first take on 'classification'

[behrica]

work in progress

Just have a look on the "direction" and give feedback of suitable for "noj"

[daslu]

@behrica Thanks for this fantastic tutorial. It is so helpful and clarifies a lot.

A few thoughts:

• '[tech.v3.dataset.column :as col] is in a comment, so the namespace cannot be loaded as-is.
• You do not need to require clay, and you do not need to start it either.
• Please feel comfortable pushing tutorials directly to main, or merging their PRs, or asking me to read before merging, or whatever you find the simplest.
• Let us add this chapter to the (work-in-progress) Noj documentation book? To do it, you can add it to the make! call at the dev notebook.
• Since we are now working on these docs together, let us discuss the structure and workflow. Please let me know if you think we should change anything. Also, probably every namespace should have the authors' names and the date of the last significant update or something like that.
• There is a Clay bug that makes printed values with < or > print in a strange way. This currently affects printed tensors, etc.
• In one of your comments, you mention tech.ml.dataset.classification. Probably you meant tech.v3.dataset.categorical, right?

[behrica]

I addressed most of your comments, I believe.