(maybe) Add ability to compute mean/stddev of product.json

[stevengeeky]

You can currently download all product.json from datasets returned using bl dataset query. We could also add the ability to compute the mean/stddev of specified entries within the returned JSON data

[soichih]

This sounds like a good feature to have, but let's wait until we have at least 1 use-case for this feature so that we can work with that user to implement this.

[francopestilli]

I just talked to @stevengeeky it might be a fun thing for him to implement a CCA (Canonical Correlation Analysis) using the tract profiles on the HCP and the phenotypic data. See this paper: https://www.nature.com/articles/nn.4125 Supplemental information for technical details on CCA: https://media.nature.com/original/nature-assets/neuro/journal/v18/n11/extref/nn.4125-S1.pdf and a commentary: https://www.nature.com/articles/nn.4145 All done via DB/product.json