Longitudinal Data and SAS: A Programmer's Guide

✍ Scribed by Ronald P. Cody

• Publisher: SAS Press
• Year: 2001
• Tongue: English
• Leaves: 210
• Category: Library

✦ Synopsis

This title details useful techniques for conducting operations between observations in a SAS data set. For quick reference, the book is conveniently organized to cover tools, case studies, and macros. Beginning to intermediate SAS users will appreciate this book's informative, easy-to-comprehend style.

✦ Table of Contents

Table of Contents
List of Programs
Preface
Acknowledgments
The RETAIN Statement
The LAG and DIF Functions
FIRST. and LAST. Temporary Variables
Flags and Counters
Summarizing Data Using PROC MEANS and PROC FREQ
Using PROC SQL with Longitudinal Data
Restructuring SAS Data Sets Using Arrays
Restructuring SAS Data Sets Using PROC TRANSPOSE
Study One: Operations on a Clinical Database
Study Two: Operations on Daily Weather Data and Ozone Levels
Study Three: Producing Summary Reports on a Library Data Set
Useful Macros
Appendix List of Data Files and SAS Data Sets
Index