Simulating Differential Equations with Data R package demodelr version 2.0.1 CRAN Task View: DifferentialEquations (https://CRAN.R-project.org/view=DifferentialEquations) Designed to support the visualization, numerical computation, qualitative analysis, model-data fusion, and stochastic simulation for autonomous systems of differential equations. Euler and Runge-Kutta methods are implemented, along with tools to visualize the two-dimensional phaseplane. Likelihood surfaces and a simple Markov Chain Monte Carlo parameter estimator can be used for model-data fusion of differential equations and empirical models. The Euler-Maruyama method is provided for simulation of stochastic differential equations. The package was originally written for internal use to support teaching by Zobitz, and refined to support the text "Exploring modeling with data and differential equations using R" by John Zobitz (2021) <https://jmzobitz.github.io/ModelingWithR/index.html>. Software Depends: R (>= 4.1.0) Imports: ggplot2, purrr, tidyr, dplyr, formula.tools, GGally, rlang, utils, tibble, tidyselect Suggests: knitr, rmarkdown John Zobitz <zobitz@augsburg.edu> Comprehensive R Archive Network (CRAN) John Zobitz [aut, cre] (ORCID: <https://orcid.org/0000-0002-1830-143X>) MIT + file LICENSE (https://CRAN.R-project.org/package=demodelr/LICENSE) 2026-01-16 application/tgz https://CRAN.R-project.org/package=demodelr doi:10.32614/CRAN.package.demodelr