问题描述
使用此答案中的代码, (v0.3.0) 于 2019 年 6 月 2 日创建上>
Using the code from this answer, How to make dots in gganimate appear and not transition, as a MWE, say we have this gganimate:
library(ggplot2)
library(gganimate)
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()
animate(a, nframes = 100)
or
animate(a, fps=5)
Is it possible to control the speed of each Month (time element)? For example, display Month 5 very quickly, ..., Month 9 very slowly.
This is my rudimentary try by making a helper column which can be used as our transition_time
to show how we can have different time step but desired labels.
You can later spend some more time to make a better *timestep
columns which is more sophisticated and precisely meets your needs.
The main idea/point here is that we can use functions on the frame_time
to get the labels as needed while the transition_time
can be manipulated.
library(ggplot2)
library(gganimate)
library(dplyr)
g <- airquality %>%
group_by(Month) %>%
mutate(timestep = if_else(Month==5, ((1:n())-1)/2 + Month, 15 + Month)) %>%
ggplot(aes(Day, Temp, group = interaction(Month, Day))) +
geom_point(color = 'red', size = 1) +
transition_time(timestep) +
shadow_mark(colour = 'black', size = 0.75) +
enter_fade() +
labs(title = 'Month: {if_else(frame_time<21,5, ceiling(frame_time-15))}')
animate(g, nframes = 100)
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