SAS学习讲义SAS® Programming II: Manipulating Data with the DATA Step-经管之家官网！

SAS® Programming II: Manipulating Data with the DATA Step
Course Note
Table of Contents
Course Description...................................................................................................................... vi
Prerequisites ...............................................................................................................................vii
General Conventions .................................................................................................................viii
Chapter 1 Introduction .......................................................................................... 1-1
1.1 Overview..........................................................................................................................1-3
1.2 Review of SAS Basics .....................................................................................................1-7
1.3 Review of DATA Step Processing..................................................................................1-15
1.4 Review of Displaying SAS Data Sets............................................................................1-21
1.5 Working with Existing SAS Data Sets...........................................................................1-28
1.6 Prerequisite Syntax (Self-Study)....................................................................................1-44
1.7 Navigating the SAS Windowing Environment (Self-Study) .........................................1-47
Chapter 2 Controlling Input and Output .............................................................. 2-1
2.1 Outputting Multiple Observations ...................................................................................2-3
2.2 Writing to Multiple SAS Data Sets................................................................................2-15
2.3 Selecting Variables and Observations ............................................................................2-23
2.4 Writing to an External File.............................................................................................2-39
2.5 Solutions to Exercises....................................................................................................2-58
Chapter 3 Summarizing Data ................................................................................ 3-1
3.1 Creating an Accumulating Total Variable ........................................................................3-3
3.2 Accumulating Totals for a Group of Data......................................................................3-12
3.3 Solutions to Exercises....................................................................................................3-30
iv For Your Information
Chapter 4 Reading and Writing Different Types of Data..................................... 4-1
4.1 Reading Delimited Raw Data Files..................................................................................4-3
4.2 Controlling When a Record Loads.................................................................................4-30
4.3 Reading Hierarchical Raw Data Files............................................................................4-56
4.4 Solutions to Exercises....................................................................................................4-90
Chapter 5 Data Transformations........................................................................... 5-1
5.1 Introduction......................................................................................................................5-3
5.2 Manipulating Character Values........................................................................................5-8
5.3 Manipulating Numeric Values .......................................................................................5-39
5.4 Manipulating Numeric Values Based on Dates..............................................................5-48
5.5 Converting Variable Type ..............................................................................................5-53
5.6 Solutions to Exercises....................................................................................................5-71
Chapter 6 Debugging Techniques (Self-Study)................................................... 6-1
6.1 Using the PUT Statement.................................................................................................6-3
6.2 Using the DEBUG Option .............................................................................................6-14
Chapter 7 Processing Data Iteratively.................................................................. 7-1
7.1 DO Loop Processing........................................................................................................7-3
7.2 SAS Array Processing....................................................................................................7-27
7.3 Using SAS Arrays..........................................................................................................7-38
7.4 Solutions to Exercises....................................................................................................7-53
Chapter 8 Combining SAS® Data Sets ................................................................. 8-1
8.1 Match-Merging Two or More SAS Data Sets..................................................................8-3
8.2 Simple Joins Using the SQL Procedure (Self-Study) ....................................................8-19
For Your Information v
8.3 Solutions to Exercises....................................................................................................8-31
Chapter 9 Learning More....................................................................................... 9-1
9.1 Where Do I Go From Here?.............................................................................................9-3