have a model written in MATLAB that needs to be written into R

Technically it models Carbon-Mercury 4-box ocean-atmosphere model
As used in Dal Corso et al. 2020 Nat. Comm. (academic paper)

Contents:
CARMER_frontend.m // Model frontend file // run this code to solve model and plot results // sets parameters and starting values, runs solver

CARMER_equations.m // Model equations file // do not run this code directly // contains flux and reservoir calculations

Commented out lines cover the three scenarios tested in the paper.

Notes:
Requires MATLAB to test, of course.

Deliverables
Simulates correct numerical solutions into output files.