Fig. 8.

Statistical performance of the evolutionary algorithm for the prostate B case. The algorithm has been run 25 times and the median objective value of the population of 20 individuals recorded for each run. The boxes represent the median and the 25th and 75th percentiles of the 25 median objective function values at each generation. The error bars represent the range of these 25 median objective values. The green dotted line shows the objective value for the preset short path and the blue dashed line shows the objective value for the body path. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)