Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
Data Science with SQL Server Quick Start Guide

You're reading from   Data Science with SQL Server Quick Start Guide Integrate SQL Server with data science

Arrow left icon
Product type Paperback
Published in Aug 2018
Publisher Packt
ISBN-13 9781789537123
Length 206 pages
Edition 1st Edition
Languages
Arrow right icon
Author (1):
Arrow left icon
Dejan Sarka Dejan Sarka
Author Profile Icon Dejan Sarka
Dejan Sarka
Arrow right icon
View More author details
Toc

Table of Contents (10) Chapters Close

Preface 1. Writing Queries with T-SQL FREE CHAPTER 2. Introducing R 3. Getting Familiar with Python 4. Data Overview 5. Data Preparation 6. Intermediate Statistics and Graphs 7. Unsupervised Machine Learning 8. Supervised Machine Learning 9. Other Books You May Enjoy

Data Preparation

Unfortunately, much of the data you get to work with is not immediately useful for a data science project. A major part of the work on such a project is the data preparation part. There are many different issues you could have with your data. You might have some missing values in it. Maybe you need to group some continuous variables in a limited number of bins—this means having to bin or to discretize them. Immediately, you realize that the discretionary is not a particularly straightforward process. Maybe you need to create numerical variables from categorical ones. You create so-called dummy variables, or dummies, from values of a categorical variable. Sometimes, you need to aggregate data over some groups defined with one or more variables, and further operate on aggregated data.

This chapter will introduce you to some of the basic data preparation tasks...

lock icon The rest of the chapter is locked
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at $19.99/month. Cancel anytime
Banner background image