Visualize optimization process with an state size larger than 3

[weisongwen]

@lilipads Thanks for sharing the interesting work. I am a researcher from the Robotics field with a special focus on state estimation. Do you have any idea that how can we visualize the shape of the optimization when the size of the state to be optimized is more than 3 dimensions?

Thanks a lot in advance,

Best, Weisong,