GillespieSSA2: Gillespie’s Stochastic Simulation Algorithm for impatient people.

GillespieSSA2 is a fast, scalable, and versatile framework for simulating large systems with Gillespie’s Stochastic Simulation Algorithm (SSA). This package is the spiritual successor to the GillespieSSA package originally written by Mario Pineda-Krch.

GillespieSSA2 has the following added benefits:

The SSA methods currently implemented are: Exact (ssa_exact()), Explicit tau-leaping (ssa_etl()), and the Binomial tau-leaping (ssa_btl()).


You can install:

If you encounter a bug, please file a minimal reproducible example on the issues page.


The following example models are available:

Latest changes

Check out news(package = "GillespieSSA2") or NEWS.md for a full list of changes.

Recent changes in GillespieSSA2 0.2.7 (14-07-2020)

Recent changes in GillespieSSA2 0.2.6 (14-03-2020)