Guess a time frequency from other index objects

Stable lifecycle

A possible frequency passed to the ts() function

guess_frequency(x)

Arguments

x

An index object including "yearmonth", "yearquarter", "Date" and others.

Details

If a series of observations are collected more frequently than weekly, it is more likely to have multiple seasonalities. This function returns a frequency value at its smallest. For example, hourly data would have daily, weekly and annual frequencies of 24, 168 and 8766 respectively, and hence it gives 24.

References

https://robjhyndman.com/hyndsight/seasonal-periods/

Examples

guess_frequency(yearquarter(seq(2016, 2018, by = 1 / 4)))
#> [1] 4
guess_frequency(yearmonth(seq(2016, 2018, by = 1 / 12)))
#> [1] 12
guess_frequency(seq(as.Date("2017-01-01"), as.Date("2017-01-31"), by = 1))
#> [1] 7
guess_frequency(seq(
  as.POSIXct("2017-01-01 00:00"), as.POSIXct("2017-01-10 23:00"),
  by = "1 hour"
))
#> [1] 24