R/QWstacked.Rd.R

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

#' Stream Water Quality
#' 
#' Selected water-quality data for Judicial Ditch 64 near Mentor, Minnesota
#' (SW4), USGS station number 05078470 for calendar year 2003.
#' 
#' 
#' @name QWstacked
#' @docType data
#' @usage QWstacked
#' @format Data frame with 46 rows and 22 columns\cr
#' \tabular{lll}{ 
#' Name \tab Type \tab Description\cr\cr
#' agency_cd \tab character \tab Agency code\cr
#' site_no \tab character \tab USGS station number\cr
#' sample_dt \tab Date \tab Sample date\cr
#' sample_tm \tab character \tab Sample time\cr
#' sample_end_dt \tab Date \tab Sample end date\cr
#' sample_end_tm \tab character \tab Sample end time\cr
#' sample_start_time_datum_cd \tab character \tab Time zone datum\cr
#' tm_datum_rlbty_cd \tab character \tab Time datum reliability code\cr
#' coll_ent_cd \tab character \tab Collecting agency code\cr
#' medium_cd \tab character \tab Sample medium code\cr
#' tu_id \tab character \tab Taxonomic unit code\cr
#' body_part_id \tab character \tab Body part code\cr
#' parm_cd \tab character \tab Analyte parameter code\cr
#' remark_cd \tab character \tab Remark code for the result\cr
#' result_va \tab character \tab Numeric value of the result\cr
#' val_qual_tx \tab character \tab Result value qualifier code\cr
#' meth_cd \tab character \tab Lab method code\cr
#' dqi_cd \tab character \tab Data-quality indicator code\cr
#' rpt_lev_va \tab character \tab Reporting level\cr
#' rpt_lev_cd \tab character \tab Reporting level type\cr
#' lab_std_va \tab character \tab Lab standard deviation\cr
#' anl_ent_cd \tab character \tab Analyzing agency code\cr
#' } Note: all concentrations in the
#' column result_va are in milligrams per liter as phosphorus.\cr
#'
#' @source Data retrieved from NWISWeb
#' (\url{https://nwis.waterdata.usgs.gov/mn/nwis/qwdata}) on 2012-04-06. The
#' format of water-quality data is often retrieved by result--each row
#' represents the data for a single analyte. Note that many columns are part of
#' the generic data retrieval and do not pertain specifically to these data.
#' @keywords datasets
#' @examples
#' 
#' data(QWstacked)
#' # Plot the data for whole-water phosphorus
#' with(subset(QWstacked, parm_cd == "00665"), plot(sample_dt, result_va))
#' # Overlay the data for dissolved phosphorus (should be smaller values)
#' with(subset(QWstacked, parm_cd == "00666"), points(sample_dt, result_va, col='red'))
#' 
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