Solve the initial value problem y' = func(t, y, parms), y(times[0]) = y, with one fixed step per interval of
times. Equivalent to deSolve::ode(y, times, func, parms, method) in R. That is for "euler" and "rk4"; for
"rk2", it is deSolve::ode(..., method = rkMethod("rk2")) (or deSolve::rk(..., method = "rk2")), since deSolve's ode()
does not accept method = "rk2".
Solve the initial value problem y' = func(t, y, parms), y(times[0]) = y, with one fixed step per interval of
times. Equivalent todeSolve::ode(y, times, func, parms, method)in R. That is for"euler"and"rk4"; for"rk2", it isdeSolve::ode(..., method = rkMethod("rk2"))(ordeSolve::rk(..., method = "rk2")), since deSolve'sode()does not acceptmethod = "rk2".