Looking for suggestions as to what statistical tests in R would you recommend. Generic process: I complete a model of coupled ODEs that I hypothesize to represent a particular system. I alter one or more parameters as a test of sensitivity. At some point behavior significantly diverges from the observed system. What statistical tests/models would you suggest I can use in R to determine the statistically significant point of divergence? Currently I compare points along the time axis but I suspect R offers a package with which to apply to the entirety of data from the two time series without selecting specific points in time.