Added a function to visualize confusion matrix

[RohanHBTU]

Linked Issue

Closes: issue #8 Added a function visualize confusion matrix

Describe the changes you've made

Give a clear description what modifications you have made

I have added a function to visualize confusion matrix in a heatmap form with coolwarm colors. Additionally, accuracy, precision, recall and f1 score has also been added to the heatmap. Also, I imported f1 score which fixed a bug for metrics function.

Type of change

What sort of change have you made:

• [x] 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 ran some cells to show the confusion matrix(for naive bayes) and it worked perfectly without giving any error in whole notebook.

Checklist:

• [x] My code follows the guidelines of this project.
• [x] I have performed a self-review of my own code.
• [ ] 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.
• [ ] Any dependent changes have been merged and published in downstream modules.

Screenshots

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[anuragc2001]

@KrishnenduDakshi2002 if everything looks good and you've no issues with the PR, we may merge it.

[KrishnenduDakshi2002]

@KrishnenduDakshi2002 if everything looks good and you've no issues with the PR, we may merge it.

okay I am merging PR and close this issue.