Hide part of a chart caption

Question

I have a chart made with ggplot2, in the legend is appearing a size and I’d like to remove it, but I don’t know how.

My code:

updates %>%
    mutate(mortalidade = deaths / confirmed) %>%
    filter(iso3c %in% paises, date == max(date) - 1) %>%
    arrange(desc(mortalidade)) %>%
    select(country, mortalidade, region) %>%
    na.omit() %>%
    ggplot() +
    geom_col(aes(x = reorder(country, - mortalidade), y = mortalidade, fill = na.omit(region))) +
    geom_text(aes(x = country, y = mortalidade, label =  percent(round(mortalidade, 2)),
              vjust = -0.15, size = 3)) +
    scale_y_continuous(labels = percent_format(accuracy = 1)) +
    scale_fill_economist() +
    labs(x = "", y = "", fill = "") +
    theme(legend.position = "bottom",
          text = element_text(size = 10), axis.text.x = element_text(angle = 90, hjust = 1),
          panel.background = element_rect(fill = "white", colour = "grey10"),
          panel.grid.major = element_line(colour = "gray", linetype = "solid"))

My chart:

I’d like to withdraw that size A3. If you think it necessary, I’ll put the dput() of my data.

Answer 1

ggplot includes in the captions all the variables specified within the aesthetics (except the axes). If the value used for some form (in your case, text size) is constant or independent of some variable from your dataset, put it outside the aes:

library(ggplot2)

dados <- diamonds[1:4,]

ggplot(dados, aes(clarity, table)) +
  geom_col(aes(fill = cut)) +
  geom_text(aes(label = carat), size = 4, nudge_y = 3)

If you need to map a variable to a geometry but you don’t want it to appear in the caption, use the option show.legend = FALSE. For example:

ggplot(dados, aes(clarity, table)) +
  geom_col(aes(fill = cut), show.legend = FALSE)