flag_periods: Flag Affected Periods

In lsigut/openeddy: Post-process eddy covariance data with ease

Flag Affected Periods

Description

Identify and flag values obtained during periods when measurements were not reliable (e.g. instrument maintenance based on field notes).

Usage

flag_periods(x, start, end, name_out = "-")

Arguments

x	A POSIXt vector providing timestamp of measurements.
start, end	A POSIXt vector marking the start and end of the periods to be flagged. They must be of the same length.
name_out	A character string providing varnames attribute value of the output.

Details

Flagging is done according to the 0 - 2 quality control flag scheme.

Value

An integer vector with the same length as x. Its varnames and units attributes are set to name_out and "-" values, respectively.

Examples

# alternative style: as.POSIXct("2000-01-01 12:15:00", tz = "GMT")
timestamp <- seq(ISOdatetime(2000, 1, 1, 12, 15, 0, tz = "GMT"),
                 ISOdatetime(2000, 1, 1, 18, 15, 0, tz = "GMT"),
                 by = "30 mins")
periods <- data.frame(
start = c(ISOdatetime(2000, 1, 1, 13, 15, 0, tz = "GMT"),
          ISOdatetime(2000, 1, 1, 16, 15, 0, tz = "GMT")),
end = c(ISOdatetime(2000, 1, 1, 14, 15, 0, tz = "GMT"),
        ISOdatetime(2000, 1, 1, 17, 15, 0, tz = "GMT"))
)
(flags <- flag_periods(x, periods$start, periods$end, "qc_ALL_periods"))
data.frame(x, qc_ALL_periods = flags)

lsigut/openeddy documentation built on Jan. 15, 2025, 8:14 a.m.