Addition of BoW algorithm Code

[Arushi-N4]

Closes: #24

• Title : Addition of Bag-of-Words Algorithm Code
• Name: Arushi Nirala
• Idenitfy yourself: SSOC 2024 Contributor

Describe the add-ons or changes you've made 📃

After learning from online resources, I added code of bag of words (BoW) Algorithm which include

1. Preprocessing: The preprocess_text function converts text to lowercase and removes non-alphabetic characters.
2. Bag-of-Words Vectorization: Using CountVectorizer from scikit-learn, it creates a matrix where each row represents a document and each column represents a word in the vocabulary.
3. Stop Words Removal: Stop words like "the", "is", "are", and "and" are removed during vectorization using stop_words='english'.
4. Feature Extraction: vectorizer.get_feature_names_out() retrieves the feature names (words) after preprocessing and stop word removal.
5. DataFrame Representation: The resulting bag-of-words matrix is converted into a Pandas DataFrame (bow_df), where rows are labeled by document numbers and columns by word names.

Type of change ☑️

• Bug fix (non-breaking change which fixes an issue)
• 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? ⚙️

I tested the code in Jupyter Notebook and VS Code by running it with sample text data, verifying preprocessing steps, and inspecting the generated bag-of-words dataframe for correctness

Checklist: ☑️

• My code follows the Contributing Guidelines & Code of Conduct of this project.
• This PR does not contain plagiarized content.
• I have performed a self-review of my own code.
• I have commented my code, particularly wherever it was hard to understand.
• My changes generate no new warnings.

Screenshots 📷

Note to reviewers 📄

Please review my changes and let me know if any further adjustments or changes are needed

[github-actions]

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[Arushi-N4]

• I changed the folder name and converted .ipynb into .py file as per your request.

• Screenshot

Kindly review it

[Avdhesh-Varshney]

@Arushi-N4 PR Approved 🎉