Comparison of distributions of parameters for the observed exoplanets and left, middle, and right panels are M_p − e, a − e, and a −M_p distributions, respectively. The top panels show observed data from the RV-detected planets. The bottom panels show all the simulated planets at the end of the simulations (100 Myr), while the middle panels show observable planets with the RV detection limit of 1 m s⁻¹ and a ≤ 10 au. The black dashed line shown on a − M_p panels corresponds to 1 m s⁻¹ limit. The shaded areas in a − e and a −M_p distributionsindicate that the inner disc edge of our model is at 0.1 au, and thus we do not intend to reproduce planet distributions there. Circles and crosses represent giant (≳ 0.1 M_J) and low-mass (<0.1 M_J) planets, respectively, and the red, orange, green, blue, and purple colours correspond to stellar metallicities of − 0.5, −0.3, 0.0, 0.3, and 0.5, respectively. Some planets are clustered around 0.1 au because the disc’s inner edge is set there.