sec_axis

0th

Percentile

Specify a secondary axis

This function is used in conjunction with a position scale to create a secondary axis, positioned opposite of the primary axis. All secondary axes must be based on a one-to-one transformation of the primary axes.

Usage
sec_axis(trans = NULL, name = waiver(), breaks = waiver(), labels = waiver())
dup_axis(trans = ~., name = derive(), breaks = derive(), labels = derive())
derive()
Arguments
trans
A transformation formula
name
The name of the secondary axis
breaks
One of:
  • NULL for no breaks
  • waiver() for the default breaks computed by the transformation object
  • A numeric vector of positions
  • 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
Details

sec_axis is used to create the specifications for a secondary axis. Except for the trans argument any of the arguments can be set to derive() which would result in the secondary axis inheriting the settings from the primary axis.

dup_axis is provide as a shorthand for creating a secondary axis that is a duplication of the primary axis, effectively mirroring the primary axis.

Aliases
  • sec_axis
  • dup_axis
  • derive
Examples
library(ggplot2) p <- ggplot(mtcars, aes(cyl, mpg)) + geom_point() # Create a simple secondary axis p + scale_y_continuous(sec.axis = sec_axis(~.+10)) # Inherit the name from the primary axis p + scale_y_continuous("Miles/gallon", sec.axis = sec_axis(~.+10, name = derive())) # Duplicate the primary axis p + scale_y_continuous(sec.axis = dup_axis()) # You can pass in a formula as a shorthand p + scale_y_continuous(sec.axis = ~.^2)
Documentation reproduced from package ggplot2, version 2.2.1, License: GPL-2 | file LICENSE

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