pub fn rk4<F>(
f: F,
t0: &ExactNum,
y0: &ExactNum,
t1: &ExactNum,
n_steps: usize,
p: usize,
rm: RoundingMode,
cc: &mut Consts,
) -> Option<(ExactNumArray, ExactNumArray)>Expand description
Classical RK4 for y' = f(t, y) on [t0, t1] with n_steps equal steps.
Returns row arrays (t, y) of length n_steps+1. None if n_steps is 0
or greater than ODE_MAX_STEPS, t1 ≤ t0, or a value is non-finite.