目录 Preface Chapter 1:Journey from Statistics to Machine Learning Statistical terminology for model building and validation Machine learning Major differences between statistical modeling and machine learning Steps in machine learning model development and deployment Statistical fundamentals and terminology for model building andvalidation Bias versus variance trade-off Train and test data Machine learning terminology for model building and validation Linear regression versus gradient descent Machine learning losses When to stop tuning machine learning models Train, validation, and test data Cross-validation Grid search Machine learning model overview Summary Chapter 2:Parallelism of Statistics and Machine Learning Comparison between regression and machine learning models Compensating factors in machine learning models Assumptions of linear regression Steps applied in linear regression modeling Example of simple linear regression from first principles Example of simple linear regression using the wine quality data Example of multilinear regression-step-by-step methodology of model building Backward and forward selection Machine learning models-ridge and lasso regression Example of ridge regression machine learning Example of lasso regression machine learning model Regularization parameters in linear regression and ridge/lasso regression Summary Chapter 3:Logistic Regression Versus Random Forest Maximum likelihood estimation Logistic regression-introduction and advantages Terminology involved in logistic regression Applying steps in logistic regression modeling Example of logistic regression using German credit data Random forest Example of random forest using German credit data Grid search on random forest Variable importance plot Comparison of logistic regression with random forest Summary Chapter 4:Tree-Based Machine Learning Models Introducing decision tree classifiers Terminology used in decision trees Decision tree working methodology from first principles Comparison between logistic regression and decision trees Comparison of error components across various styles of models Remedial actions to push the model towards the ideal region HR attrition data example Decision tree classifier Tuning class weights in decision tree classifier Bagging classifier Random forest classifier Random forest classifier-grid search AdaBoost classifier Gradient boosting classifier Comparison between AdaBoosting versus gradient boosting Extreme gradient boosting-XGBoost classifier Ensemble of ensembles-model stacking Ensemble of ensembles with different types of classifiers Ensemble of ensembles with bootstrap samples using a single type of classifier Summary Chapter 5:K-Nearest Neighbors and Naive Bayes K-nearest neighbors KNN voter example Curse of dimensionality Curse of dimensionality with 1D, 2D, and 3D example KNN classifier with breast cancer Wisconsin data example Tuning of k-value in KNN classifier Naive Bayes Probability fundamentals Joint probability Understanding Bayes theorem with conditional probability Naive Bayes classification Laplace estimator Naive Bayes SMS spam classification example Summary Chapter 6:Support Vector Machines and Neural Networks Support vector machines working principles Maximum margin classifier Support vector classifier Support vector machines Kernel functions SVM multilabel classifier with letter recognition data example Maximum margin classifier-linear kernel Polynomial kernel RBF kernel Artifi neural networks-ANN Activation functions Forward propagation and backpropagation Optimization of neural networks Stochastic gradient descent-SGD Momentum Nesterov accelerated gradient-NAG Adagrad Adadelta RMSprop Adaptive moment estimation-Adam Limited-memory broyden-fletcher-goldfarb-shanno-L-BFGS optimization algorithm Dropout in neural networks ANN classifier applied on handwritten digits using scikit-learn Introduction to deep learning Solving methodology Deep learning software Deep neural network classifier applied on handwritten digits using Keras Summary Chapter 7:Recommendation Engines Content-based filtering Cosine similarity Collaborative filtering Advantages of collaborative filtering over content-based filtering Matrix factorization using the alternating least squares algorithm for collaborative filtering Evaluation of recommendation engine model Hyperparameter selection in recommendation engines using grid search Recommendation engine application on movie lens data User-user similarity matrix Movie-movie similarity matrix Collaborative filtering using ALS Grid search on collaborative filtering Summary Chapter 8:Unsupervised Learning K-means clustering K-means working methodology from first principles Optimal number of clusters and cluster evaluation The elbow method K-means clustering with the iris data example Principal component analysis-PCA PCA working methodology from first principles PCA applied on handwritten digits using scikit-learn Singular value decomposition-SVD SVD applied on handwritten digits using scikit-learn Deep auto encoders Model building technique using encoder-decoder architecture Deep auto encoders applied on handwritten digits using Keras Summary Chapter 9:Reinforcement Learning Introduction to reinforcement learning Comparing supervised, unsupervised, and reinforcement learning in detail Characteristics of reinforcement learning Reinforcement learning basics Category 1-value based Category 2-policy based Category 3-actor-critic Category 4-model-free Category 5-model-based Fundamental categories in sequential decision making Markov decision processes and Bellman equations Dynamic programming Algorithms to compute optimal policy using dynamic programming Grid world example using value and policy iteration algorithms with basic Python Monte Carlo methods Comparison between dynamic programming and Monte Carlo methods Key advantages of MC over DP methods Monte Carlo prediction The suitability of Monte Carlo prediction on grid-world problems Modeling Blackjack example of Monte Carlo methods using Python Temporal difference learning Comparison between Monte Carlo methods and temporal difference learning TD prediction Driving office example for TD learning SARSA on-policy TD control Q-learning-off-policy TD control Cliff walking example of on-policy and off-policy of TD control Applications of reinforcement learning with integration of machine learning and deep learning Automotive vehicle control-self-driving cars Google DeepMinds AlphaGo Robo soccer Further reading Summary Index
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