基于值梯度填充boxplot颜色 [英] Fill boxplot color based on value gradient

问题描述

我想使用颜色渐变来根据 y 轴上的值对boxplot着色。我添加了红色到蓝色渐变的图例，但我不知道如何将这些颜色添加到每个框中。

  library （ggplot2）
 
 ggplot（mpg，aes（class，hwy））+ geom_boxplot（aes（color = hwy））+ 
 scale_fill_gradient2（low =red，high =blue ，
 midpoint = 25，limit = c（0,50），space =Lab，
 name =hwy）
  

解决方案

我不认为你可以。 ggplot 文档只提到一个因素的着色，而且我只看到有因素已在x轴上指定。

另外，当您考虑它时，您的陈述是模糊的，盒形图中的内容决定 fill ？中位数，上限，下限？

更新：

这并不是你所要求的，

  mpg％>％
 group_by（class）％>％
 mutate（ mean.hwy = mean（hwy））％>％
 ggplot（aes（class，hwy））+ 
 geom_boxplot（）+ 
 stat_summary（fun.y =mean，
 aes（y = mean.hwy，color = mean.hwy），
 geom =point）+ 
 scale_color_gradient2（low =red，
 high =blue ，
 midpoint = 25，
 limit = c（0,50），
 space =Lab，
 name =hwy）
  
 
 $ b 
出于某种原因，我无法使用中位数工作，我猜这里会更有意义，但希望这会让您更接近你的目标。 
I want to color the boxplot based the value on y axis using a color gradient. I added the legend filled with red to blue gradient but I don't know how to add those colors into each box.
library(ggplot2)

ggplot(mpg, aes(class, hwy))+ geom_boxplot(aes(colour = hwy))+
 scale_fill_gradient2(low = "red", high = "blue", 
   midpoint = 25, limit = c(0,50), space = "Lab", 
   name="hwy")

解决方案
I don't think you can. ggplot documentation only mentions coloring by a factor, and I see only factor that has been specified on x axis.

Also when you think about it your statement is ambigious, what in the box plot determines fill? Median, Upper Boundary, Lower Boundary?

Update:

This isn't exactly what you asked for but its close.
mpg %>% 
  group_by(class) %>% 
  mutate(mean.hwy= mean(hwy)) %>% 
  ggplot( aes(class, hwy)) +
    geom_boxplot() +
    stat_summary(fun.y= "mean",
                 aes(y=mean.hwy,color=mean.hwy),
                 geom = "point") +
    scale_color_gradient2(low = "red", 
                          high = "blue", 
                          midpoint = 25, 
                          limit = c(0,50), 
                          space = "Lab", 
                          name="hwy")
For some reason I couldn't get this to work with median which I guess would make more sense here but hopefully this will get you closer to your goal.

                        
这篇关于基于值梯度填充boxplot颜色的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！