Practical Machine Learning with R: Define, build, and evaluate machine learning models for real-world applications

Jeyaraman

Wambugu

Olsen

R$217.99

5 (1 Ratings)

Paperback Aug 2019 416 pages 1st Edition

Jeyaraman

Wambugu

Olsen

R$217.99

5 (1 Ratings)

Paperback Aug 2019 416 pages 1st Edition

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Key benefits

Gain a comprehensive overview of different machine learning techniques
Explore various methods for selecting a particular algorithm
Implement a machine learning project from problem definition through to the final model

Description

With huge amounts of data being generated every moment, businesses need applications that apply complex mathematical calculations to data repeatedly and at speed. With machine learning techniques and R, you can easily develop these kinds of applications in an efficient way. Practical Machine Learning with R begins by helping you grasp the basics of machine learning methods, while also highlighting how and why they work. You will understand how to get these algorithms to work in practice, rather than focusing on mathematical derivations. As you progress from one chapter to another, you will gain hands-on experience of building a machine learning solution in R. Next, using R packages such as rpart, random forest, and multiple imputation by chained equations (MICE), you will learn to implement algorithms including neural net classifier, decision trees, and linear and non-linear regression. As you progress through the book, you’ll delve into various machine learning techniques for both supervised and unsupervised learning approaches. In addition to this, you’ll gain insights into partitioning the datasets and mechanisms to evaluate the results from each model and be able to compare them. By the end of this book, you will have gained expertise in solving your business problems, starting by forming a good problem statement, selecting the most appropriate model to solve your problem, and then ensuring that you do not overtrain it.

Who is this book for?

If you are a data analyst, data scientist, or a business analyst who wants to understand the process of machine learning and apply it to a real dataset using R, this book is just what you need. Data scientists who use Python and want to implement their machine learning solutions using R will also find this book very useful. The book will also enable novice programmers to start their journey in data science. Basic knowledge of any programming language is all you need to get started.

What you will learn

Define a problem that can be solved by training a machine learning model
Obtain, verify and clean data before transforming it into the correct format for use
Perform exploratory analysis and extract features from data
Build models for neural net, linear and non-linear regression, classification, and clustering
Evaluate the performance of a model with the right metrics
Implement a classification problem using the neural net package
Employ a decision tree using the random forest library

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floren25 Jun 22, 2021

Los ejercicios y actividades propuestos en este libro son esenciales para el aprendizaje efectivo de Machine Learning. Los autores incluyen en el texto soluciones detalladas de unos y otras, de modo que puedes contrastar lo que has hecho con las respuestas correctas.Incluyen capítulos sobre limpieza y preprocesamiento de datos (la parte más ardua y costosa en tiempo de un análisis de aprendizaje automático), el cálculo mediante diversos métodos de la importancia relativa de las variables dentro de una base de datos, las redes neuronales artificiales y las diversas métricas para calibrar su idoneidad en modelos de clasificación (exactitud, precisión, sensibilidad, puntuación F1) y en modelos de regresión (coeficiente de determinación, raíz cuadrada del error cuadrático medio, error medio absoluto, entre otros).El grueso del libro está consagrado al aprendizaje supervisado. Sólo en el último capítulo, el 6º, se introduce el aprendizaje no supervisado, con especial atención a la técnica de k-means clustering.Hay que advertir, eso sí, que los autores apenas se detienen a explicar cómo se escribe código en R ni tampoco aclaran la mayoría de los conceptos estadísticos que emplean. Todo esto lo dan por sabido en el que leyere. De modo que este libro, con ser excelente y muy didáctico, no es para primerizos en el área.

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Practical Machine Learning with R: Define, build, and evaluate machine learning models for real-world applications

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