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Symbol Mapping

Source: R/palettes.R
palette_shape.Rd

Symbol Mapping

Usage

palette_shape(symbols = NULL, domain = NULL, ordered = FALSE, ...)

palette_line(types = NULL, domain = NULL, ordered = FALSE, ...)

Arguments

symbols, types

A vector of symbols or line types.

domain

A vector of categorical data specifying the possible values that can be mapped.

ordered

A logical scalar: should the levels be treated as already in the correct order?

...

Currently not used.

Value

A palette function that when called with a single argument (a character vector of categorical values) returns a vector of symbols.

See also

Other palettes: palette_color_continuous(), palette_color_discrete(), palette_color_picker(), palette_size_range()

Examples

## Build color palette functions
bright <- c(versicolor = "#4477AA", virginica = "#EE6677", setosa = "#228833")
pal_color <- palette_color_discrete(colors = bright)

## Build symbol palette functions
symbols <- c(versicolor = 15, virginica = 16, setosa = 17)
pal_shapes <- palette_shape(symbols)

## Plot
plot(
  x = iris$Petal.Length,
  y = iris$Sepal.Length,
  pch = pal_shapes(iris$Species),
  col = pal_color(iris$Species),
  xlab = "Petal length",
  ylab = "Sepal length",
  panel.first = grid(),
  las = 1
)
legend("topleft", legend = names(bright), col = bright, pch = symbols)