EGRET (version 2.3.0)

readNWISSample: Import NWIS Sample Data for EGRET analysis

Description

Imports data from NWIS web service. This function gets the data from here: http://nwis.waterdata.usgs.gov/nwis/qwdata/ A list of parameter and statistic codes can be found here: http://help.waterdata.usgs.gov/codes-and-parameters For raw data, use readNWISqw from the dataRetrieval package. This function will retrieve the raw data, and compress it (summing constituents). See section 3.2.4 of the vignette for more details.

Usage

readNWISSample(siteNumber, parameterCd, startDate = "", endDate = "",
  interactive = 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.

endDate

character ending date for data retrieval in the form YYYY-MM-DD.

interactive

logical Option for interactive mode. If true, there is user interaction for error handling and data checks.

Value

• A data frame 'Sample' with the following columns: lll{ 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, readNWISqw

Examples

# These examples require an internet connection to run

Sample_01075 <- readNWISSample('01594440','01075', '1985-01-01', '1985-03-31')
Sample_All2 <- readNWISSample('05114000',c('00915','00931'), '1985-01-01', '1985-03-31')
Sample_Select <- readNWISSample('05114000',c('00915','00931'), '', '')