pretty_dates: Computes attractive axis breaks for date-time data

View source: R/pretty.r

pretty_datesR Documentation

Computes attractive axis breaks for date-time data


pretty.dates indentifies which unit of time the sub-intervals should be measured in to provide approximately n breaks. It then chooses a "pretty" length for the sub-intervals and sets start and endpoints that 1) span the entire range of the data, and 2) allow the breaks to occur on important date-times (i.e. on the hour, on the first of the month, etc.)


pretty_dates(x, n, ...)



a vector of POSIXct, POSIXlt, Date, or chron date-time objects


integer value of the desired number of breaks


additional arguments to pass to function


a vector of date-times that can be used as axis tick marks or bin breaks


x <- seq.Date(as.Date("2009-08-02"), by = "year", length.out = 2)
pretty_dates(x, 12)

lubridate documentation built on Sept. 27, 2023, 5:07 p.m.