Automatically select appropriate color scale

which_pal_scale(
  mapping,
  palette = "ggplot2",
  data = NULL,
  fill_type = c("continuous", "discrete"),
  color_type = c("continuous", "discrete")
)

Arguments

mapping	Aesthetics used in `ggplot`.
palette	Color palette
data	An optional `data.frame` to choose the right type for variables.
fill_type	Scale to use according to the variable used in `fill` : `"discrete"` or `"continuous"`.
color_type	Scale to use according to the variable used in `color` : `"discrete"` or `"continuous"`.

Value

a list

Examples

library(ggplot2)

# Automatic guess according to data
which_pal_scale(
  mapping = aes(fill = Sepal.Length), 
  palette = "ggplot2", 
  data = iris
)
#> $scales
#> [1] "scale_fill_gradient"
#> 
#> $args
#> list()
#> 
which_pal_scale(
  mapping = aes(fill = Species),
  palette = "ggplot2", 
  data = iris
)
#> $scales
#> [1] "scale_fill_hue"
#> 
#> $args
#> list()
#> 


# Explicitly specify type
which_pal_scale(
  mapping = aes(color = variable), 
  palette = "Blues", 
  color_type = "discrete"
)
#> $scales
#> [1] "scale_color_brewer"
#> 
#> $args
#> $args$scale_color_brewer
#> $args$scale_color_brewer$palette
#> [1] "Blues"
#> 
#> 
#> 


# Both scales
which_pal_scale(
  mapping = aes(color = var1, fill = var2), 
  palette = "Blues", 
  color_type = "discrete",
  fill_type = "continuous"
)
#> $scales
#> [1] "scale_fill_distiller" "scale_color_brewer"  
#> 
#> $args
#> $args$scale_fill_distiller
#> $args$scale_fill_distiller$palette
#> [1] "Blues"
#> 
#> 
#> $args$scale_color_brewer
#> $args$scale_color_brewer$palette
#> [1] "Blues"
#> 
#> 
#>