This package contains functions which provide a range of axis labeling algorithms, most notably the "extended" algorithm described in Talbot et al.'s An Extension of Wilkinson’s Algorithm for Positioning Tick Labels on Axes. They are used in ggplot2, through the scales package.
For implementation details, see /cran-package/R/labeling.R. For instructions and usage examples, see labeling-manual.pdf. For complaints and bugs, send me a message to the mantainer email or file a Github issue.