Book Image

Training Systems using Python Statistical Modeling

By : Curtis Miller
Book Image

Training Systems using Python Statistical Modeling

By: Curtis Miller

Overview of this book

Python's ease-of-use and multi-purpose nature has made it one of the most popular tools for data scientists and machine learning developers. Its rich libraries are widely used for data analysis, and more importantly, for building state-of-the-art predictive models. This book is designed to guide you through using these libraries to implement effective statistical models for predictive analytics. You’ll start by delving into classical statistical analysis, where you will learn to compute descriptive statistics using pandas. You will focus on supervised learning, which will help you explore the principles of machine learning and train different machine learning models from scratch. Next, you will work with binary prediction models, such as data classification using k-nearest neighbors, decision trees, and random forests. The book will also cover algorithms for regression analysis, such as ridge and lasso regression, and their implementation in Python. In later chapters, you will learn how neural networks can be trained and deployed for more accurate predictions, and understand which Python libraries can be used to implement them. By the end of this book, you will have the knowledge you need to design, build, and deploy enterprise-grade statistical models for machine learning using Python and its rich ecosystem of libraries for predictive analytics.

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Table of Contents (9 chapters)
Preface
Preface
Who this book is for
What this book covers
To get the most out of this book
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1
Classical Statistical Analysis
Classical Statistical Analysis
Technical requirements
Computing descriptive statistics
Classical inference for proportions
Classical inference for means
Diving into Bayesian analysis
Bayesian analysis for proportions
Bayesian analysis for means
Finding correlations
Summary
2
Introduction to Supervised Learning
Introduction to Supervised Learning
Principles of machine learning
Training models
Evaluating models
Summary
3
Binary Prediction Models
Binary Prediction Models
K-nearest neighbors classifier
Decision trees
Random forests
Naive Bayes classifier
Support vector machines
Logistic regression
Extending beyond binary classifiers
Summary
4
Regression Analysis and How to Use It
Regression Analysis and How to Use It
Linear models
Evaluating linear models
Bayesian linear models
Ridge regression
LASSO regression
Spline interpolation
Summary
5
Neural Networks
Neural Networks
An introduction to perceptrons
Neural networks
MLPs for classification
MLP for regression
Summary
6
Clustering Techniques
Clustering Techniques
Introduction to clustering
Exploring the k-means algorithm
Evaluating clusters
Hierarchical clustering
Spectral clustering
Summary
7
Dimensionality Reduction
Dimensionality Reduction
Introducing dimensionality reduction
Principal component analysis
Singular value decomposition
Low-dimensional representation
Summary
8
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MLP for regression

In this final section, we will examine how to train an MLP for regression. When it comes to regression, there is a little more to say about the MLP. As it turns out, the only thing that changes is the activation function for the final nodes in the network that produces predictions. They allow for a wide range of outputs, not just the output from a set of classes. All the issues and hyperparameters are the same, as in the case of classification. Of course, in the regression context, you may end up making different choices than for classification.

So, let's now demonstrate regression using neural networks:

  1. We're going to be working with the Boston dataset. We're going to import MLPRegressor in order to be able to do the regression, and we're still going to be using the mean_squared_error metric to assess the quality of our fit, using the following...
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