Kinetic Evaluation of Chemical Degradation Data R package mkin version 1.2.10 CRAN Task View: DifferentialEquations (https://CRAN.R-project.org/view=DifferentialEquations) 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. Non-constant errors can be taken into account using variance by variable or two-component error models <doi:10.3390/environments6120124>. Hierarchical degradation models can be fitted using nonlinear mixed-effects model packages as a back end <doi:10.3390/environments8080071>. Please note that no warranty is implied for correctness of results or fitness for a particular purpose. Software Depends: R (>= 4.1.0) Imports: stats, graphics, methods, parallel, deSolve (>= 1.35), R6, inline (>= 0.3.19), numDeriv, lmtest, pkgbuild, nlme (>= 3.1-151), saemix (>= 3.2), rlang, vctrs Suggests: knitr, rbenchmark, tikzDevice, testthat, rmarkdown, covr, vdiffr, benchmarkme, tibble, stats4, readxl Johannes Ranke <johannes.ranke@jrwb.de> Comprehensive R Archive Network (CRAN) Johannes Ranke [aut, cre, cph] (ORCID: <https://orcid.org/0000-0003-4371-6538>), Katrin Lindenberger [ctb] (contributed to mkinresplot()), René Lehmann [ctb] (ilr() and invilr()), Eurofins Regulatory AG [cph] (copyright for some of the contributions of JR 2012-2014) GPL 2025-05-13 application/tgz https://CRAN.R-project.org/package=mkin doi:10.32614/CRAN.package.mkin en-GB