Fig. 4

The frequency distributions of all possible pairwise distances in the space of rooted 1-labeled trees with seven nodes. A The distributions for the BD, 1-BD and 2-BD metrics.B The distributions for the AD, CASet and DISC measures. Here, all the pairwise distances were binned into 40 equal intervals \(\left( \frac{i}{40}, \frac{i+1}{40}\right]\), \(0\le i\le 39\). C The distribution for the TD measure. D The distribution for the MLTED measure. BD Bourque distance, AD ancestor distance, CASet common ancestor set distance, DISC distinctly inherited set, TD triplet-based distance, MLTED multi-label tree edit distance