Add tidsvariabler

Add variables aar, maaned_nr (numerical month) and maaned (year + month) in data set based in dato_pros.

utlede_tidsvariabler(df)

Arguments

df

data.frame with ablanor-data. Must contain dato_pros.

Value

Returns df with 3 new columns

Examples

 df <- data.frame(
dato_pros = as.Date(c("2021-10-05", "1998-01-16", "2020-07-07"),
                    format = "%Y-%m-%d"))
ablanor::utlede_tidsvariabler(df)
#>    dato_pros  aar maaned_nr  maaned
#> 1 2021-10-05 2021        10 2021-10
#> 2 1998-01-16 1998        01 1998-01
#> 3 2020-07-07 2020        07 2020-07