adjust_luminance | R Documentation |
The adjust_luminance()
function can brighten or darken a palette of colors
by an arbitrary number of steps, which is defined by a real number between
-2.0 and 2.0. The transformation of a palette by a fixed step in this
function will tend to apply greater darkening or lightening for those colors
in the midrange compared to any very dark or very light colors in the input
palette.
adjust_luminance(colors, steps)
colors |
A vector of colors that will undergo an adjustment in
luminance. Each color value provided must either be a color name (in the
set of colors provided by |
steps |
A positive or negative factor by which the luminance will be
adjusted. Must be a number between |
This function can be useful when combined with the data_color()
function's
palette
argument, which can use a vector of colors or any of the col_*
functions from the scales package (all of which have a palette
argument).
A vector of color values.
Get a palette of 8 pastel colors from the RColorBrewer package.
pal <- RColorBrewer::brewer.pal(8, "Pastel2")
Create lighter and darker variants of the base palette (one step lower, one step higher).
pal_darker <- pal |> adjust_luminance(-1.0) pal_lighter <- pal |> adjust_luminance(+1.0)
Create a tibble and make a gt table from it. Color each column in order
of increasingly darker palettes (with data_color()
).
dplyr::tibble(a = 1:8, b = 1:8, c = 1:8) |> gt() |> data_color( columns = a, colors = scales::col_numeric( palette = pal_lighter, domain = c(1, 8) ) ) |> data_color( columns = b, colors = scales::col_numeric( palette = pal, domain = c(1, 8) ) ) |> data_color( columns = c, colors = scales::col_numeric( palette = pal_darker, domain = c(1, 8) ) )
8-23
v0.2.0.5
(March 31, 2020)
Other helper functions:
cell_borders()
,
cell_fill()
,
cell_text()
,
cells_body()
,
cells_column_labels()
,
cells_column_spanners()
,
cells_footnotes()
,
cells_grand_summary()
,
cells_row_groups()
,
cells_source_notes()
,
cells_stub_grand_summary()
,
cells_stub_summary()
,
cells_stubhead()
,
cells_stub()
,
cells_summary()
,
cells_title()
,
currency()
,
default_fonts()
,
escape_latex()
,
google_font()
,
gt_latex_dependencies()
,
html()
,
md()
,
pct()
,
px()
,
random_id()
,
stub()
,
system_fonts()
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