SAS® Certification Prep Guide: Base Programming for SAS®9

Chapter 11. Creating and Managing Variables

Overview	296
Introduction	296
Objectives	296
Creating and Modifying Variables	297
Accumulating Totals	297
Initializing Accumulator Variables	298
Assigning Values Conditionally	300
Comparison and Logical Operators	301
Providing an Alternative Action	303
Specifying Lengths for Variables	304
Subsetting Data	307
Deleting Unwanted Observations	307
Selecting Variables with the DROP= and KEEP= Data Set Options	308
Assigning Permanent Labels and Formats	311
Assigning Values Conditionally Using SELECT Groups	312
Specifying SELECT Statements with Expressions	315
Specifying SELECT Statements without Expressions	315
Grouping Statements Using DO Groups	316
Summary	319
Text Summary	319
Points to Remember	320
Practice	320
Quiz	321

Overview

Introduction

You’ve learned ...