scale_units {units}

R Documentation

Position scales for units data

Description

These are the default scales for the units class. These will usually be added automatically. To override manually, use scale_*_units.

Usage

scale_x_units(..., position = "bottom", unit = NULL)

scale_y_units(..., unit = NULL)

Arguments

...	arguments passed on to continuous_scale.
position	For position scales, The position of the axis. left or right for y axes, top or bottom for x axes.
unit	A unit specification to use for the axis. If given, the values will be converted to this unit before plotting. An error will be thrown if the specified unit is incompatible with the unit of the data.

Examples

Run examples

if (requireNamespace("ggplot2", quietly=TRUE)) {

library(ggplot2)

mtcars$consumption <- set_units(mtcars$mpg, mi / gallon)
mtcars$power <- set_units(mtcars$hp, hp)

# Use units encoded into the data
ggplot(mtcars) +
  geom_point(aes(power, consumption))

# Convert units on the fly during plotting
ggplot(mtcars) +
  geom_point(aes(power, consumption)) +
  scale_x_units(unit = "W") +
  scale_y_units(unit = "km/l")

# Resolve units when transforming data
ggplot(mtcars) +
  geom_point(aes(power, 1 / consumption))

}

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