Book Image

Large Scale Machine Learning with Python

By : Luca Massaron, Bastiaan Sjardin, Alberto Boschetti
Book Image

Large Scale Machine Learning with Python

By: Luca Massaron, Bastiaan Sjardin, Alberto Boschetti

Overview of this book

Large Python machine learning projects involve new problems associated with specialized machine learning architectures and designs that many data scientists have yet to tackle. But finding algorithms and designing and building platforms that deal with large sets of data is a growing need. Data scientists have to manage and maintain increasingly complex data projects, and with the rise of big data comes an increasing demand for computational and algorithmic efficiency. Large Scale Machine Learning with Python uncovers a new wave of machine learning algorithms that meet scalability demands together with a high predictive accuracy. Dive into scalable machine learning and the three forms of scalability. Speed up algorithms that can be used on a desktop computer with tips on parallelization and memory allocation. Get to grips with new algorithms that are specifically designed for large projects and can handle bigger files, and learn about machine learning in big data environments. We will also cover the most effective machine learning techniques on a map reduce framework in Hadoop and Spark in Python.

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Large Scale Machine Learning with Python
Luca Massaron | Bastiaan Sjardin | Alberto Boschetti
Aug, 2016 | 420 pages
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Table of Contents (17 chapters)
Large Scale Machine Learning with Python
Large Scale Machine Learning with Python
Credits
Credits
About the Authors
About the Authors
About the Reviewer
About the Reviewer
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
First Steps to Scalability
First Steps to Scalability
Explaining scalability in detail
Python for large scale machine learning
Python packages
Summary
2
Scalable Learning in Scikit-learn
Scalable Learning in Scikit-learn
Out-of-core learning
Streaming data from sources
Stochastic learning
Feature management with data streams
Summary
3
Fast SVM Implementations
Fast SVM Implementations
Datasets to experiment with on your own
Support Vector Machines
Feature selection by regularization
Including non-linearity in SGD
Hyperparameter tuning
Summary
4
Neural Networks and Deep Learning
Neural Networks and Deep Learning
The neural network architecture
Neural networks and regularization
Neural networks and hyperparameter optimization
Neural networks and decision boundaries
Deep learning at scale with H2O
Deep learning and unsupervised pretraining
Deep learning with theanets
Autoencoders and unsupervised learning
Summary
5
Deep Learning with TensorFlow
Deep Learning with TensorFlow
TensorFlow installation
Machine learning on TensorFlow with SkFlow
Keras and TensorFlow installation
Convolutional Neural Networks in TensorFlow through Keras
CNN's with an incremental approach
GPU Computing
Summary
6
Classification and Regression Trees at Scale
Classification and Regression Trees at Scale
Bootstrap aggregation
Random forest and extremely randomized forest
Fast parameter optimization with randomized search
CART and boosting
XGBoost
Out-of-core CART with H2O
Summary
7
Unsupervised Learning at Scale
Unsupervised Learning at Scale
Unsupervised methods
Feature decomposition – PCA
PCA with H2O
Clustering – K-means
K-means with H2O
LDA
Summary
8
Distributed Environments – Hadoop and Spark
Distributed Environments – Hadoop and Spark
From a standalone machine to a bunch of nodes
Setting up the VM
The Hadoop ecosystem
Spark
Summary
9
Practical Machine Learning with Spark
Practical Machine Learning with Spark
Setting up the VM for this chapter
Sharing variables across cluster nodes
Data preprocessing in Spark
Machine learning with Spark
Summary
Introduction to GPUs and Theano
Introduction to GPUs and Theano
GPU computing
Theano – parallel computing on the GPU
Installing Theano
Index
Index

Chapter 1. First Steps to Scalability

Welcome to this book on scalable machine learning with Python.

In this chapter, we will discuss how to learn effectively from big data with Python and how it can be possible using your single machine or a cluster of other machines, which you can get, for instance, from Amazon Web Services (AWS) or the Google Cloud Platform.

In the book, we will be using Python's implementation of machine learning algorithms that are scalable. This means that they can work with a large amount of data and do not crash because of memory constraints. They also take a reasonable amount of time, which is something manageable for a data science prototype and also deployment in production. Chapters are organized around solutions (such as streaming data), algorithms (such as neural networks or ensemble of trees), and frameworks (such as Hadoop or Spark). We will also provide you with some basic reminders about the machine learning algorithms and explain how to make them scalable and suitable to problems with massive datasets.

Given such premises as a start, you'll need to learn the basics (so as to figure out the perspective under which this book has been written) and set up all your basic tools to start reading the chapters immediately.

In this chapter, we will introduce you to the following topics:

  • What scalability actually means

  • What bottlenecks you should pay attention to when dealing with data

  • What kind of problems this book will help you solve

  • How to use Python to analyze datasets at scale effectively

  • How to set up your machine quickly to execute the examples presented in this book

Let's start this journey together around scalable solutions with Python!

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