如何将几天分成几周？

本文介绍了如何将几天分成几周？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

编辑：周应该是日期范围内的星期索引而不是在一年内。我对于歧义感到歉意。

解决方案

您是否只想要自第一条记录以来完成的7天间隔的数量？

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

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.

解决方案

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