Phân ô (faceting) để khám phá dữ liệu thiếu (nhiều biểu đồ)

# Use geom_miss_point() and facet_wrap to explore how the missingness  
# in wind_ew and air_temp_c is different for missingness of humidity
bind_shadow(oceanbuoys) %>%
  ggplot(aes(x = ___,
           y = ___)) + 
  geom_miss_point() + 
  facet_wrap(~___)

# Use geom_miss_point() and facet_grid to explore how the missingness in wind_ew and air_temp_c 
# is different for missingness of humidity AND by year - by using `facet_grid(humidity_NA ~ year)`
bind_shadow(oceanbuoys) %>%
  ggplot(aes(x = ___,
             y = ___)) + 
  geom_miss_point() + 
  facet_grid(humidity_NA~year)