Handbook of SAS® DATA Step Programming - Li, Arthur

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Auteur(s) : Li, Arthur

Editeur : Chapman And Hall/Crc

Langue : Anglais

Parution : 01/04/2013

Format : Moyen, de 350g à 1kg

Nombre de pages : 276

Expédition : 544

Dimensions : 24.0 x 16.1 x 1.9

ISBN : 1466552387

Résumé :

This handbook shows readers how best to manage and manipulate data by using the DATA step in SAS, helping them avoid common problems when creating SAS data sets. The author explains that learning syntax does not solve all problems; rather, a thorough comprehension of SAS processing is needed for successful programming. He also guides readers through a programming task. In most of the examples, the author first presents strategies and steps for solving the problem, then offers a solution, and finally gives a more detailed explanation of the solution.

Biographie:
Arthur Li is a biostatistician at the City of Hope National Medical Center in Los Angeles County, California. He is also a part-time statistical programming instructor at the University of Southern California, where he received an MS in biostatistics. He often gives presentations and seminars on DATA step programming and statistical analysis using SAS software at SAS conferences.

Sommaire:
Introduction to SAS SAS Program and Language Reading DATA into SAS Creating and Modifying Variables Base SAS Procedures Subsetting Data by Selecting Variables Changing the Appearance of Data Creating Variables Conditionally The IF-THEN/ELSE Statement Executing One of Several Statements Modifying the IF-THEN/ELSE Statement with the Assignment Statement Understanding How the DATA Step Works DATA Step Processing Overview Retaining the Value of Newly Created Variables Conditional Processing in the DATA Step Debugging Techniques BY-Group Processing in the DATA Step Introduction to BY-Group Processing Applications Utilizing BY-Group Processing Writing Loops in the DATA Step Implicit and Explicit Loops Utilizing Loops to Create Samples Using Looping to Read a List of External Files Array Processing Introduction to Array Processing Functions and Operators Related to Array Processing Some Array Applications Applications That Use Multi-Dimensional Arrays Combining Data Sets Vertically Combining Data Sets Horizontally Combining Data Sets Data Input and Output Introduction to Reading and Writing Text Files Reading Text Files Creating Text Files Data Step Functions Introduction to Functions and CALL Routines Date and Time Functions Character Variables Functions for Converting Variable Types Useful SAS Procedures Using the SORT Procedure to Eliminate Duplicate Observations Using the COMPARE Procedure to Compare the Contents of Two Data Sets Restructuring Data Sets Using the TRANSPOSE Procedure Creating the User-Defined Format Using the FORMAT Procedure Using the OPTIONS Procedure to Modify SAS System Options References Exercises appear at the end of each chapter.