Fig. 6
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Left panel: plot showing the RMSE and correlation scores for 16 510 formulas. The red points show the formulas selected for analysis on the test set. These formulas achieve correlation and RMSE scores above the cutoffs mentioned at the top of the figure. Right panel: performance of the selected subset of formulas on the test set. Each plus symbol here represents one formula selected from the left panel (red points). The red vertical and horizontal lines point to the formula that obtained the lowest RMSE and highest correlation on the test set.
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