Designed for use with layer_group_data. group_data_pal generates palettes that are passed to ggplot2::scale_fill_manual and ggplot2::scale_color_manual.
Usage
scale_group_data(
...,
data,
col = NULL,
palette = NULL,
n = NULL,
direction = 1,
na.value = "grey50",
drop = FALSE,
limits = NULL,
aesthetics = "fill"
)
group_data_pal(
data,
palette = NULL,
col = NULL,
n = NULL,
direction = 1,
pkg = NULL
)
get_group_data_pal_scale(data, col = NULL, palette = NULL, ...)
Arguments
- ...
Arguments passed on to
discrete_scale
limits
One of:
NULL
to use the default scale valuesA character vector that defines possible values of the scale and their order
A function that accepts the existing (automatic) values and returns new ones. Also accepts rlang lambda function notation.
drop
Should unused factor levels be omitted from the scale? The default,
TRUE
, uses the levels that appear in the data;FALSE
includes the levels in the factor. Please note that to display every level in a legend, the layer should useshow.legend = TRUE
.na.translate
Unlike continuous scales, discrete scales can easily show missing values, and do so by default. If you want to remove missing values from a discrete scale, specify
na.translate = FALSE
.name
The name of the scale. Used as the axis or legend title. If
waiver()
, the default, the name of the scale is taken from the first mapping used for that aesthetic. IfNULL
, the legend title will be omitted.labels
One of:
NULL
for no labelswaiver()
for the default labels computed by the transformation objectA character vector giving labels (must be same length as
breaks
)An expression vector (must be the same length as breaks). See ?plotmath for details.
A function that takes the breaks as input and returns labels as output. Also accepts rlang lambda function notation.
guide
A function used to create a guide or its name. See
guides()
for more information.call
The
call
used to construct the scale for reporting messages.super
The super class to use for the constructed scale
- data
Data to use when generating scale or palette.
- col
Grouping column found in data to use in generating scale or palette; defaults to
NULL
.- palette
Name of palette as a string. Must be on the form packagename::palettename.
- n
Number of colors desired. If omitted, returns complete palette.
- direction
Either
1
or-1
. If-1
the palette will be reversed.- na.value
The aesthetic value to use for missing (
NA
) values- drop
Should unused factor levels be omitted from the scale? The default,
TRUE
, uses the levels that appear in the data;FALSE
includes the levels in the factor. Please note that to display every level in a legend, the layer should useshow.legend = TRUE
.- limits
One of:
NULL
to use the default scale valuesA character vector that defines possible values of the scale and their order
A function that accepts the existing (automatic) values and returns new ones. Also accepts rlang lambda function notation.
- aesthetics
Character string or vector of character strings listing the name(s) of the aesthetic(s) that this scale works with. This can be useful, for example, to apply colour settings to the
colour
andfill
aesthetics at the same time, viaaesthetics = c("colour", "fill")
.- pkg
Package name to use as prefix for palette name when selecting a palette with
paletteer::paletteer_d()