🌟 Machine Learning Cheat Sheet
1️⃣ Types of Machine Learning Supervised Learning Meaning: Model learns from labeled data (input + correct answer). Examples: Predict price (regression) Predict category (classification) Unsupervised Learning Meaning: Model learns patterns from unlabeled data (no correct answers). Examples: Group similar customers (clustering) Reduce dimensions (PCA) Reinforcement Learning Meaning: Model learns by trial and error using rewards. Example: Playing chess Robot navigation 2️⃣ Common ML Algorithms (with definitions) Linear Regression Meaning: Predicts a number using a straight-line relationship. Logistic Regression Meaning: Predicts categories (yes/no, spam/not spam). Uses a sigmoid (S-shaped curve). Decision Tree Meaning: Predicts by learning rules (like a flowchart): “Is salary > 50k? → Yes → Next condition...” Random Forest Meaning: Many decision trees vote together → more accurate, less overfitting. K-Means Clustering Meaning: Groups data into K clusters by distan...