scales (version 1.4.0)

breaks_extended: Automatic breaks for numeric axes

Description

Uses Wilkinson's extended breaks algorithm as implemented in the labeling package.

Usage

breaks_extended(n = 5, ...)

Value

All breaks_() functions return a function for generating breaks. These functions takes, as their first argument a vector of values that represent the data range to provide breaks for. Some will optionally take a second argument that allows you to specify the number of breaks to recieve.

Arguments

n

Desired number of breaks. You may get slightly more or fewer breaks that requested.

...

other arguments passed on to labeling::extended()

References

Talbot, J., Lin, S., Hanrahan, P. (2010) An Extension of Wilkinson's Algorithm for Positioning Tick Labels on Axes, InfoVis 2010 http://vis.stanford.edu/files/2010-TickLabels-InfoVis.pdf.

Examples

demo_continuous(c(0, 10))
demo_continuous(c(0, 10), breaks = breaks_extended(3))
demo_continuous(c(0, 10), breaks = breaks_extended(10))