Multilayer analysis of population diversity in grammatical evolution for symbolic regression
DOI: 10.1007/s00500-020-05062-9 In this paper, we analyze the population diversity of grammatical evolution (GE) on multiple levels of genetic information: chromosome diversity, expression diversity, and output diversity. Thereby, we use a tree-similarity metric from tree-based GP literature to determine similarity of expression trees generated in GE. The similarity of outputs is determined via their correlation.…