Data Science
Introduction to Machine Learning
Senior Data Analyst
May 5, 2026
6 min read
What is Machine Learning?
Instead of writing rules, you give the computer data and let it learn the rules itself.
Types of ML
1. **Supervised Learning**: You have labels (Y). Predict outcomes.
2. **Unsupervised Learning**: No labels. Find patterns (clustering).
3. **Reinforcement Learning**: Learn from trial and error.
The ML Workflow
1. Get data.
2. Clean and prepare features.
3. Split into Train/Test.
4. Train a model.
5. Evaluate.
6. Iterate.
*Day 126: Train/Test Split.*