Randomizedsearchcv
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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.
Hyperparameter Tuning with Python
Take your machine learning models to the next level by learning how to leverage hyperparameter tuning, allowing you to control the model's finest details Key Features • Gain a deep understanding of how hyperparameter tuning works • Explore exhaustive search, heuristic search, and Bayesian and multi-fidelity optimization methods • Learn which method should be used to solve a specific situation or problem Book Description Hyperparameters are an important element in building useful machine learning models. This book curates numerous hyperparameter tuning methods for Python, one of the most popular coding languages for machine learning. Alongside in-depth explanations of how each method works, you will use a decision map that can help you identify the best tuning method for your requirements. You'll start with an introduction to hyperparameter tuning and understand why it's important. Next, you'll learn the best methods for hyperparameter tuning for a variety of use cases and specific algorithm types. This book will not only cover the usual grid or random search but also other powerful underdog methods. Individual chapters are also dedicated to the three main groups of hyperparameter tuning methods: exhaustive search, heuristic search, Bayesian optimization, and multi-fidelity optimization. Later, you will learn about top frameworks like Scikit, Hyperopt, Optuna, NNI, and DEAP to implement hyperparameter tuning. Finally, you will cover hyperparameters of popular algorithms and best practices that will help you efficiently tune your hyperparameter. By the end of this book, you will have the skills you need to take full control over your machine learning models and get the best models for the best results. What you will learn • Discover hyperparameter space and types of hyperparameter distributions • Explore manual, grid, and random search, and the pros and cons of each • Understand powerful underdog methods along with best practices • Explore the hyperparameters of popular algorithms • Discover how to tune hyperparameters in different frameworks and libraries • Deep dive into top frameworks such as Scikit, Hyperopt, Optuna, NNI, and DEAP • Get to grips with best practices that you can apply to your machine learning models right away Who this book is for This book is for data scientists and ML engineers who are working with Python and want to further boost their ML model's performance by using the appropriate hyperparameter tuning method. Although a basic understanding of machine learning and how to code in Python is needed, no prior knowledge of hyperparameter tuning in Python is required.
Next-Level Data Science
Author: Jason Brownlee
language: en
Publisher: Machine Learning Mastery
Release Date: 2024-11-04
Data science is a relatively new term coined in the past decade. While it shares much in common with traditional statistics, it warrants its own name, as modern computer technology has introduced tools that can tackle challenges previously unsolvable, such as machine learning models. However, these new tools demand new techniques. You might be surprised to find that even slight adjustments to hyperparameters or changes in data preprocessing can significantly alter a model’s output. This ebook concentrates on two fundamental yet widely applicable models in data science: linear regression and decision trees. The focus here isn’t just to explain these models but to use them as examples, illustrating the key considerations you should bear in mind when working on a data science project. Next Level Data Science is designed to help you cultivate an effective mindset for data science projects, enabling you to work more efficiently. Written in the approachable and engaging style you know from Machine Learning Mastery, this ebook will guide you on where to start and what to prioritize when drawing insights from data.