nafta

print.nafta

The function fits the SFO, IORE and DFOP models using <code>mmkin</code>
and returns an object of class <code>nafta</code> 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.

Calculation routines based on the FOCUS Kinetics Report (2006,
2014). Includes a function for conveniently defining differential equation
models, model solution based on eigenvalues if possible or using numerical
solvers. If a C compiler (on windows: 'Rtools') is installed, differential
equation models are solved using automatically generated C functions.
Heteroscedasticity can be taken into account using variance by variable or
two-component error models as described by Ranke and Meinecke (2018)
<doi:10.3390/environments6120124>. Hierarchical degradation models can
be fitted using nonlinear mixed-effects model packages as a back end as
described by Ranke et al. (2021) <doi:10.3390/environments8080071>. Please
note that no warranty is implied for correctness of results or fitness for a
particular purpose.

Johannes Ranke

mkin

Kinetic Evaluation of Chemical Degradation Data

Katrin Lindenberger

René Lehmann

Eurofins Regulatory AG 

nafta function

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

Arguments

Author

Evaluate parent kinetics using the NAFTA guidance — nafta

<dl>

<dt>ds</dt>
<dd>A dataframe that must contain one variable called "time" with the
time values specified by the <code>time</code> argument, one column called
"name" with the grouping of the observed values, and finally one column of
observed values called "value".</dd>


<dt>title</dt>
<dd>Optional title of the dataset</dd>


<dt>quiet</dt>
<dd>Should the evaluation text be shown?</dd>


<dt>...</dt>
<dd>Further arguments passed to <code>mmkin</code> (not for the
printing method).</dd>


<dt>x</dt>
<dd>An <code>nafta</code> object.</dd>


<dt>digits</dt>
<dd>Number of digits to be used for printing parameters and
dissipation times.</dd>

</dl>

nafta: Evaluate parent kinetics using the NAFTA guidance

Description

Usage

Value

Arguments

Author

Examples