R/MiningIron.Rd.R

In USGS-R/smwrData: Example hydrologic data to support statistical methods in water resources

#' Stream Water Quality
#' 
#' Iron concentrations at low flow for small eastern Ohio streams.
#' 
#' 
#' @name MiningIron
#' @docType data
#' @usage MiningIron
#' @format Data frame with 241 rows and 4 columns\cr
#' \tabular{lll}{ 
#' Name \tab Type \tab Description\cr\cr
#' Iron \tab numeric \tab Iron concentration\cr
#' Rock \tab factor \tab Rock type of the stream\cr
#' MineType \tab factor \tab Description of mining activity\cr
#' C5 \tab factor \tab Used to construct table C5\cr
#' }
#' @references Helsel, D.R., 1983, Mine drainage and rock type influences on
#' eastern Ohio stream water quality: Water Resources Bulletin, v. 19, no. 6,
#' p. 881--887.\cr
#' \cr
#' Helsel, D.R., and Hirsch, R.M., 2002, Statistical
#' methods in water resources: U.S. Geological Survey Techniques of
#' Water-Resources Investigations, book 4, chap. A3, 522 p.
#' @source Appendix C6 in Helsel and Hirsch (2002).\cr
#' Note: A different set of
#' randomly selected values are used to reconstruct table C5 than what was
#' selected in Helsel and Hirsch (2002).
#' @keywords datasets
#' @examples
#' 
#' data(MiningIron)
#' # Create simple boxplots by rock type and by mining activity
#' par(mfrow=c(2,1), las=1)
#' with(MiningIron, boxplot(split(Iron, Rock), range=0, log='y'))
#' with(MiningIron, boxplot(split(Iron, MineType), range=0, log='y'))
#' 
NULL