我怎样才能把几天分成几周？(How can I group days into weeks?)

我怎样才能把几天分成几周？(How can I group days into weeks?)

在R中，我如何在日期（天）和星期的矢量之间进行关联？

编辑：“星期”应该是日期范围内的星期指数，而不是年内。 我对这种含糊不清的道歉。

In R, how can I associate between a vector of dates (days) and weeks?

Edit: "weeks" should be the week index within the date range and not within the year. My apologies for the ambiguity.

最满意答案

你只想要自第一张唱片以来的7天完成时间间隔？

dvec <- as.Date("2001-04-01")+0:90 dweek <- as.numeric(dvec-dvec[1]) %/% 7 dweek[1:21] # [1] 0 0 0 0 0 0 0 1 1 1 1 1 1 1 2 2 2 2 2 2 2

Do you just want the number of completed 7 day intervals since the first record?

dvec <- as.Date("2001-04-01")+0:90 dweek <- as.numeric(dvec-dvec[1]) %/% 7 dweek[1:21] # [1] 0 0 0 0 0 0 0 1 1 1 1 1 1 1 2 2 2 2 2 2 2