我正在尝试制作带有“时间标记”的图表。这些时间标记是某些日期的垂直线。时间数据是POSIXct格式。我想使用Plotly令人敬畏的交互式界面,并在其中使用ggplot对象。
问题在于,使用ggplotly()之后,这些“时间标记”没有显示出来。我已经尝试过使用plotly::add_segments()
,但是它不起作用。
这是两个可复制的示例:
1。使用非POSIXct数据,效果很好
# dummy dataset df2 = data.frame(id = 1:10, measure = runif(10, 0, 20)) events2 = data.frame(number = c(2,3,8)) # ggplot graph p2 = ggplot() + geom_line(data = df2, aes(x = id, y = measure)) + geom_vline(data = events2, aes(xintercept = events2$number), color = "red") p2 # plotly graph that displays the geom_vline properly ggplotly(p2)
2。对于POSIXct,数据无法显示正确的结果
# dummy dataset df = data.frame(date = seq(as.POSIXct("2017-07-01", tz = "UTC", format = "%Y-%m-%d"), as.POSIXct("2018-04-15", tz = "UTC", format = "%Y-%m-%d"), "1 month"), measure = runif(10, 0, 20)) events = data.frame(date_envents = as.POSIXct(c("2017-10-12", "2017-11-12", "2018-03-15"), tz = "UTC", format = "%Y-%m-%d")) # ggplot graph p = ggplot() + geom_line(data = df, aes(x = date, y = measure)) + geom_vline(data = events, aes(xintercept = events$date), color = "red") p # plotly graph that does not display the geom_vline properly ggplotly(p)
我已经看到一些解决方法(例如:Add vertical line to ggplotly plot),但是它很“复杂”。有没有更简单的方法来解决这个问题?
我正在使用Windows 3. R版本3.5.0,RStudio和以下软件包:
library(tidyverse)
和library(plotly)
答案 0 :(得分:2)
一个简单的解决方法是将xintecept
中的geom_vline
设置为数字。
样本数据
df = data.frame(date = seq(as.POSIXct("2017-07-01", tz = "UTC", format = "%Y-%m-%d"),
as.POSIXct("2018-04-15", tz = "UTC", format = "%Y-%m-%d"),
"1 month"),
measure = runif(10, 0, 20))
events = data.frame(date_envents = as.POSIXct(c("2017-10-12", "2017-11-12", "2018-03-15"), tz = "UTC", format = "%Y-%m-%d"))
代码
p = ggplot() + geom_line(data = df, aes(x = date, y = measure)) +
geom_vline(data = events, aes(xintercept = as.numeric(events$date)), color = "red")
结果
ggplotly(p)