Sign In Start Free Trial
Account

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Book Overview & Buying Learning PySpark
  • Table Of Contents Toc
Learning PySpark

Learning PySpark

By : Drabas, Lee
3.9 (194)
close
close
Learning PySpark

Learning PySpark

3.9 (194)
By: Drabas, Lee

Overview of this book

Apache Spark is an open source framework for efficient cluster computing with a strong interface for data parallelism and fault tolerance. This book will show you how to leverage the power of Python and put it to use in the Spark ecosystem. You will start by getting a firm understanding of the Spark 2.0 architecture and how to set up a Python environment for Spark. You will get familiar with the modules available in PySpark. You will learn how to abstract data with RDDs and DataFrames and understand the streaming capabilities of PySpark. Also, you will get a thorough overview of machine learning capabilities of PySpark using ML and MLlib, graph processing using GraphFrames, and polyglot persistence using Blaze. Finally, you will learn how to deploy your applications to the cloud using the spark-submit command. By the end of this book, you will have established a firm understanding of the Spark Python API and how it can be used to build data-intensive applications.
Table of Contents (13 chapters)
close
close
12
Index

Predicting infant survival


Finally, we can move to predicting the infants' survival chances. In this section, we will build two models: a linear classifier—the logistic regression, and a non-linear one—a random forest. For the former one, we will use all the features at our disposal, whereas for the latter one, we will employ a ChiSqSelector(...) method to select the top four features.

Logistic regression in MLlib

Logistic regression is somewhat a benchmark to build any classification model. MLlib used to provide a logistic regression model estimated using a stochastic gradient descent (SGD) algorithm. This model has been deprecated in Spark 2.0 in favor of the LogisticRegressionWithLBFGS model.

The LogisticRegressionWithLBFGS model uses the Limited-memory Broyden–Fletcher–Goldfarb–Shanno (BFGS) optimization algorithm. It is a quasi-Newton method that approximates the BFGS algorithm.

Note

For those of you who are mathematically adept and interested in this, we suggest perusing this blog post...

Visually different images
CONTINUE READING
83
Tech Concepts
36
Programming languages
73
Tech Tools
Icon Unlimited access to the largest independent learning library in tech of over 8,000 expert-authored tech books and videos.
Icon Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.
Icon 50+ new titles added per month and exclusive early access to books as they are being written.
Learning PySpark
notes
bookmark Notes and Bookmarks search Search in title playlist Add to playlist download Download options font-size Font size

Change the font size

margin-width Margin width

Change margin width

day-mode Day/Sepia/Night Modes

Change background colour

Close icon Search
Country selected

Close icon Your notes and bookmarks

Confirmation

Modal Close icon
claim successful

Buy this book with your credits?

Modal Close icon
Are you sure you want to buy this book with one of your credits?
Close
YES, BUY

Submit Your Feedback

Modal Close icon
Modal Close icon
Modal Close icon