Countries moving around when using gganimate

Asked Nov 08 '18 at 13:26

Active Nov 08 '18 at 13:26

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I'm animating a map with percentage of deaths in Africa caused by HIV/AIDS. For some years the animation works well, but for other years the countries are sort of jumping around. The data can be found here. My code is shown below

library(sf)
library(rworldmap)
library(transformr)
library(gganimate)
library(tidyverse)

mortality <– read_csv("path_to_file")

africa_map <- getMap(resolution = "low") %>% st_as_sf() %>% 
 filter(continent == "Africa")

mortality %>% filter(region == "Africa", disease == "HIV/AIDS") %>% 
 mutate(year = as.integer(year(year))) %>% drop_na() %>% 
 left_join(africa_map, by = c("country_code" = "SOV_A3")) %>% 
 ggplot() + geom_sf(aes(fill = percent)) +
 transition_time(year) +
 labs(title = "Year: {frame_time}")

Any idea how to fix this?

asked Nov 08 '18 at 13:26

Rasmus Fisker Bang

3

Use `transition_manual(year) + labs(title = "Year: {current_frame}")` but you'll have to make sure there values for all the polygons or they'll "go missing" between frames. – hrbrmstr Nov 08 '18 at 13:56
@hrbrmstr Thank you. That helped. – Rasmus Fisker Bang Nov 08 '18 at 14:16
i gotta say, tho, that the moving countries was kind of cool :-) – hrbrmstr Nov 08 '18 at 14:16
That would be interesting! – Rasmus Fisker Bang Nov 08 '18 at 14:17

Countries moving around when using gganimate

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