nafta function

Evaluate parent kinetics using the NAFTA guidance

The function fits the SFO, IORE and DFOP models using mmkin

and returns an object of class nafta that has methods for printing and plotting.

Print nafta objects. The results for the three models are printed in the order of increasing model complexity, i.e. SFO, then IORE, and finally DFOP.

Source

NAFTA (2011) Guidance for evaluating and calculating degradation kinetics in environmental media. NAFTA Technical Working Group on Pesticides https://www.epa.gov/pesticide-science-and-assessing-pesticide-risks/guidance-evaluating-and-calculating-degradation

accessed 2019-02-22

US EPA (2015) Standard Operating Procedure for Using the NAFTA Guidance to Calculate Representative Half-life Values and Characterizing Pesticide Degradation https://www.epa.gov/pesticide-science-and-assessing-pesticide-risks/standard-operating-procedure-using-nafta-guidance

nafta(ds, title = NA, quiet = FALSE, ...)

## S3 method for class 'nafta'
print(x, quiet = TRUE, digits = 3, ...)

Arguments

• ds: A dataframe that must contain one variable called "time" with the time values specified by the time argument, one column called "name" with the grouping of the observed values, and finally one column of observed values called "value".
• title: Optional title of the dataset
• quiet: Should the evaluation text be shown?
• ...: Further arguments passed to mmkin (not for the printing method).
• x: An nafta object.
• digits: Number of digits to be used for printing parameters and dissipation times.

Returns

An list of class nafta. The list element named "mmkin" is the mmkin object containing the fits of the three models. The list element named "title" contains the title of the dataset used. The list element "data" contains the dataset used in the fits.

Examples

nafta_evaluation <- nafta(NAFTA_SOP_Appendix_D, cores = 1)
  print(nafta_evaluation)
  plot(nafta_evaluation)

Author(s)

Johannes Ranke