Added KNN classifier

[RohanHBTU]

Linked Issue

Closes: #issue number that will be closed through this PR issue #5 Add a KNN classifier

Describe the changes you've made

Give a clear description what modifications you have made

I have added a KNN classifier. Additionally, accuracy, confusion matrix and f1 score has also been printed. Hyperparameter tuning has also been done.

Type of change

What sort of change have you made:

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Code style update (formatting, local variables)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

How Has This Been Tested?

Describe how have you verified the changes made

I have calculated the best score and best parameters and also has shown f1 score, accuracy and confusion matrix.

Checklist:

• [x] My code follows the guidelines of this project.
• [x] I have performed a self-review of my own code.
• [x] I have commented my code, particularly wherever it was hard to understand.
• [ ] I have made corresponding changes to the documentation.
• [x] My changes generate no new warnings.
• [x] I have added tests that prove my fix is effective or that my feature works.
• [x] Any dependent changes have been merged and published in downstream modules.

Screenshots

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[KrishnenduDakshi2002]

is it possible to lower the fn counts? If you can, pls try that.

[RohanHBTU]

is it possible to lower the fn counts? If you can, pls try that.

Ok...I will work on that

[RohanHBTU]

despite many efforts and tuning ... KNN classifier is not improving the fn count. So, please accept and merge this as final work

[KrishnenduDakshi2002]

despite many efforts and tuning ... KNN classifier is not improving the fn count. So, please accept and merge this as final work

okay.