The evaluation metric HV is missing from DF10-DF14

[xdzzfsw]

Hello, thank you so much for your great work. When I ran the code, I found that only the metrics for two objectives (DF1-DF9) were correct. However, three objectives (DF10-DF14) are missing the evaluation index of HV. What is the reason for this?

[dynoptimization]

Thank you for using this library. The primary reason is that in the pymoo/util/display/multi.py file of the pymoo library, the developers set it to display the HV (Hypervolume) index only when the number of objective functions is 2.

[dynoptimization]

Consequently, for problems like DF10-DF14 which have three objectives, the HV index is not shown in the output.

            if problem.n_obj == 2:
                self.columns += [self.hv]

[xdzzfsw]

Ok, thank you very much for your reply.