TADA_FlagMethod: Check for Suspect Analytical Methods

In USEPA/TADA: EPA TADA (Tools for Automated Data Analysis) R Package

Check for Suspect Analytical Methods

Description

Function checks the validity of each characteristic-analytical method combination in the dataframe. When clean = TRUE, rows with Suspect characteristic-analytical method combinations are removed. Default is clean = FALSE. When flaggedonly = TRUE, dataframe is filtered to show only Suspect characteristic-analytical method combinations. Default is flaggedonly = FALSE.

Usage

TADA_FlagMethod(.data, clean = FALSE, flaggedonly = FALSE)

Arguments

.data	TADA dataframe
clean	Boolean argument; removes "Suspect" characteristic-analytical method combinations from the dataframe when clean = TRUE. Default is clean = FALSE.
flaggedonly	Boolean argument; filters dataframe to show only "Suspect" characteristic-analytical method combinations when flaggedonly = TRUE. Default is flaggedonly = FALSE.

Details

The “Not Reviewed” value within "TADA.AnalyticalMethod.Flag" means that the EPA WQX team has not yet reviewed the combinations (see https://cdx.epa.gov/wqx/download/DomainValues/QAQCCharacteristicValidation.CSV). The WQX team plans to review and update these new combinations quarterly.

Value

This function adds the TADA.AnalyticalMethod.Flag to a TADA dataframe. This column flags Suspect CharacteristicName, ResultAnalyticalMethod/MethodIdentifier, and ResultAnalyticalMethod/MethodIdentifierContext combinations in your dataframe as either "Not Reviewed", "Suspect", or "Pass". When clean = FALSE and flaggedonly = TRUE, the dataframe is filtered to show only "Suspect" characteristic-analytical method combinations; the column TADA.AnalyticalMethod.Flag is still appended. When clean = TRUE and flaggedonly = FALSE, "Suspect" rows are removed from the dataframe and no column will be appended.

Examples

# Load example dataset
data(Data_NCTCShepherdstown_HUC12)

# Remove Suspect characteristic-analytical method combinations from
# dataframe:
SuspectMethod_clean <- TADA_FlagMethod(Data_NCTCShepherdstown_HUC12,
  clean = TRUE
)

# Flag, but do not remove, Suspect characteristic-analytical method
# combinations
# in new column titled "TADA.AnalyticalMethod.Flag":
SuspectMethod_flags <- TADA_FlagMethod(Data_NCTCShepherdstown_HUC12,
  clean = FALSE
)

# Show only Suspect characteristic-analytical method combinations:
SuspectMethod_flaggedonly <- TADA_FlagMethod(Data_NCTCShepherdstown_HUC12,
  clean = FALSE, flaggedonly = TRUE
)

USEPA/TADA documentation built on April 12, 2025, 1:47 p.m.