function to calculate Ozone Maximum Daily 8-hr Average or 8-hr moving Average for a data.frame
Usage
hourly(
data,
time = "date",
var,
stat = mean,
min_offset = 30,
numerical = TRUE,
verbose = TRUE
)Arguments
- data
data.frame with time column and variable columns to be processed
- time
name of the time column (default is date) in POSIXct
- var
name of the columns to be calculated
- stat
function of the statistics to calculate (default is mean)
- min_offset
minutes of observation from previous hour (default is 30)
- numerical
TRUE (default) includes only numerical columns
- verbose
display additional information
Value
data.frame including only numerical columns
data.frame with time and the hourly mean, min or max
Examples
sites <- c("OAHR")
for(site in sites){
cat('downloading METAR from:',site,'...\n')
DATA <- riem::riem_measures(station = sites,
date_start = "2012-01-01",
date_end = "2012-02-01")
}
#> downloading METAR from: OAHR ...
data_hourly_mean <- hourly(DATA,time = 'valid')
#> processing hourly data ...
data_hourly_min <- hourly(DATA[1:7],time = 'valid',stat = min)
#> processing hourly data ...
data_hourly_max <- hourly(DATA[1:7],time = 'valid',stat = max)
#> processing hourly data ...