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 nearest ceiling time resolution. 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