Arredondando datetimes

Trabalhando com datas e horários no R

Charlotte Wickham

Instructor

Arredondar vs. extrair

release_time <- releases$datetime
head(release_time)

"1997-12-04 08:47:58 UTC" "1997-12-21 13:09:22 UTC"
"1998-01-10 00:31:55 UTC" "1998-03-14 19:25:55 UTC"
"1998-05-02 07:58:17 UTC" "1998-06-14 12:56:20 UTC"

head(release_time) %>% hour()

8 13  0 19  7 12

head(release_time) %>% floor_date(unit = "hour")

"1997-12-04 08:00:00 UTC" "1997-12-21 13:00:00 UTC"
"1998-01-10 00:00:00 UTC" "1998-03-14 19:00:00 UTC"
"1998-05-02 07:00:00 UTC" "1998-06-14 12:00:00 UTC"

Arredondando no lubridate

round_date() - arredonda para o mais próximo
ceiling_date() - arredonda para cima
floor_date() - arredonda para baixo
Valores possíveis de unit:
- "second", "minute", "hour", "day", "week", "month", "bimonth", "quarter", "halfyear" ou "year".
- Ou múltiplos, por exemplo "2 years", "5 minutes"

Vamos praticar!

Trabalhando com datas e horários no R