11.52 Transparent Plots

% When I do this manually, the order in the legend is alphabetic, as I % want. In knitr it is reveresed.


cities <- c("Canberra", "Darwin", "Melbourne", "Sydney")

ds                                                                    %>%
  filter(location %in% cities)                                        %>%
  ggplot(aes(temp_3pm, colour = location, fill = location))            +
  geom_density(alpha = 0.55)

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