March 2018
Intermediate to advanced
528 pages
13h 2m
Portuguese (Portugal, Brazil)
Content preview from R para Data Science
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242 | Capítulo 13: Datas e Horas com lubridate
Ou em um único dia:
flights_dt %>%
filter( dep_time < ymd( 20130102 )) %>%
ggplot( aes( dep_time )) +
geom_freqpoly( binwidth = 600 ) # 600 s = 10 minutes
Note que quando você usa datas-horas em um contexto numérico (como em um
histograma), 1 significa 1 segundo, então um binwidth de 86400 significa 1 dia. Para
datas, 1 significa 1 dia.
A Partir de Outros Tipos
Caso queira mudar entre uma data-hora e uma data, opte por as_datetim e() e
as_date():
as_datetim
e
(
today
())
#> [1] "2016-10-10 UTC"
as_dat
e( now ())
#> [1] "2016-10-10"
Às vezes você obterá datas/horas como offsets numéricos de “Unix Epoch, ...
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