HIGH-YIELD REVISION GUIDE & CHEAT SHEET
Python for Data Science & Machine
Learning Complete Semester Guide
High-Yield Comprehensive Guide, OLS Normal Equations, Gradient Descent
Traces, ROC-AUC Math & Quick-Cram Appendix
Computer Science & Artificial Intelligence | Course Code: CS 189 / DATA 100 / CS 229 |
2024-2025 Comprehensive Edition
📘 WHAT’S INSIDE THIS GUIDE:
✔ NumPy Vectorization & Matrix Operations: Broadcasting semantics, memory views vs copies,
and tensor dot products
✔ Supervised Regression Theory: Mathematical derivation of Ordinary Least Squares (OLS)
closed-form solution and geometric projections
✔ WORKED STEP-BY-STEP PROBLEM: Step-by-step matrix calculation of (X^T X)^(-1) X^T y on
sample data
✔ Regularization Mechanics: L1 Lasso (L1-norm diamond constraints) vs. L2 Ridge (spherical
shrinkage) and Bias-Variance tradeoff
✔ Classification Diagnostics: Confusion Matrix, Precision, Recall, F1-Score, and step-by-step
Trapezoidal ROC-AUC calculation
✔ Tree Ensembles: Information Gain (Entropy & Gini), Bagging vs. Boosting (Random Forest
variance reduction vs. XGBoost bias reduction)
✔ 10 Deadly Machine Learning Exam Traps (Data leakage during scaling, accuracy paradox on
imbalanced classes, temporal splits)
✔ APPENDIX: 1-Hour Emergency Pre-Exam Quick-Cram Cheat Sheet with master pipeline syntax
and 25 active recall flashcards
, Computer Science & Artificial Intelligence · CS 189 /Python for Data Science & Machine Learning Complete
DATA 100 / CS 229 Semester Guide
Disclaimer: This is an independently created academic study aid. It is not affiliated with, endorsed by, or sponsored by any specific
university, textbook author, or publisher.
Independent Study Aid. Not affiliated with or endorsed by any specific university or Page 2 of 7
publisher.
Python for Data Science & Machine
Learning Complete Semester Guide
High-Yield Comprehensive Guide, OLS Normal Equations, Gradient Descent
Traces, ROC-AUC Math & Quick-Cram Appendix
Computer Science & Artificial Intelligence | Course Code: CS 189 / DATA 100 / CS 229 |
2024-2025 Comprehensive Edition
📘 WHAT’S INSIDE THIS GUIDE:
✔ NumPy Vectorization & Matrix Operations: Broadcasting semantics, memory views vs copies,
and tensor dot products
✔ Supervised Regression Theory: Mathematical derivation of Ordinary Least Squares (OLS)
closed-form solution and geometric projections
✔ WORKED STEP-BY-STEP PROBLEM: Step-by-step matrix calculation of (X^T X)^(-1) X^T y on
sample data
✔ Regularization Mechanics: L1 Lasso (L1-norm diamond constraints) vs. L2 Ridge (spherical
shrinkage) and Bias-Variance tradeoff
✔ Classification Diagnostics: Confusion Matrix, Precision, Recall, F1-Score, and step-by-step
Trapezoidal ROC-AUC calculation
✔ Tree Ensembles: Information Gain (Entropy & Gini), Bagging vs. Boosting (Random Forest
variance reduction vs. XGBoost bias reduction)
✔ 10 Deadly Machine Learning Exam Traps (Data leakage during scaling, accuracy paradox on
imbalanced classes, temporal splits)
✔ APPENDIX: 1-Hour Emergency Pre-Exam Quick-Cram Cheat Sheet with master pipeline syntax
and 25 active recall flashcards
, Computer Science & Artificial Intelligence · CS 189 /Python for Data Science & Machine Learning Complete
DATA 100 / CS 229 Semester Guide
Disclaimer: This is an independently created academic study aid. It is not affiliated with, endorsed by, or sponsored by any specific
university, textbook author, or publisher.
Independent Study Aid. Not affiliated with or endorsed by any specific university or Page 2 of 7
publisher.
