最近在学习使用gganimate包制作动态图,但是在使用包的过程中出现了报错
代码是copy的一个网上的教程里的例子,但是出现了报错
temp.gapminder = gapminder
select.country = c(as.character(head(temp.gapminder$country[temp.gapminder$year==2007][order(temp.gapminder$pop[temp.gapminder$year==2007],decreasing = TRUE)],8)))
temp.gapminder = temp.gapminder[temp.gapminder$country %in% select.country,]
temp.gapminder$country = factor(temp.gapminder$country, order = TRUE, levels = select.country)
p = ggplot(temp.gapminder, aes(country, lifeExp, fill=country)) +
geom_bar(stat= 'identity', position = 'dodge',show.legend = FALSE) +
theme(axis.text.x = element_text(angle = 45, hjust = 0.5, vjust = 0.5)) +
labs(title = 'Year: {frame_time}', x = 'country', y = 'life expectancy') +
transition_time(year) +
ease_aes('linear')
p
Error: The png package is required to use gifski_renderer
这个报错信息是提示我装什么软件吗?还请各位大神指教