Ode

Simple trick to speed up ODE integration in R

Introduction I recently was doing model fitting on a ton of simulations, and needed to figure out a way to speed things up. My first instinct was to get out of the R environment and write CSnippets for the pomp package (more on this in a later blog), or to use RCpp, but I used the profvis package to help diagnose the speed issues, and found a really simple change that can save a ton of time depending on your model.