Figure : Mean learning curves for the performance of vectorized KRR models for the prediction of 𝐸 (𝑆 1 ) and 𝐸 (𝑇 1 ). The mean curve depicts the mean performance across five different learning curves, available in section S2.3 of the ESI. The "lowest" and "highest" encountered values are taken from across all curves at each learning curve percentage, independently.