R/TNLoads.Rd.R

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

#' Stream Water Quality
#' 
#' Total nitrogen loads and basin characteristics for urban runoff.
#' 
#' 
#' @name TNLoads
#' @docType data
#' @usage TNLoads
#' @format Data frame with 42 rows and 9 columns\cr
#' \tabular{lll}{ 
#' Name \tab Type \tab Description\cr
#' LOGTN \tab numeric \tab Log10 of (total nitrogen load, in pounds)\cr
#' LOGDA \tab numeric \tab Log10 of (drainage area, in square miles)\cr
#' LOGIMP \tab numeric \tab Log10 of (percentage impervious surface area [unitless])\cr
#' MJTEMP \tab numeric \tab Mean minimum January temperature, in degrees Fahrenheit\cr
#' MSRAIN \tab numeric \tab Mean seasonal rainfall, in inches\cr
#' PRES \tab integer \tab Percentage of basin that is residential [unitless]\cr
#' PNON \tab integer \tab Percentage of basin that is non-urban [unitless]\cr
#' PCOMM \tab integer \tab Percentage of basin that is commercial [unitless]\cr
#' PIND \tab integer \tab Percentage of basin that is industrial [unitless]\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.\cr
#' \cr
#' Mustard, D.C., Driver, N.E.,
#' Chyr, J., and Hansen, B.G., 1987, U.S. Geological Survey urban stormwater
#' data base of constituent storm loads: U.S. Geological Survey Water-Resources
#' Investigations Report 87-4036, 328 p.
#' @source Appendix C15 in Helsel and Hirsch (2002), from Mustard and others
#' (1987).
#' @keywords datasets
#' @examples
#' 
#' data(TNLoads)
#' # Create a scatter plot matrix of the first 5 columns
#' # Shows the correlation amongst those variables.
#' # The remaining variables are even more discretized than MSRAIN
#' pairs(TNLoads[,1:5])
#' 
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