SAS(R) 9.2 Language Reference: Concepts
SAS System Concepts
Essential Concepts of Base SAS Software- SAS Processing
- Rules for Words and Names in the SAS Language
- SAS Variables
- Missing Values
- Expressions
- Dates, Times, and Intervals
- Error Processing and Debugging
- SAS Output
- BY-Group Processing in SAS Programs
- WHERE-Expression Processing
- Definition of WHERE-Expression Processing
- Where to Use a WHERE Expression
- Syntax of WHERE Expression
- Combining Expressions by Using Logical Operators
- Improving Performance of WHERE Processing
- Processing a Segment of Data That Is Conditionally Selected
- Deciding Whether to Use a WHERE Expression or a Subsetting IF Statement
- Optimizing System Performance
- Support for Parallel Processing
- Monitoring Performance Using Application Response Measurement (ARM)
- The SAS Registry
- Printing with SAS
- Universal Printing
- Managing Printing Tasks with the Universal Printing User Interface
- Configuring Universal Printing with Programming Statements
- Forms Printing
- Using TrueType Fonts with Universal Printers and SAS/GRAPH Devices in SAS 9.2
- Creating Scalable Vector Graphics Using Universal Printing
- Creating Portable Network Graphics Using Universal Printing
- Windowing Environment Concepts
- DATA Step Concepts
- DATA Step Processing
- Reading Raw Data
- BY-Group Processing in the DATA Step
- Definitions for BY-Group Processing
- Syntax for BY-Group Processing
- Understanding BY Groups
- Invoking BY-Group Processing
- Determining Whether the Data Requires Preprocessing for BY-Group Processing
- Preprocessing Input Data for BY-Group Processing
- How the DATA Step Identifies BY Groups
- Processing BY-Groups in the DATA Step
- Reading, Combining, and Modifying SAS Data Sets
- Using DATA Step Component Objects
- Array Processing
- SAS Files Concepts
- SAS Libraries
- SAS Data Sets
- SAS Data Files
- SAS Views
- Stored Compiled DATA Step Programs
- Definition of a Stored Compiled DATA Step Program
- Uses for Stored Compiled DATA Step Programs
- Restrictions and Requirements for Stored Compiled DATA Step Programs
- How SAS Processes Stored Compiled DATA Step Programs
- Creating a Stored Compiled DATA Step Program
- Executing a Stored Compiled DATA Step Program
- Differences between Stored Compiled DATA Step Programs and DATA Step Views
- Examples of DATA Step Programs
- DICTIONARY Tables
- SAS Catalogs
- About SAS/ACCESS Software
- Processing Data Using Cross-Environment Data Access (CEDA)
- SAS 9.2 Compatibility with SAS Files from Earlier Releases
- File Protection
- SAS Engines
- SAS File Management
- External Files
- Industry Protocols Used in SAS
- Appendices
Index here
| Product | Release |
|---|---|
| Base SAS | 9.2 |
- Type
- Usage and Reference
- Copyright Date
- March 2008
- Last Updated
- 15Apr2008
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| SAS Variables |
Definition of SAS Variables
- variables
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are containers that you create within a program to store and use character and numeric values. Variables have attributes, such as name and type, that enable you to identify them and that define how they can be used.
- character variables
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are variables of type character that contain alphabetic characters, numeric digits 0 through 9, and other special characters.
- numeric variables
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are variables of type numeric that are stored as floating-point numbers, including dates and times.
- numeric precision
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refers to the degree of accuracy with which numeric variables are stored in your operating environment.
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