Comparison of different models on hold-out data.

<p>Coherence score was calculated as exponential of the mean log-likelihood of each chromatin code in the hold-out test data, and was normalized by the best model coherence score (hence the 3^rd order interaction model with regularization and fine tuning has normalized coherence score of 1). Numbers of non-zero parameters for self-energy, pairwise interaction and third-order interactions are shown in parenthesis, in that order.