Book Image

Hands-On Data Science with the Command Line

By : Jason Morris, Chris McCubbin, Raymond Page
Book Image

Hands-On Data Science with the Command Line

By: Jason Morris, Chris McCubbin, Raymond Page

Overview of this book

The Command Line has been in existence on UNIX-based OSes in the form of Bash shell for over 3 decades. However, very little is known to developers as to how command-line tools can be OSEMN (pronounced as awesome and standing for Obtaining, Scrubbing, Exploring, Modeling, and iNterpreting data) for carrying out simple-to-advanced data science tasks at speed. This book will start with the requisite concepts and installation steps for carrying out data science tasks using the command line. You will learn to create a data pipeline to solve the problem of working with small-to medium-sized files on a single machine. You will understand the power of the command line, learn how to edit files using a text-based and an. You will not only learn how to automate jobs and scripts, but also learn how to visualize data using the command line. By the end of this book, you will learn how to speed up the process and perform automated tasks using command-line tools.
Table of Contents (8 chapters)

Performing a word count

Now that we have some data to work with, let's combine the two files together into a single file. To do so, perform the following:

cat *.tsv > reviews.tsv

This is what you should see once you run the preceding command:

Excellent. Let's say we wanted to count how many words or lines are in this file. Let's introduce the wc command. wc is short for (you guessed it) word count. Let's quickly man wc to see the options available:

Looks like wc can count the lines and also the words of a file. Let's see how many lines our file actually has:

wc -l reviews.tsv

The following is what you should see once you run the preceding command:

That's a lot of lines! What about words? Run the following:

wc -w reviews.tsv

This looks like a great dataset to use. It's not big data by any means, but there's a lot of cool stuff we...