Ordered Proportional Symbol

library(tidyverse)    # untuk manupulasi, merapikan, & visualisasi data
library(gapminder)    # untuk mengakses gapminder dataset

our_palette <-c('#660d20',
                '#e59a52',
                '#edce79',
                '#094568',
                '#e1c59a')

ordered_prop_symbol_df <- gapminder %>%
  group_by(continent) %>%
  summarize(medianlifeExp = median(lifeExp))

ordered_prop_symbol <- ordered_prop_symbol_df %>%
  ggplot(aes(x = reorder(continent, -medianlifeExp),
             y = 0,
             color = reorder(continent, -medianlifeExp),
             fill = reorder(continent, -medianlifeExp))) +
  geom_point(aes(size = medianlifeExp),
             show.legend = FALSE) +
  scale_size_area(max_size = 40) +
  scale_color_manual(values = our_palette,
                     guide = 'none') +
  scale_fill_manual(values = our_palette,
                    guide = 'none') +
  scale_y_continuous(limits = c(-1, 1)) +
  theme_minimal() +
  theme(
    axis.title = element_blank(),
    axis.text = element_blank(),
    axis.line = element_blank(),
    panel.grid.major = element_blank(),
    panel.grid.minor = element_blank(),
    panel.background = element_rect(fill = '#FFFFFF',
                                    color = NA),
    plot.background = element_rect(fill = '#FFFFFF',
                                   color = '#FFFFFF')
  )