由于我的消息,我已经安装了transformr
和gifski
包。为什么以下代码不起作用?我收到很多消息:
geom_path: Each group consists of only one observation. Do you need to adjust the group aesthetic?
library(gapminder)
library(gganimate)
library(gifski)
library(transformr)
library(dplyr) # For %>% and filter and %in%
library(ggplot2)
gapminder %>%
filter(country %in% c("Afghanistan", "United States")) %>%
ggplot() +
geom_line(aes(year, pop, group=country)) +
transition_time(year)
我已经解决了这个问题。我需要使用transition_reveal
而不是transition_time
。