DOC effect and comparison to deal with imbalanced classification

[glemaitre]

This will show the effects of dealing with imbalanced classes.
In addition, we will show the different strategy which comes out-of-the-box in scikit-learn and the couple of methods which could be used successively from imbalanced-learn

[pep8speaks]

Hello @glemaitre! Thanks for updating this PR. We checked the lines you've touched for PEP 8 issues, and found:

• In the file examples/applications/plot_impact_imbalanced_classes.py:

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Comment last updated at 2019-11-19 22:36:37 UTC

[lgtm-com]

This pull request introduces 3 alerts when merging 96ef7d4 into 158258e - view on LGTM.com

new alerts:

• 1 for Wrong name for an argument in a call
• 1 for Mismatch in multiple assignment
• 1 for Unused import

[codecov]

Codecov Report

Merging #648 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #648   +/-   ##
=======================================
  Coverage   98.46%   98.46%           
=======================================
  Files          82       82           
  Lines        4873     4873           
=======================================
  Hits         4798     4798           
  Misses         75       75

---

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[lgtm-com]

This pull request introduces 3 alerts when merging 2940dbb into f356284 - view on LGTM.com

new alerts:

• 2 for Unused import
• 1 for Wrong name for an argument in a call

[lgtm-com]

This pull request introduces 2 alerts and fixes 3 when merging 4d0a629 into f356284 - view on LGTM.com

new alerts:

• 2 for Unused import

fixed alerts:

• 2 for Mismatch in multiple assignment
• 1 for Wrong name for an argument in a call

[lgtm-com]

This pull request introduces 2 alerts when merging db914bf into f356284 - view on LGTM.com

new alerts:

• 1 for Wrong name for an argument in a call
• 1 for Unused import

[lgtm-com]

This pull request introduces 2 alerts when merging 802cc44 into f356284 - view on LGTM.com

new alerts:

• 1 for Wrong name for an argument in a call
• 1 for Unused import

[lgtm-com]

This pull request introduces 2 alerts when merging 8b11705 into f356284 - view on LGTM.com

new alerts:

• 1 for Wrong name for an argument in a call
• 1 for Unused import