Update direction example is broken

[fabianp]

The example
https://github.com/openopt/copt/blob/master/examples/frank_wolfe/plot_vertex_overlap.py

(see output here )

does not produce the expected output.

@gideonite: do you want to take a look into it? This looks like a good issue to get familiar with the codebase

[gideonite]

Yes, interesting. I'll check it out! Sorry, somehow I missed that I was tagged in this issue! Feel free to assign to me.

[fabianp]

awesome, assigned

[GeoffNN]

Has this been fixed?

For away/pairwise, it would also be interesting to see the results. For pairwise, we may need to store the pair of vertices that are chosen.

[GeoffNN]

Shouldn't the overlap go back to 0 every time we change chosen vertex? Or are we plotting the cumulative sum right now?

[gideonite]

I tried to fix this in #34. I think it's the cumulative sum, see https://github.com/openopt/copt/blob/master/examples/frank_wolfe/plot_vertex_overlap.py#L56