daily: Calculate daily mean, min or max

In eva3dm: Evaluation of 3D Meteorological and Air Quality Models

Calculate daily mean, min or max

Description

function to calculate daily mean, min or max of a data.frame

Usage

daily(
  data,
  time = "date",
  var,
  stat = mean,
  min_offset = 0,
  hour_offset = 0,
  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 0)
hour_offset	hours of observation from previous day (default is 0)
numerical	TRUE (default) include only numerical columns
verbose	display additional information

Value

data.frame with time and the daily mean, min or max

Examples

# in case there is connection issue
load_data <- function(cond) {
  message(paste("conection issue, loading pre-downloaded data"))
  DATA <- readRDS(paste0(system.file("extdata",package="eva3dm"),
                         "/riem_OAKB_jan_2012.Rds"))
  return(DATA)
}

sites <- c("OAKB")
for(site in sites){
  cat('Trying to download METAR from:',site,'...\n')
  DATA <- tryCatch(riem::riem_measures(station    = sites,
                                       date_start = "2012-01-01",
                                       date_end   = "2012-02-01"),
                   error = load_data)
}
data_daily_mean <- daily(DATA,time = 'valid')
data_daily_min  <- daily(DATA[1:7],time = 'valid',stat = min)
data_daily_max  <- daily(DATA[1:7],time = 'valid',stat = max)

eva3dm documentation built on June 8, 2025, 10:44 a.m.