Assigns a sleep-aligned date (sleep_date) based on a specified daily
offset time. This is used to shift the day boundary (e.g noon-to-noon) so
that overnight sleep periods are grouped within a single "sleep day" rather
than split across calendar days.
Usage
make_offset(sleep_dataframe, offset = "12:00")
Arguments
- sleep_dataframe
tbl. Data frame with POSIXct timestamp column dtt.
- offset
character. Time of day (HH:MM) used as the cutoff for defining
the sleep day. Timestamps occuring after this time are assigned to the next
day.
Value
tbl. The input data frame with the sleep_date column.