Docs reorganisation

[neelasha23]

Reorganisation of the classification module.

Issue ticket number and link

Closes #283

Checklist before requesting a review

• [x] I have performed a self-review of my code
• [x] I have added thorough tests (when necessary).
• [x] I have added the right documentation in the docstring and changelog (when needed)

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:books: Documentation preview :books:: https://sklearn-evaluation--297.org.readthedocs.build/en/297/

[coveralls]

Pull Request Test Coverage Report for Build 4290054029

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 90.93%

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Totals
Change from base Build 4287965346:	0.0%
Covered Lines:	3118
Relevant Lines:	3429

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💛 - Coveralls

[neelasha23]

Couple of queries:

1. The optimization section : There are four plots here : Confusion matrix, ROC, feature importances and Grid search results. If we want to shorten this tutorial we can just retain Grid search results plot and remove Confusion matrix, ROC, feature importances and add reference to some other doc for these plots. Currently there isn't an API Reference for RandomForestClassifierGrid so should it be added ?
2. Since Grid search is now moved to the classification section, the model optimization section now contains Feature Ranking only. Does this need to be here or moved to some other section?

@edublancas

[edublancas]

The optimization section : There are four plots here : Confusion matrix, ROC, feature importances and Grid search results. If we want to shorten this tutorial we can just retain Grid search results plot and remove Confusion matrix, ROC, feature importances and add reference to some other doc for these plots. Currently there isn't an API Reference for RandomForestClassifierGrid so should it be added ?

I agree, let's just keep the grid search results plot. mention that there are other plots available and link to the API docs (we need to create the API docs) so let's create a new sklearn_evaluation.grid section in the docs and put it there. Let's also add some embedded examples in the docstring.

Since Grid search is now moved to the classification section, the model optimization section now contains Feature Ranking only. Does this need to be here or moved to some other section?

Looks like this methods are generic, right? they could be used in classification or regression. If so, I think it's fine to leave them there, we can decide later

[neelasha23]

Made the changes @edublancas

[neelasha23]

Made the above changes.

I think you mentioned something about some error in this plot, right?

This was fixed. I think the plots are showing up only when we are calling the from_raw_data method and assigning to a variable. Not sure why this is happening.

@edublancas