propose alternative chunk shape algorithm

[bendichter]

Motivation

Fix #995

How to test the behavior?

Show how to reproduce the new behavior (can be a bug fix or a new feature)

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[oruebel]

In general, I think this is reasonable. @CodyCBakerPhD can you also take a look.

[bendichter]

Another approach could be to work with the prime factorization of the residual product of the size. That would get us closer to the desired chunk size but we could end up with very uneven shapes

[oruebel]

Another approach could be to work with the prime factorization of the residual product of the size. That would get us closer to the desired chunk size but we could end up with very uneven shapes

Uneven shape is not necessarily bad, but I think you probably want the ratio to be informed by the overall size of the dataset. I.e., for (time, electrodes) where time is much longer than electrodes, then you'd also want the chunks to be larger in the time dimension.