Built-in 'RAVE' color palettes — rave-colormaps • ravepipeline

Look up, preview, and interpolate the color palettes shipped with ravepipeline. DISCRETE_COLORMAPS holds qualitative palettes, intended for categorical variables such as electrode groups. CONTINUOUS_COLORMAPS holds sequential and diverging palettes, intended for numeric heat maps; each of its palettes is interpolated to at least 515 stops the first time it is requested, and the interpolation is cached for later calls.

Usage

DISCRETE_COLORMAPS(
  name,
  seed_colors = NULL,
  preview = missing(name),
  error_if_missing = FALSE
)

CONTINUOUS_COLORMAPS(
  name,
  seed_colors = NULL,
  preview = missing(name),
  error_if_missing = FALSE
)

Arguments

name: palette name; when missing, the entire palette table is returned invisibly
seed_colors: optional character vector of colors used in place of the named palette. It applies to this call only: the shared palette table is left unchanged
preview: whether to draw the palette. The default previews the whole table when name is missing, and stays quiet otherwise; pass FALSE explicitly to query the table without drawing
error_if_missing: whether an unknown name raises an error instead of emitting a warning and falling back to "default"

Value

A character vector of colors in #RRGGBB notation; when name is missing, the invisible named list of every palette

Examples


names(DISCRETE_COLORMAPS(preview = FALSE))
#>  [1] "default"        "BeautifulField" "Perm4_0"        "Accent"        
#>  [5] "Dark2"          "Paired"         "Pastel1"        "Pastel2"       
#>  [9] "Set1"           "Set2"           "Set3"           "tab10"         
#> [13] "tab20"          "tab20b"         "tab20c"         "tab22"         
#> [17] "tab25"          "turbo20"        "spectral30"    

DISCRETE_COLORMAPS("tab10")
#>  [1] "#1f77b4" "#ff7f0e" "#2ca02c" "#d62728" "#9467bd" "#8c564b" "#e377c2"
#>  [8] "#7f7f7f" "#bcbd22" "#17becf"

length(CONTINUOUS_COLORMAPS("viridis"))
#> [1] 515

# ad-hoc colors, interpolated but not registered
length(CONTINUOUS_COLORMAPS("scratch", seed_colors = c("#000000", "#FFFFFF")))
#> [1] 515

if(interactive()) {
  DISCRETE_COLORMAPS("Set1", preview = TRUE)
}