Discrete scale constructor.
discrete_scale(aesthetics, scale_name, palette, name = waiver(), breaks = waiver(), labels = waiver(), limits = NULL, expand = waiver(), na.translate = TRUE, na.value = NA, drop = TRUE, guide = "legend", position = "left", super = ScaleDiscrete)
aesthetics | The names of the aesthetics that this scale works with |
---|---|
scale_name | The name of the scale |
palette | A palette function that when called with a single integer argument (the number of levels in the scale) returns the values that they should take |
name | The name of the scale. Used as axis or legend title. If
|
breaks | One of:
|
labels | One of:
|
limits | A character vector that defines possible values of the scale and their order. |
expand | Vector of range expansion constants used to add some
padding around the data, to ensure that they are placed some distance
away from the axes. Use the convenience function |
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.value | If |
drop | Should unused factor levels be omitted from the scale?
The default, |
guide | A function used to create a guide or its name. See
|
position | The position of the axis. "left" or "right" for vertical scales, "top" or "bottom" for horizontal scales |
super | The super class to use for the constructed scale |