Datetime filtering for pat time series objects

Source: R/pat_filterDatetime.R

Subsets a pat object by datetime. This function allows for sub-day filtering as opposed to pat_filterDate() which always filters to day-boundaries.

Datetimes can be anything that is understood by MazamaCoreUtils::parseDatetime(). For non-POSIXct values, the recommended format is "YYYY-mm-dd HH:MM:SS".

Timezone determination precedence assumes that if you are passing in POSIXct values then you know what you are doing.

  1. get timezone from startdate if it is POSIXct

  2. use passed in timezone

  3. get timezone from pat

pat_filterDatetime(
  pat = NULL,
  startdate = NULL,
  enddate = NULL,
  timezone = NULL,
  unit = "sec",
  ceilingStart = FALSE,
  ceilingEnd = FALSE
)

Arguments

pat

pat object.

startdate

Desired start datetime (ISO 8601).

enddate

Desired end datetime (ISO 8601).

timezone

Olson timezone used to interpret dates.

unit

Units used to determine time at end-of-day.

ceilingStart

Logical instruction to apply ceiling_date to the startdate rather than floor_date

ceilingEnd

Logical instruction to apply ceiling_date to the enddate rather than floor_date

Value

A subset of the incoming pat time series object. (A list with meta and data dataframes.)