Focus Week · Aug 17–23 Eight data and AI paths open free for one week. No credit card required

Building a Spam Filter with Naive Bayes

  • Guided Project
  • 1.4 hours
  • Intermediate
  • Python

Practice using the Naive Bayes algorithm in Python to build a spam filter and classify SMS messages.

Overview

In this project, you'll take on the role of a data scientist tasked with building an SMS spam filter using the multinomial Naive Bayes algorithm. You'll work with a real-world dataset to clean and prepare text data, calculate probabilities, and train the algorithm to classify messages as spam or ham. This hands-on project allows you to apply your knowledge of conditional probability and Naive Bayes to solve a practical problem. You'll strengthen your skills in data preparation, probability calculations, and implementing machine learning algorithms in Python. The project will be a valuable addition to your portfolio, demonstrating your ability to build a functional spam filter. **Objective:** Use the multinomial Naive Bayes algorithm to create an SMS spam filter in Python, developing your machine learning skills with a practical application.

What You'll Learn

  • Create a spam filter using multinomial Naive Bayes
  • Expand your portfolio using conditional probability and Naive Bayes
  • Employ conditional probability concepts

Before You Start

  • Assigning probabilities based on specific conditions
  • Updating probabilities using prior knowledge
  • Employing Naive Bayes for spam filter classification
  • Applying the multinomial Naive Bayes algorithm

Project Steps

10 steps

  1. 1 Exploring the Dataset
  2. 2 Training and Test Set
  3. 3 Letter Case and Punctuation
  4. 4 Creating the Vocabulary
  5. 5 The Final Training Set
  6. 6 Calculating Constants First
  7. 7 Calculating Parameters
  8. 8 Classifying A New Message
  9. 9 Measuring the Spam Filter's Accuracy
  10. 10 Next Steps

Join 1M+ data learners on Dataquest.

  1. 1

    Create a free account

  2. 2

    Choose a learning path

  3. 3

    Complete exercises and projects

  4. 4

    Advance your career