predict best locations

Use resting state matrix to create synthetic data, parcellate by region (like Bassett paper), and predict values based on many random samples of n electrodes. Average predicted correlations in regions and across samples to generate a 'best electrode configuration' map.

Start by locating the resting-state matrix, synthetic-data generation, regional parcellation, and electrode-prediction entry points. Clarify the expected inputs, number of sampled electrodes, regional correlation aggregation, and output format; done means producing and validating a best-electrode-configuration map.

Written by the indexing model from the issue text.