#' Monthly Relative Humidity Data
#'
#' @description
#' Monthly meteorological data including relative humidity (rh),
#' temperature, insolation, precipitation, and wind speed for the
#' meteorological station of Brasília, Brazil (2000-2025), obtained from
#' the National Institute of Meteorology (INMET).
#'
#' The dataset contains two missing observations in the variables \code{ins}
#' and \code{pre}, corresponding to September 2020 and November 2025. To address
#' these missing values, imputation was performed via seasonal interpolation using
#' the \pkg{imputeTS} package, with the imputed versions stored as \code{ins2}
#' and \code{pre2}.
#'
#' @docType data
#' @usage data(RelativeHumidity)
#'
#' @format A data frame with 312 observations and 11 variables:
#' \describe{
#'   \item{date}{Date. Last day of the reference month for the monthly
#'         measurements (YYYY-MM-DD).}
#'   \item{rh}{Numeric. Monthly mean relative humidity, originally measured
#'         in percent and rescaled to the unit interval (0, 1).}
#'   \item{ins}{Numeric. Monthly total insolation (in hours), contains
#'         2 missing values.}
#'   \item{ins2}{Numeric. Monthly total insolation (in hours) with missing
#'         values imputed via seasonal interpolation.}
#'   \item{pre}{Numeric. Monthly total precipitation (in mm), contains
#'         2 missing values.}
#'   \item{pre2}{Numeric. Monthly total precipitation (in mm) with missing
#'         values imputed via seasonal interpolation.}
#'   \item{cld}{Numeric. Monthly mean cloudiness (in tenths).}
#'   \item{ap}{Numeric. Monthly mean atmospheric pressure (in hPa).}
#'   \item{tmax}{Numeric. Monthly mean of daily maximum temperature
#'         (in degrees Celsius).}
#'   \item{ws}{Numeric. Monthly mean wind speed (in m/s).}
#'   \item{wd}{Numeric. Monthly predominant wind direction, coded by
#'         INMET/BDMEP in tens of degrees (e.g., 9 = 90 degrees, East;
#'         32 = 320 degrees, Northwest). A value of 0 indicates calm
#'         conditions (no wind or undefined direction). Multiply by 10
#'         to obtain the direction in degrees (0-360).}
#' }
#'
#' @source
#' Instituto Nacional de Meteorologia (INMET). Banco de Dados
#' Meteorológicos para Ensino e Pesquisa (BDMEP), Estação de Brasília
#' (https://bdmep.inmet.gov.br). Data accessed in 2026.
#'
#' @keywords datasets
#'
#' @examples
#' # Load the dataset
#' data(RelativeHumidity)
#'
#' # View first rows
#' head(RelativeHumidity)
#'
#' # Check structure
#' str(RelativeHumidity)
#'
#' # Insolation with and without imputation
#' plot(RelativeHumidity$ins, type = "l", col = "red",
#'      ylab = "Insolation", main = "Missing values visible as gaps")
#' points(RelativeHumidity$ins2, type = "l", col = "blue")
"RelativeHumidity"
