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End-to-End Data Science with SAS: A Hands-On Programming Guide
End-to-End Data Science with SAS®: A Hands-On Programming Guide. Copyright © 2020 SAS Institute Inc.
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The correct bibliographic citation for this manual is as follows: Gearhart, James. 2020. End-to-End Data Science with
SAS®: A Hands-On Programming Guide. Cary, NC: SAS Institute Inc. End-to-End Data Science with SAS®: A Hands-On Programming GuideCopyright ©
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party software distributed with SAS software, refer to http://support.sas.com/thirdpartylicenses.Contents
About This Book ................................................................................................................. vii
About The Author .............................................................................................................. xiii
Chapter 1: Data Science Overview ....................................................................................... 1
Introduction to This Book .........................................................................................................................................1
The Current Data Science Landscape ....................................................................................................................3
Introduction to Data Science Concepts ...................................................................................................................7
Chapter Review ..................................................................................................................................................... 36 Chapter 2: Example Step-by-Step Data Science Project .................................................... 37 Overview ............................................................................................................................................................... 37
Business Opportunity ............................................................................................................................................ 38
Initial Questions ..................................................................................................................................................... 40
Get the Data .......................................................................................................................................................... 43
Select a Performance Measure
............................................................................................................................. 46
Train / Test Split .................................................................................................................................................... 46
Target Variable Analysis ....................................................................................................................................... 48
Predictor Variable Analysis ................................................................................................................................... 54
Adjusting the TEST Data Set ................................................................................................................................ 69
Building a Predictive Model ................................................................................................................................... 70
Decision Time
....................................................................................................................................................... 93
Implementation ...................................................................................................................................................... 96
Chapter Review ................................................................................................................................
97 Chapter 3: SAS Coding ....................................................................................................... 99
Overview ............................................................................................................................................................... 99
Get Data .............................................................................................................................................................. 100
Explore Data ....................................................................................................................................................... 106
Manipulate Data
.................................................................................................................................................. 116
Export Data ......................................................................................................................................................... 126
Chapter Review ................................................................................................................................................... 134 Chapter 4: Advanced SAS Coding ..................................................................................... 135
Overview ................................................................................................
135DO Loop .............................................................................................................................................................. 135
ARRAY Statements ............................................................................................................................................. 137
SCAN Function ................................................................................................................................................... 139 FIND Function ..................................................................................................................................................... 140
iv End-to-End Data Science with SASPUT Function ..................................................................................................................................................... 141
FIRST. and LAST. Statements ........................................................................................................................... 142
Macros Overview ................................................................................................................................................ 143
Macro Variables ................................................................................................................................................. 144
Macros................................................................................................................................................................ 147
Defining and Calling Macros ............................................................................................................................... 148
Chapter Review .................................................................................................................................................. 150
Chapter 5: Create a Modeling Data Set ............................................................................ 151
Overview ............................................................................................................................................................ 151
ETL ..................................................................................................................................................................... 152
Extract ................................................................................................................................................................ 152
Data Set ............................................................................................................................................................. 155
Transform ........................................................................................................................................................... 162
Load ................................................................................................................................................................... 187
Chapter Review .................................................................................................................................................. 188
Chapter 6: Linear Regression Models .............................................................................. 189
Overview ............................................................................................................................................................ 189
Regression Structure .......................................................................................................................................... 190
Gradient Descent ............................................................................................................................................... 194
Linear Regression Assumptions ......................................................................................................................... 198
Linear Regression .............................................................................................................................................. 205
Simple Linear Regression .................................................................................................................................. 215
Multiple Linear Regression ................................................................................................................................. 222
Regularization Models ........................................................................................................................................ 228
Chapter Review .................................................................................................................................................. 235
Chapter 7: Parametric Classification Models ................................................................... 237
Overview ............................................................................................................................................................ 237
Classification Overview ...................................................................................................................................... 238
Logistic Regression ............................................................................................................................................ 240
Visualization
....................................................................................................................................................... 244
Logistic Regression Model ................................................................................................................................. 246
Linear Discriminant Analysis .............................................................................................................................. 262
Chapter Review .................................................................................................................................................. 269
Chapter 8: Non
-Parametric Models .................................................................................. 271
Overview ............................................................................................................................................................ 271
Modeling Data Set .............................................................................................................................................. 272
KNearest Neighbor Model ................................................................................................................................. 275
Tree-Based Models ............................................................................................................................................ 284
Random Forest ................................................................................................................................................... 299
Gradient Boosting ............................................................................................................................................... 310
Support Vector Machine (SVM) .......................................................................................................................... 316
Contents v
Neural Networks .................................................................................................................................................. 324
Chapter Review ................................................................................................................................................... 331
Chapter 9: Model Evaluation Metrics ............................................................................... 333
Overview ............................................................................................................................................................. 333
General Information............................................................................................................................................. 333
Model Output ....................................................................................................................................................... 337
Accuracy Statistics .............................................................................................................................................. 338
Black-Box Evaluation Tools ................................................................................................................................. 351
Chapter Review ................................................................................................................................................... 358
Index ................................................................................................................................. 359
vi End-to-End Data Science with SASAbout This Book
What Does
This Book Cover?
Hello, my name is James, and I"m an addict. I"m addicted to data science books, web courses, instructional videos, blogs, data science podcasts, predictive modeling competitions, and coding. This addiction takes up the majority of my mental energy. From the time that I wake up until I fall asleep (and all through my dreams), I"m generally thinking about data science concepts and coding. I"m going to bet that many of you are in a similar situation. If so, I"m sure that you have been as frustrated as I have been about the massive hole in the instructional data science market. The market is overrun with data science books for Python, R, and Hadoop. These books provide an overview of data science and in-depth instructions on the various machine learning models, and they provide the associated development code for those particular programming languages. Although these books are great resources for data scientists, they do not offer direct programming instruction to the most popular programming language in the business community. SAS is used by 95% of Fortune 100 companies, and these companies are the leading employers of data scientists. There is an incredible opportunity to fill the need of professional data scientists for hands-on machine learning training with real-world examples. The unfortunate reality for many SAS programmers is that we often do not have access to the latest and greatest SAS products. SAS Enterprise Miner, SAS Visual Analytics, SAS Forecast Server, and SAS Viya are all incredible products, but they are not universally available to all SAS programmers. It is essential that a data scientist who is working in a SAS environment be able to develop and implement machine learning models in any SAS environment. Even if data scientists have access to SAS Viya, it is incredibly beneficial for them to have a solid understanding of the programming code that drives the models that they develop inSAS Viya.
This book,
End -to-End Data Science in SAS®, provides all SAS programmers insight into the models, methodology, and SAS coding required to develop machine learning models in any industry . It also serves as a reference for programmers of any language who either want to expand their knowledge base or who have just been hired into a data scientist position whereSAS is the preferred language.
viii End-to-End Data Science with SAS The goal of this book is to provide clear and practical explanations of the data science environment, machine learning techniques, and the SAS code necessary for the properquotesdbs_dbs3.pdfusesText_6[PDF] sprinklr world health organization
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