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  • Book Overview & Buying Apache Mahout Essentials
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Apache Mahout Essentials

Apache Mahout Essentials

By : Jayani Withanawasam
3.7 (3)
Buy this Book
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Apache Mahout Essentials

Apache Mahout Essentials

3.7 (3)
By: Jayani Withanawasam
Buy this Book

Overview of this book

If you are a Java developer or data scientist, haven't worked with Apache Mahout before, and want to get up to speed on implementing machine learning on big data, then this is the perfect guide for you.
Table of Contents (8 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Introducing Apache Mahout
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1. Introducing Apache Mahout
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Machine learning in a nutshell
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Machine learning applications
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Machine learning libraries
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The story so far
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Apache Mahout
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How Apache Mahout works?
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From Hadoop MapReduce to Spark
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When is it appropriate to use Apache Mahout?
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Summary
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2. Clustering
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2. Clustering
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Unsupervised learning and clustering
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Applications of clustering
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Types of clustering
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K-Means clustering
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Distance measure
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K-Means clustering with MapReduce
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Additional clustering algorithms
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Text clustering
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Optimizing clustering performance
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Summary
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3. Regression and Classification
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3. Regression and Classification
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Supervised learning
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Predictive analytics' techniques
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Classification versus regression
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Linear regression with Apache Spark
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Logistic regression with SGD
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The Naïve Bayes algorithm
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Hidden Markov Model
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Summary
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4. Recommendations
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4. Recommendations
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Collaborative versus content-based filtering
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User-based recommenders
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Item-based recommenders
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Matrix factorization-based recommenders
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Singular value decomposition
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Summary
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5. Apache Mahout in Production
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5. Apache Mahout in Production
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Introduction
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Apache Mahout with Hadoop
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Setting up Hadoop
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Monitoring Hadoop
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Setting up Mahout with Hadoop's fully-distributed mode
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Troubleshooting Hadoop
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Optimization tips
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Summary
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6. Visualization
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6. Visualization
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The significance of visualization in machine learning
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D3.js
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A visualization example for K-Means clustering
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Summary
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Index
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Index

Linear regression with Apache Spark

Linear regression is the most commonly used method for describing the relationship between predictors (or covariates) and outcomes.

Linear regression can solve problems that require a continuous target variable to predict real, valued outcomes. There can be multiple variables or features in the problem domain.

How does linear regression work?

Linear regression focuses on finding optimal values for parameters (coefficients) to fit the best possible hyper plane to the training data.

Linear regression is approached as a minimization problem. The mean squared error, which is the difference between the expected outcome and the actual outcome for the training set, is minimized.

The squared error function is also known as the cost function. So, the goal is to minimize the cost function.

Each value of the parameter given in the cost function refers to one hypothesis function. The idea is to find the optimal hypothesis that has values for parameters which best minimize...

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