dates <- NULL
date <- as.Date("01/01/2014","%d/%m/%Y")
dates <- data.frame(date=as.Date(character())
,cal_day_in_year_num = numeric()
,cal_week_id = numeric()
,cal_week_start_date = as.Date(character())
,cal_week_end_date = as.Date(character())
)
for (i in 1:365) {
dates[i,1] <- date + days(i-1) ## date
dates[i,2] <- yday(dates[i,1]) ## cal_day_in_year_num
dates[i,3] <- paste(year(dates[i,1]),sprintf("%02d",week(dates[i,1])),sep="") ## cal_week_id
dates[i,4] <- floor_date(dates[i,1], "week") ## cal_week_start_date
dates[i,5] <- ceiling_date(dates[i,1], "week") ## cal_week_end_date
}
View(dates)
对于给定的日期，我正在尝试使用 lubridate 函数来计算相应的一周的开始和结束日期
我遇到的问题是 lubridate 将一周的第一天定为星期日，而我需要将其定为星期一 - 有没有人有办法解决这个问题？
最佳答案
您可以在 base 中创建自己的函数来执行此操作。例如，
start.of.week <- function(date)
date - (setNames(c(6,0:5),0:6) [strftime(date,'%w')])
end.of.week <- function(date)
date + (setNames(c(0,6:1),0:6) [strftime(date,'%w')])
start.of.week(as.Date(c('2014-01-05','2014-10-02','2014-09-22','2014-09-27')))
# "2013-12-30" "2014-09-29" "2014-09-22" "2014-09-22"
end.of.week(as.Date(c('2014-01-05','2014-10-02','2014-09-22','2014-09-27')))
# "2014-01-05" "2014-10-05" "2014-09-28" "2014-09-28"
关于r - 将 lubridate 功能更改为在星期一而不是星期日开始，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/26160117/