Create evenly spaced breaks

Generate a sequence of date breaks for ggplot scales, taking every nth unique date.

Usage

date_breaks_n(dates, n = 6, decreasing = TRUE)

Arguments

dates

A vector of dates.

n

Integer, keep every n-th date (default = 6).

decreasing

Logical, if TRUE (default) sorts dates in descending order.

Value

A vector of dates suitable for use as ggplot2 axis breaks. With the default decreasing = TRUE, the first (most recent) date is always included, so breaks are anchored to the last observation.

See also

date_breaks_gg, which returns a breaks function for scale_x_date() and clips breaks to the plot limits.

Examples

library(ggplot2)
library(dplyr)
#> 
#> Attaching package: ‘dplyr’
#> The following objects are masked from ‘package:stats’:
#> 
#>     filter, lag
#> The following objects are masked from ‘package:base’:
#> 
#>     intersect, setdiff, setequal, union

df <- tibble(
  date = seq.Date(as.Date("2020-01-01"), as.Date("2025-01-01"), by = "month"),
  value = rnorm(61)
)

ggplot(df, aes(date, value)) +
  geom_line() +
  scale_x_date(breaks = date_breaks_n(df$date, 6))