Implementando Gradient Boosting Programado Em Python
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Implementando Gradient Boosting Programado Em Python
Author: Vitor Amadeu Souza
language: pt-BR
Publisher: Clube de Autores
Release Date: 2025-07-07
O avanço do aprendizado de máquina transformou profundamente a maneira como lidamos com dados, tomamos decisões automatizadas e desenvolvemos sistemas inteligentes. Entre as técnicas mais eficazes e versáteis desse campo, destaca-se o Gradient Boosting, um poderoso método de ensemble que combina diversas árvores de decisão fracas para formar um modelo robusto e altamente preciso. Este livro apresenta uma abordagem prática e objetiva para quem deseja compreender e aplicar o Gradient Boosting em problemas de classificação usando Python. Com base em um exemplo claro e funcional, o leitor aprenderá como gerar conjuntos de dados sintéticos, treinar um modelo com o GradientBoostingClassifier do scikit-learn, fazer previsões e avaliar os resultados por meio de métricas como acurácia e matriz de confusão. O conteúdo é acessível tanto para iniciantes quanto para profissionais que desejam reforçar seus conhecimentos em técnicas supervisionadas de machine learning.
Practical Gradient Boosting
This book on Gradient Boosting methods is intended for students, academics, engineers, and data scientists who wish to discover in depth the functioning of this Machine Learning technique used to build decision tree ensembles. All the concepts are illustrated by examples of application code. They allow the reader to rebuild from scratch his own training library of Gradient Boosting methods. In parallel, the book presents the best practices of Data Science and provides the reader with a solid technical background to build Machine Learning models. After a presentation of the principles of Gradient Boosting citing the application cases, advantages and limitations, the reader is introduced to the details of the mathematical theory. A simple implementation is given to illustrate how it works. The reader is then armed to tackle the application and configuration of these methods. Data preparation, training, explanation of a model, management of Hyper Parameter Tuning and use of objective functions are covered in detail! The last chapters of the book extend the subject to the application of Gradient Boosting for time series, the presentation of the emblematic libraries XGBoost, CatBoost and LightGBM as well as the concept of multi-resolution models.
Hands-On Gradient Boosting with XGBoost and scikit-learn
Get to grips with building robust XGBoost models using Python and scikit-learn for deployment Key Features Get up and running with machine learning and understand how to boost models with XGBoost in no time Build real-world machine learning pipelines and fine-tune hyperparameters to achieve optimal results Discover tips and tricks and gain innovative insights from XGBoost Kaggle winners Book Description XGBoost is an industry-proven, open-source software library that provides a gradient boosting framework for scaling billions of data points quickly and efficiently. The book introduces machine learning and XGBoost in scikit-learn before building up to the theory behind gradient boosting. You'll cover decision trees and analyze bagging in the machine learning context, learning hyperparameters that extend to XGBoost along the way. You'll build gradient boosting models from scratch and extend gradient boosting to big data while recognizing speed limitations using timers. Details in XGBoost are explored with a focus on speed enhancements and deriving parameters mathematically. With the help of detailed case studies, you'll practice building and fine-tuning XGBoost classifiers and regressors using scikit-learn and the original Python API. You'll leverage XGBoost hyperparameters to improve scores, correct missing values, scale imbalanced datasets, and fine-tune alternative base learners. Finally, you'll apply advanced XGBoost techniques like building non-correlated ensembles, stacking models, and preparing models for industry deployment using sparse matrices, customized transformers, and pipelines. By the end of the book, you'll be able to build high-performing machine learning models using XGBoost with minimal errors and maximum speed. What you will learn Build gradient boosting models from scratch Develop XGBoost regressors and classifiers with accuracy and speed Analyze variance and bias in terms of fine-tuning XGBoost hyperparameters Automatically correct missing values and scale imbalanced data Apply alternative base learners like dart, linear models, and XGBoost random forests Customize transformers and pipelines to deploy XGBoost models Build non-correlated ensembles and stack XGBoost models to increase accuracy Who this book is for This book is for data science professionals and enthusiasts, data analysts, and developers who want to build fast and accurate machine learning models that scale with big data. Proficiency in Python, along with a basic understanding of linear algebra, will help you to get the most out of this book.