使用 ggplot2 在分面躲避条形图的顶部添加文本 [英] Add text on top of a facet dodged barplot using ggplot2

问题描述

我想绘制两个不同年份的躲避条形图，并相应地将收入数字放在条形图的顶部.在尝试了一些我在这里找到的建议后，我仍然不能完全得到我想要的(所有数字都显示在中间条/列的中间，而不是平均分布).任何建议将不胜感激.谢谢！

I'd like to plot a dodged barplot for two different years and put the revenue numbers on top of the bar accordingly. After trying quite some suggestion I found over here, I still can't quite get what I want (all the numbers were displayed in the middle of the middle bars/columns instead of spreading equally). Any suggestion would be appreciated. Thanks!

我最近的尝试

# Disable scientific notation
options("scipen" = 100, "digits" = 1)

censusData <- structure(list(Year = c(2012L, 2007L, 2012L, 2007L, 2012L, 2007L, 
                                      2012L, 2007L, 2012L, 2007L, 2012L, 2007L, 2012L, 2007L, 2012L, 
                                      2007L, 2012L, 2007L, 2012L, 2007L, 2012L, 2007L, 2012L, 2007L
                                      ), County = c("A", "A", "B", "B", "C", "C", "Sum", "Sum", "A", 
                                      "A", "B", "B", "C", "C", "Sum", "Sum", "A", "A", "B", "B", "C", 
                                      "C", "Sum", "Sum"), variable = structure(c(1L, 1L, 1L, 1L, 1L, 
                                      1L, 1L, 1L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 3L, 3L, 3L, 3L, 3L, 
                                      3L, 3L, 3L), .Label = c("Total_Revenue", "Crop_Revenue", "Livestock_Revenue"
                                      ), class = "factor"), value = c(1645.51, 1203.806, 68.911, 60.949, 
                                      923.163, 525.918, 2637.584, 1790.673, 1069.497, 787.459, 47.157, 
                                      38.735, 825.050228, 470.024, 1941.704228, 1296.218, 576.013, 
                                      416.347, 21.754, 22.214, 98.112772, 55.894, 695.879772, 494.455
                                      )), row.names = c(NA, -24L), .Names = c("Year", "County", "variable", 
                                      "value"), class = "data.frame")

# Dodged barplot
qbarplot_yr_1 <- ggplot(censusData, aes(County, value)) + facet_grid(. ~ Year) +  
  geom_bar(aes(fill = variable), position = "dodge", stat="identity") +
  xlab("County") + ylab("Revenue (Million USD)") +
  scale_fill_discrete(name = 'Legend', labels=c("Total", "Crop", "Livestocks")) +
  theme(axis.ticks.x = element_blank()) +
  theme(panel.background = element_rect(colour='dark grey')) +
  theme(strip.text.x = element_text(size = 20, face="bold"),
        strip.background = element_rect(colour="dark grey"))

# Add text on top of the bar
qbarplot_yr_1 + geom_text(data = censusData,
                          aes(x = County, y = value + 150, label = format(value, nsmall = 0, scientific = FALSE)), 
                          color="blue")

推荐答案

您还需要避开文本值.试试

You need to dodge the text values as well. Try

qbarplot_yr_1 + geom_text(data = censusData,
         aes(x = County, group=variable, y = value + 150, 
         label = format(value, nsmall = 0, digits=1, scientific = FALSE)), 
         color="blue", position=position_dodge(.9), hjust=.5)

我们还需要 group= 以便它知道要躲避哪些值.

We also need the group= so it knows which values to dodge on.

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