Create your own discrete scale — scale_fill

These functions allow you to specify your own set of mappings from levels in the data to aesthetic values.

scale_fill_hcl(..., palette = "RdYlBu", reverse = FALSE)

Arguments

...

...	Arguments passed on to `ggplot2::discrete_scale` `scale_name` The name of the scale that should be used for error messages associated with this scale. `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. If `NULL`, the legend title will be omitted. `breaks` One of: `NULL` for no breaks `waiver()` for the default breaks (the scale limits) A character vector of breaks A function that takes the limits as input and returns breaks as output. Also accepts rlang lambda function notation. `labels` One of: `NULL` for no labels `waiver()` for the default labels computed by the transformation object A character vector giving labels (must be same length as `breaks`) A function that takes the breaks as input and returns labels as output. Also accepts rlang lambda function notation. `limits` One of: `NULL` to use the default scale values A 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. `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`. `na.value` If `na.translate = TRUE`, what aesthetic value should the missing values be displayed as? Does not apply to position scales where `NA` is always placed at the far right. `drop` Should unused factor levels be omitted from the scale? The default, `TRUE`, uses the levels that appear in the data; `FALSE` uses all the levels in the factor. `guide` A function used to create a guide or its name. See `guides()` for more information. `super` The super class to use for the constructed scale
palette	the name of the palette to generate colors from. A list of all available palettes can be found by running `colorspace::hcl_palettes()` (default is "RdYlBu").
reverse	If `TRUE`, the order of the colors is reversed (default is `FALSE`)'

Arguments passed on to ggplot2::discrete_scale

scale_name

The name of the scale that should be used for error messages associated with this scale.

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. If NULL, the legend title will be omitted.

breaks

One of:

NULL for no breaks
waiver() for the default breaks (the scale limits)
A character vector of breaks
A function that takes the limits as input and returns breaks as output. Also accepts rlang lambda function notation.

labels

One of:

NULL for no labels
waiver() for the default labels computed by the transformation object
A character vector giving labels (must be same length as breaks)
A function that takes the breaks as input and returns labels as output. Also accepts rlang lambda function notation.

limits

One of:

NULL to use the default scale values
A 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.

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.

na.value

If na.translate = TRUE, what aesthetic value should the missing values be displayed as? Does not apply to position scales where NA is always placed at the far right.

drop

Should unused factor levels be omitted from the scale? The default, TRUE, uses the levels that appear in the data; FALSE uses all the levels in the factor.

guide

A function used to create a guide or its name. See guides() for more information.

super

The super class to use for the constructed scale

palette

the name of the palette to generate colors from. A list of all available palettes can be found by running colorspace::hcl_palettes() (default is "RdYlBu").

reverse

If TRUE, the order of the colors is reversed (default is FALSE)'

Value

Scale layer for the fill aesthetic.

Details

The functions `scale_colour_manual()`, `scale_fill_manual()`, `scale_size_manual()`, etc. work on the aesthetics specified in the scale name: `colour`, `fill`, `size`, etc. However, the functions `scale_colour_manual()` and `scale_fill_manual()` also have an optional `aesthetics` argument that can be used to define both `colour` and `fill` aesthetic mappings via a single function call (see examples). The function `scale_discrete_manual()` is a generic scale that can work with any aesthetic or set of aesthetics provided via the `aesthetics` argument.