Discrete colour fill scales for Analysis Function plots

Usage

scale_fill_discrete_af(
  palette = "categorical",
  palette_type = c("af"),
  reverse = FALSE,
  na.value = afcharts::af_pale_grey,
  ...
)

Arguments

palette: Name of palette to use from af_colour_palettes; e.g. "categorical", "sequential", "focus". Default value is "categorical".
palette_type: Currently only the Analysis Function palettes are supported. Defaults to "af".
reverse: Boolean value to indicate whether the palette should be reversed.
na.value: Colour to set for missing values.
...: Additional arguments passed to scale type.

Value

ggplot2 discrete fill scale

Details

If the palette is set to "categorical" or "sequential" and fewer than the maximum number of colours are required then the colours will be used in the correct order following the analysis function guidance.

E.g. If only two colours are required and the palette is set to "categorical" then the "categorical2" palette will be used instead, without warning.

Examples

library(ggplot2)

d <- subset(mpg, manufacturer == "ford")

ggplot(d, aes(x = class, fill = class)) +
 geom_bar() +
 scale_fill_discrete_af()



# The Analysis Function guidance recommends using a dark blue outline on
# barcharts with a sequential colour palette

d2 <- data.frame(
  age = c("<25", "25-44", "45-54", "55-64", "65 plus"),
  score = c(20, 34, 44, 88, 90)
)

ggplot(d2, aes(x = age, y = score, fill = age)) +
  geom_col(colour = af_dark_blue) +
  scale_fill_discrete_af(palette = "sequential")