Using {frame_time} in the title for year shows non-integers

[jzadra]

When I use transition_time(year) and put "year: {year}" in the title, I get titles like "2017.285183", "2017.486" etc, building up through non-integers.

[jzadra]

I figured this out. If the numeric value being used, ie year, is type double, you will get this behavior. If it is type integer, it works correctly.

If this isn't intended, might be good to treat variables that could be integer as integer.

Example:

library(gapminder)
library(gganimate)
#> Loading required package: ggplot2
library(tidyverse)

gapminder %>% 
  mutate(year = as.numeric(year)) %>% 
  ggplot(aes(gdpPercap, lifeExp, size = pop, colour = country)) +
  geom_point(alpha = 0.7, show.legend = FALSE) +
  scale_colour_manual(values = country_colors) +
  scale_size(range = c(2, 12)) +
  scale_x_log10() +
  facet_wrap(~continent) +
  # Here comes the gganimate specific bits
  labs(title = 'Year: {frame_time}', x = 'GDP per capita', y = 'life expectancy') +
  transition_time(year) +
  ease_aes('linear')

^{Created on 2019-02-19 by the reprex package (v0.2.1)}

[UNFPAmaldives]

The solution, I read elsewhere, is to change your year variable to integer, and then, instead of transition_time, use transition_states, e.g.:

labs(title = 'Year: {closest_state}', x = 'GDP per capita', y = 'life expectancy (years)') +
transition_states(year, transition_length = 1, state_length = 1) +
ease_aes('linear')  

[thomasp85]

No need for that — just put ”Year: {as.integer(frame_time)}” as your title

[KucherP]

But, if I need to show not year (like 2012, 2013 etc), but period (2012-1, 2012-2 etc). How to do that?

[thomasp85]

However you’d usually do this with R code. You can basically stick whatever code inside {} that returns something coercive to a character

[Deleetdk]

Simple solution is to use "Year: {format(frame_time, '%Y-%m')}" which gives you stuff like 2012-1, 2012-2.

[highclef93]

Hello, I think I have a similar problem, I want to add evolving date and time(minutes) to the title of my ggplot animate,
I'm new to R, I need help please