R: Discrete scale constructor.

discrete_scale {ggplot2}

R Documentation

Discrete scale constructor.

Description

Discrete scale constructor.

Usage

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)

Arguments

`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 `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 computed by the transformation object A character vector of breaks A function that takes the limits as input and returns breaks as output
`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
`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 `expand_scale()` to generate the values for the `expand` argument. The defaults are to expand the scale by 5% on each side for continuous variables, and by 0.6 units on each side for discrete variables.
`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 value aesthetic value should missing 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 info.
`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

[Package ggplot2 version 3.0.0 Index]