span_around {padr}

Span an equally spaced vector around a datetime variable

Description

Span a vector of specified interval around a variable of class Date, POSIXct, or POSIXlt..

Usage

span_around(x, interval, start_shift = NULL, end_shift = start_shift)

Arguments

x

A vector of class Date, POSIXct, or POSIXlt.

interval

Character, specifying the desired interval.

start_shift

Character, indicating the time to shift back from the first observation.

end_shift

Character, indicating the time to shift forward from the last observation.

Details

Note that use of the start_shift and end_shift arguments change the entire spanning when they are not in line with the interval. It is not checked for.

Value

A datetime vector, with the first observation smaller or equal than min(x) and the last observation larger or equal than max(x). Spaces between points are equal to interval.

Examples

span_around(coffee$time_stamp, "hour")
span_around(coffee$time_stamp, "hour", end_shift = "2 hour")
span_around(coffee$time_stamp, "2 day")
span_around(coffee$time_stamp, "2 day", start_shift = "2 day")
span_around(emergency$time_stamp, "week")
span_around(emergency$time_stamp, "2 month")