week: Get/set weeks component of a date-time.

Description Usage Arguments Value References See Also Examples

View source: R/accessors-week.r

Description

week returns the number of complete seven day periods that have occured between the date and January 1st, plus one.
isoweek returns the week as it would appear in the ISO 8601 system, which uses a reoccuring leap week.

Usage

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week(x)

week(x) <- value

isoweek(x)

Arguments

x

a date-time object. Must be a POSIXct, POSIXlt, Date, chron, yearmon, yearqtr, zoo, zooreg, timeDate, xts, its, ti, jul, timeSeries, or fts object.

value

a numeric object

Value

the weeks element of x as an integer number

References

http://en.wikipedia.org/wiki/ISO_week_date

See Also

isoyear

Examples

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x <- ymd("2012-03-26")
week(x)
week(x) <- 1
week(x) <- 54
week(x) > 3

Example output

Attaching package: 'lubridate'

The following object is masked from 'package:base':

    date

[1] 13
[1] FALSE

lubridate documentation built on May 30, 2017, 2:10 a.m.