使用 ggplotly 进行缩放后的不同工具提示

Question

我正在尝试使用 ggplot 和 ggplotly 制作组合条形图和点图。我正在对条形图使用比例偏移，以便原点从 100 开始。我成功了，但是条形图和点的工具提示值不同：条形图改变了值，而点保留了原始值。我希望两个工具提示都具有相同的 'correct'（非移位值）。这可能吗？

library(ggplot2)
library(dplyr)
library(ggthemes)
library(plotly)

set.seed(369)
values <- round(100 + rnorm(6) * 10, 2)
df <- data.frame(Year = rep(2014:2019, 2), 
                  value = rep(values, 2),
                  Indicator = "Indicator1",
                  Type = rep(c("Bar", "Point"), each = 6))

p <- ggplot(df, aes(value))

bars <- df  %>%
  filter(Type == "Bar")

points <- df  %>%
  filter(Type == "Point")

t_shift <- scales::trans_new("shift",
                             transform = function(x) {x - 100},
                             inverse = function(x) {x + 100})

pl <- p +
  geom_bar(data = bars,
           aes(fill = Indicator, group = Indicator,x = Year, y = value), stat = "identity", position = "dodge") +
  geom_point(data = points,  aes(x = Year, y = value, group = Indicator)) +
  scale_fill_manual(values=c("#00A6CE", "#A83D72"))+
  theme_tufte() +
  theme(legend.title = element_blank()) +
  scale_y_continuous(limits = c(80, 120), trans = t_shift) 

ggplotly(pl, tooltip = c("value"))

Answer 1

我认为最简单的方法是为两个数据集复制 value 并将其包含在 ggplot 图表的另一个变量中。

这段代码在我的电脑上有效：

bars$Value <- bars$value
points$Value <- points$value


pl <- p +
  geom_bar(data = bars,
           aes(fill = Indicator, group = Indicator,x = Year, y = value,z=Value), stat = "identity", position = "dodge") +
  geom_point(data = points,  aes(x = Year, y = value, group = Indicator,z=Value)) +
  scale_fill_manual(values=c("#00A6CE", "#A83D72"))+
  theme_tufte() +
  theme(legend.title = element_blank()) +
  scale_y_continuous(limits = c(80, 120), trans = t_shift) 

ggplotly(pl, tooltip = c("Year","Value"))

使用 ggplotly 进行缩放后的不同工具提示

Different tooltips after scale shift with ggplotly

r

ggplot2

ggplotly