Multispecies Coevolution Particle Swarm Optimization Based on Previous Search History

Figure 3

Box plots of results obtained by all algorithms. Here, 1 to 5 in the horizontal axis are indices of MCPSO-PSH, NrGA, CMA-ES, PSO, and DE, respectively (the box has lines at the lower quartile, median, and upper quartile values. The whiskers extend to the most extreme data points not considered outliers. Outliers (denoted by +) are data with values beyond 100 units of interquartile range).