

install.packages("quantreg")
ggplot(Data, aes(x=roadType, y=happyPercentage)) +
  geom_boxplot(varwidth = TRUE, alpha=0.2, aes(weight=drivesCount^10)) +
  theme(legend.position="none") +
  labs(x = "Road Type", y = "Happy People Percent") +
  theme(plot.title = element_text(hjust = 0.5))

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