The dataset contains discretely sampled observations for a simulated stochastic differential equation (SDE) with dynamics:dX_t = (1.5X_t-0.4X_tY_t)dt+sqrt(0.05X_t)dW_t
dY_t = (-1.5Y_t+0.4X_tY_t-0.2Y_t^2)dt+sqrt(0.1X_t)dB_t
where dW_t and dB_t are standard Brownian motions, t is time and X_0 = 5, Y_0 = 5.