如何更改 ggplotly 中的工具提示以在条形图中显示列的总和

Question

我使用 ggplot 和 ggplotly() 渲染了这个条形图

它按照我想要的方式呈现，因为它按模式类型和年份显示了总崩溃的总和。

但是，我正在努力让（悬停）工具提示显示总崩溃的总和。现在，它只显示“1”。

我需要对我的代码执行哪些操作才能配置工具提示以显示图表中显示的总崩溃次数，而不是值 1？这是我的代码及其生成的条形图：

crashplot <- ggplot(totcrashes_by_year, aes(totcrashes_by_year$`Crash Year`, totcrashes_by_year$`Total Crashes`))
crashplot +geom_bar(stat = "identity", 
                        aes(fill=totcrashes_by_year$`Mode Type`), position = "stack") + xlab("Crash Year") + ylab("Total Crashes") + ggtitle("Total Crashes by Year and Mode Type") + labs(fill = "Mode Type")

编辑：可重现的代码示例 这是复制此问题的代码。

crashsample <- data.frame(year = sample(2007:2018, 40, replace = T),
             crashes = 1, 
             type = sample(c('Vehicle', 'Pedestrian','Bike','Motorcycle'), 5, replace = TRUE))

创建 ggplot

crashplot <- ggplot(crashsample, aes(x =  year, y = crashes, fill = type)) +
  geom_bar(stat = "identity") + 
  labs(x = 'Crash Year', 
       y = 'Total Crashes', 
       title = "Total Crashes by Year and Mode Type", 
       fill = "Mode Type")
#call to ggplotly to render as a dynamic plotly chart
ggplotly(crashplot)

Answer 1

此代码 returns 对我有效的标签

# Simulate Data
df <- data.frame(year = sample(2005:2015, 20, replace = T),
                 crashes = sample(30:100, 20), 
                 type = sample(c('Vehicle', 'Pedestrian'), 20, replace = TRUE))
# Required packages
require(plotly); require(tidyverse)
# ggplot2 plot definition
crashplot <- df %>%
  group_by(year, type) %>%
  summarise(summed_crashes = sum(crashes)) %>%
  ggplot(., aes(x = year, y = summed_crashes, fill = type)) +
  geom_bar(stat = 'identity') + 
  labs(x = 'Crash Year',
       y = 'Total Crashes',
       title = 'Total Crashes by Year and Mode Type',
       fill = "Mode Type")
# Show plot with plotly
ggplotly(crashplot)

如果它不起作用，最好查看此问题的可重现数据示例。

如何更改 ggplotly 中的工具提示以在条形图中显示列的总和

How to Change the Tooltip in ggplotly to show SUM of a Column in a Bar Chart

r

ggplot2

ggplotly

创建 ggplot