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Asked: 2026-05-26T21:29:57+00:00

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

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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.

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1 Answer

  1. Editorial Team

    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
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