atrazine.df: Atrazine Data A dataset of atrazine samples, replicates, and...

In USGS-R/smwrQW: Tools for censored data analysis

Atrazine Data A dataset of atrazine samples, replicates, and blanks collected by the U.S. Geological Survey from October 1, 2001 through September 30, 2012.

Description

Atrazine Data A dataset of atrazine samples, replicates, and blanks collected by the U.S. Geological Survey from October 1, 2001 through September 30, 2012.

Usage

atrazine.df

Format

Data frame with 13106 rows and 12 columns

Name	Type	Description
staid	character	USGS station number
Date	Date	Sample date
MEDIUM_CD	character	Sample medium code, see Details
SAMP_TYPE_CD	integer	Sample type code, see Details
sched	character	Lab schedule
RESULT_VA	numeric	Numeric value of the concentration
REMARK_CD	character	Remark code for the value
RPT_LEV_VA	numeric	Reporting level
RPT_LEV_CD	character	Reporting level code
Units	character	Units of the concentration
QW_METHOD_CD	character	Lab method code
PARAMETER_CD	character	Parameter code

Details

The sample medium codes are regular water-quality sample, WS; replicate water-quality sample, WSQ; and field blank, OAQ. The sample type codes are regular sample with no QAQC sample, 9; regular sample with QAQC or the replicate sample, 7; and field blank , 2.

Source

Data retreived from the national water information system and processed by Jeffery Martin and Laura Medalie of the U.S. Geological Survey.

Examples

data(atrazine.df)
# How many different kinds of samples?
with(atrazine.df, table(MEDIUM_CD))
# Now many stations?
with(atrazine.df, table(staid))

USGS-R/smwrQW documentation built on Oct. 11, 2022, 6:13 a.m.