Import NWIS Sample Data for EGRET analysis

Imports data from NWIS web service. For raw data, use readWQPqw from the dataRetrieval package. This function will retrieve the raw data, and compress it (summing constituents) if more than 1 parameter code is supplied. See section 3.2.4 of the vignette for more details.

Usage

readNWISSample(siteNumber, parameterCd, startDate = "", endDate = "",
  verbose = TRUE)

Arguments

siteNumber

character USGS site number. This is usually an 8 digit number

parameterCd

character USGS parameter code. This is usually an 5 digit number.

startDate

character starting date for data retrieval in the form YYYY-MM-DD. Default is empty quotes "" which will retrieve the full period of record.

endDate

character ending date for data retrieval in the form YYYY-MM-DD. Default is empty quotes "" which will retrieve the full period of record.

verbose

logical specifying whether or not to display progress message

Value

A data frame 'Sample' with the following columns:

Name	Type	Description
Date	Date	Date
ConcLow	numeric	Lower limit of concentration
ConcHigh	numeric	Upper limit of concentration
Uncen	integer	Uncensored data (1=TRUE, 0=FALSE)
ConcAve	numeric	Average concentration
Julian	integer	Number of days since Jan. 1, 1850
Month	integer	Month of the year [1-12]
Day	integer	Day of the year [1-366]
DecYear	numeric	Decimal year
MonthSeq	integer	Number of months since January 1, 1850
SinDY	numeric	Sine of the DecYear
CosDY	numeric	Cosine of the DecYear

See also

compressData, populateSampleColumns, readWQPqw

Examples

# \donttest{
# These examples require an internet connection to run

Sample_01075 <- readNWISSample('01594440','01075', '1985-01-01', '1985-03-31')
# }