将axis.text标签匹配到ggplot中数据框变量中包含的颜色

问题描述 投票:1回答:1

我想创建一个堆叠的条形图,其中我的axis.text从数据框中的变量中获取颜色值,该变量也提供了条形图的fill颜色。这非常重要,因为最终视觉效果的消费者将查看一系列这些条形图,因此即使Amount值(因此顺序)会有所不同,我也需要确保每种产品类型的颜色都一致。下面是我能得到的最接近的。

# My data sample
df <- data.frame(x=1:4, Type = c("Metals", "Foodstuff", "Textiles", "Machinery"), myColour = c('blue', 'red', 'green', 'orange'), Amount = c(75, 50, 25, 5))

# Create factor to order by amount value
df$Type <- factor(df$Type, levels = df[order(df$Amount), "Type"])

# MAKE BAR
gg1 <- ggplot(df, aes(Type, Amount, fill = Type, color = myColour)) +
  geom_bar(stat = 'identity', position = 'dodge', show.legend = FALSE, width = .85, colour = 'lightgrey', fill = df$myColour) + 
  #ggtitle("Exports Profile (%)") +
  labs(x = NULL, y = NULL) +
  scale_y_continuous(breaks = waiver(), limits = c(0,100)) +
  theme(#plot.title = element_text(family= 'sans', color = 'black', size = 28), 
    #axis.title = element_text(family= 'sans', color = 'black', size = 24), 
    axis.text.y = element_text(colour = df$myColour, size = 18, face = 'bold'),
    axis.ticks.y = element_blank(),
    axis.text.x = element_text(colour = 'black', size = 16),
    axis.ticks.x = element_line(colour = 'grey60'),
    axis.ticks.length = unit(3, "mm"),
    axis.line = element_line(NULL),
    plot.background = element_rect(fill = NULL),
    panel.background = element_rect(fill = 'white', colour = 'white'),
    panel.grid.major.x = element_line(colour = 'grey60', linetype = 'dashed'),
    panel.grid.major.y = element_line(colour = 'grey60', linetype = 'dashed'),
    #panel.margin = unit(c(0,0,0,0), "mm"),
    aspect.ratio = (600/450)) + 
  coord_flip()
gg1

哪个会产生:enter image description here

r ggplot2 colors geom-bar
1个回答
1
投票

您的因子水平未与因子顺序的更改相对应。

[请注意,我对您的df进行了更改,以便在重新排序时确实可以更改,更改位于Amount列中。

df <- data.frame(x=1:4, Type = c("Metals", "Foodstuff", "Textiles", "Machinery"), 
        myColour = c('blue', 'red', 'green', 'orange'), Amount = c(50, 75, 25, 5))

帮自己一个忙,加载tidyverse

library(tidyverse)

然后使用theme_set

theme_set(theme_classic()+
          theme(panel.grid.major.x = element_line(colour = 'grey60', linetype = 'dashed'),
                panel.grid.major.y = element_line(colour = 'grey60', linetype = 'dashed'),
                axis.ticks.y = element_blank(),
                axis.text.x = element_text(colour = 'black', size = 16),
                axis.ticks.x = element_line(colour = 'grey60'),
                axis.ticks.length = unit(3, "mm"),
                aspect.ratio = (600/450),
                axis.title.x=element_blank(),
                axis.title.y=element_blank()))

然后您可以“破解”并重新调整因素(也许不是最好的方法,但是可以完成)。

df %>% arrange(Amount) %>% mutate(myColour = factor(myColour, myColour), Type = factor(Type, Type)) -> df1

然后可以更轻松地将颜色级别作为绘制矢量。

mycols <- as.vector(levels(df1$myColour))

然后情节

ggplot(df1, aes(Type, Amount, color = myColour, fill = myColour)) + 
           geom_bar(stat = 'identity', position = 'dodge', show.legend = FALSE, width = .85)+ 
           theme(axis.text.y = element_text(colour = mycols, size = 18, face = 'bold'))+ 
           coord_flip()+
           scale_fill_manual(values = mycols)+
           scale_color_manual(values = mycols)

希望对您有用。

这是无效的原始编辑,因此可以忽略:在代码的两个实例中将df$myColour更改为myColour

通过这么多的主题调整,您还应该真正考虑使用theme_set

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