在Highcharter工具提示中格式化日期时间

Question

试图在工具提示中更改日期时间的格式。我成功地为x轴完成了操作，但没有为工具提示做过。我已经阅读了文档，却找不到与此有关的另一个R特定主题。

日期位于datetime_to_timestamp函数所需的Highchart时间戳中。

library(highcharter)
library(tidyverse)

df <- data.frame(dateTime = c(1557705900000,1557705960000,1557706020000,1557706860000,1557706920000),
                 points = c(5,7,3,2,9))

highchart() %>%
  hc_xAxis(type = "datetime", dateTimeLabelFormats = list(day = '%H:%M')) %>%
  hc_add_series(df, type = "scatter",
                hcaes(x = dateTime, y = points)) %>% 
  hc_tooltip(crosshairs = TRUE, dateTimeLabelFormats = list(day = '%H:%M'))

# highchart() %>%
#   hc_xAxis(type = "datetime", dateTimeLabelFormats = list(day = '%H:%M')) %>%
#   hc_add_series(df, type = "scatter",
#                 hcaes(x = dateTime, y = points)) %>% 
#   hc_tooltip(crosshairs = TRUE, dateTimeLabelFormats = '%H:%M')

工具提示格式应类似于x轴格式。

有什么想法吗？

Answer 1

尝试pointFormat。

highchart() %>%
  hc_xAxis(type = "datetime", dateTimeLabelFormats = list(day = '%H:%M')) %>%
  hc_add_series(df, type = "scatter",
                hcaes(x = dateTime, y = points)) %>% 
  hc_tooltip(crosshairs = TRUE, pointFormat = "x: {point.x:%H:%M} <br> y: {point.y}")