Define size for .gif created by gganimate - change dimension / resolution

Question

I'm using gganimate to create some .gif files that I want to insert into my reports. I'm able to save the files and view them fine, however, I find that the displayed size is small: 480x480. Is there a way to adjust that - perhaps along the lines of height and width arguments in ggsave()?

I can zoom in but that impacts the quality poorly and makes it rather unreadable for my use case.

Here's some sample code:

gplot <- 
  ggplot(gapminder, 
         aes(x = gdpPercap, y = lifeExp, colour = continent, 
             size = pop, 
             frame = year)) +
    geom_point(alpha = 0.6) + 
    scale_x_log10()

gganimate(gplot, "test.gif")

Below is the output for this code.

Answer 1

There can be issues with using the magick package.

I think a better solution is use the animate() function in gganimate to create an object which is then passed to the anim_save() function. No need to use another package.

library(gganimate)
library(gapminder)

my.animation <- 
  ggplot(
  gapminder,
  aes(x = gdpPercap, y = lifeExp, colour = continent, size = pop)
 ) +
geom_point(alpha = 0.6) +
scale_x_log10() +
transition_time(year)

# animate in a two step process:
animate(my.animation, height = 800, width =800)
anim_save("Gapminder_example.gif")