Use the package lubridate. it has a function isoweek() which gives you the ISOWeek of a given date lubridate::isoweek("2017-11-18") [1] 46. ... <看更多>

I added the "Gregorian"/"ISO" labels. Note the week numbers shown on the left. Weeks 52 & 1 changed to weeks 52 & 53 . In ... ... <看更多>

What's the Current Week Number? - Epoch Converter2021 has 52 weeks. ISO 8601 is not the only week numbering system in the world, other systems use weeks ... ... <看更多>

What's the Current Week Number? - Epoch Converter2021 has 52 weeks. ISO 8601 is not the only week numbering system in the world, other systems use weeks ... ... <看更多>

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From http://man7.org/linux/man-pages/man3/strftime.3.html: The ISO 8601 week number (see NOTES) of the current year as a decimal number, ... ... <看更多>