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Aggregate a (sub-)hourly met frame to daily

Source: R/apply_met_bias_correction.R
met_to_daily.Rd

Rain/snow are summed, everything else averaged; Date is returned as class Date, which is what lake-model builders such as AEME::build_aeme() expect.

Usage

met_to_daily(met, tz = NULL, min_frac = 0.5)

Arguments

met

data frame with Date (POSIXct) + MET_* columns.

tz

time zone used to assign calendar days (default: the tz attribute of met, else "UTC").

min_frac

drop days with less than this fraction of expected hourly records (default 0.5); set 0 to keep all.

Value

daily data frame, Date first.

Examples

h <- data.frame(Date = seq(as.POSIXct("2024-01-01", tz = "UTC"),
                           by = "hour", length.out = 48),
                MET_tmpair = rnorm(48, 15), MET_pprain = 0.1)
met_to_daily(h)
#>         Date MET_tmpair MET_pprain
#> 1 2024-01-01   14.91357        2.4
#> 2 2024-01-02   15.14154        2.4