如何使gganimate中的点出现而不过渡 [英] How to make dots in gganimate appear and not transition

问题描述

我正在使用gganimate.说我有这个MWE:

I am using gganimate. Say I have this MWE:

library(ggplot2)
library(gganimate)
ggplot(airquality, aes(Day, Temp)) +
    geom_point(color = 'red', size = 1) +
    transition_time(Month) +
    shadow_mark(colour = 'black', size = 0.75)

我有一个问题:我怎样才能使新的要点显示出来而不是从旧的要点过渡出来?换句话说，我只希望新点出现在它们的最终位置并且没有过渡.我应该如何修改代码?

I have one question: how can I make the new points just appear as opposed to transitioning from the old ones? Put another way, I just want the new dots to appear at their final location and not have a transition. How should I modify the code?

推荐答案

转换最终与每个数据点的 group 相关.在您的代码中，第1天的所有数据点都共享一个组，因此它们从旧的开始出现.

The transitions are ultimately tied to each data point's group. In your code, all the Day 1 data points are sharing a group, and so they appear from the old ones.

将点赋予自己的组(例如，通过使用 group =交互(月，日))，它应该可以工作.

Give the points their own group (e.g. by using group = interaction(Month, Day)) and it should work.

a <- ggplot(airquality, aes(Day, Temp, 
                            group = interaction(Month, Day))) +
  geom_point(color = 'red', size = 1) +
  transition_time(Month) +
  shadow_mark(colour = 'black', size = 0.75) +
  enter_fade()  # I liked the look of this, but fine to leave out
animate(a, nframes = 100)

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