timeperiodsR (version 0.6.2)

last_n_weeks: Start and end of last n weeks

Description

Defines first and last date in previous period

Usage

last_n_weeks(x = Sys.Date(), 
             n = 1, 
			       part = getOption("timeperiodsR.parts"), 
			       week_start = 1, 
			       include_current = F)

Value

Object of tpr class

Arguments

x

Date object

n

Number of periods for offset

part

Part of period you need to receive, one of "all", "start", "end","sequence", "length". See details.

week_start

Start of week, default = 1 is Monday, 7 is Sunday

include_current

If TRUE incliding current period in sequence

Author

Alexey Seleznev

Details

You can get object of tpr class with all components or specify which component you need, use part for manage this option:

• all - get all components

• start - get only first date of period

• end - get only last date of period

• start - get vector of all dates in period

• length - get number of dates in period

See Also

For get next other periods see last_n_months(), last_n_days(), last_n_years(), last_n_quarters()

Examples

## To get start, end and sequence of last 2 weeks, 
## exclude current week
last2weeks <- last_n_weeks(n = 2)

## include current week
last2weeks_2 <- last_n_weeks(n = 2, include_current = TRUE)

## Get last 2 week with start on Sunday
lastWeek <- last_n_weeks(n = 2, week_start = 7)

## To get vector of date sequences 
last_n_weeks(n = 2, part = "sequence")
last_n_weeks(n = 2)$sequence
seq(last2weeks)

## Get number of days of last 2 weeks
day_nums <- last_n_weeks(n = 2, part = "length")
last_n_weeks()$length
length(last2weeks)