spatial distance curve metric redundancy

[tathey1]

we implement sd/ssd in both here: https://github.com/neurodata/brainlit/blob/develop/brainlit/algorithms/connect_fragments/trace_evaluation.py

and here: https://github.com/neurodata/brainlit/blob/develop/brainlit/utils/Neuron_trace.py

I think it should be a static (not a class) method, and it should only be defined once.

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[anviimishra]

I'm interested in helping with this!

[tathey1]

great, i think that maybe we should remove it from Neuron_trace, and make sure that we switch every time it is called to the version in trace_evaluation. What do you think @anviimishra?

[tathey1]

spatial distance is described in methods here

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