R/UraniumTDS.Rd.R

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

#' Groundwater Quality
#' 
#' Uranium and total dissolved solids in groundwaters of differing
#' bicarbonate concentrations.
#' 
#' 
#' @name UraniumTDS
#' @docType data
#' @usage UraniumTDS
#' @format Data frame with 44 rows and 3 columns\cr
#' \tabular{lll}{ 
#' Name \tab Type \tab Description\cr
#' TDS \tab numeric \tab Total dissolved solids concentration, in milligrams per liter\cr
#' Uranium \tab numeric \tab Uranium concentration, in parts per billion\cr
#' HCO3 \tab factor \tab Bicarbonate concentration relative to total anions\cr
#' }
#' @references 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 C16 in Helsel and Hirsch (2002).
#' @keywords datasets
#' @examples
#' 
#' data(UraniumTDS)
#' # The concentration of bicarbonate affects the relation between Uranium and TDS
#' # Bicarbonate concentration > 50% is plotted in red
#' with(UraniumTDS, plot(Uranium, TDS, col=HCO3, log='y'))
#' 
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