Averaged SHAP values per three Carrington rotations over time for solar wind parameter and coronal hole wind type. From top to bottom: Zhao et al. (2009) coronal hole, Xu & Borovsky (2015) coronal hole, 7-means CH1, and 7-means CH2. Green shading highlights 2009. The SHAP values for seven considered solar wind parameters are distributed in the left and right columns. The left column shows n_p, T_p, B, and $log{n}_{{\text{O}}^{7+}}/n_{{\text{O}}^{6+}}$. The right column shows v_p, a_{col, p − p}, and ${\stackrel{\sim }{q}}_{\text{Fe}}$. For each solar wind parameter, two lines with the same color show for each solar wind parameter the importance of low parameter values (the median SHAP value of all observations below the median of all observations from 2001–2010, i.e., percentiles 0–49.99; dashed lines) and high parameter values (the median SHAP value of all observations above the median of all observations from 2001–2010, i.e., percentiles 50.01–100; solid lines). Only positive SHAP values are shown to focus on the importance of each parameter for an identification of the coronal hole wind.