By SAS Publishing
Elevate the modularity, flexibility, and maintainability of your SAS code with the SAS macro facility! This entire reference offers whole descriptions of macro language gains and of interfaces among the macro facility and different components of SAS software program. Chapters on debugging macros and on writing effective and conveyable macros increases your productiveness in macro programming. to use this publication, you'll have a minimum of an intermediate wisdom of base SAS programming.
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Additional info for SAS Macro Language: Reference, Version 8
For most macro programming, you do not need this level of detail. It is provided to help you understand what is going on behind the scenes. Deﬁning and Calling Macros Macros are compiled programs that you can invoke (or call) in a submitted SAS program or from a SAS command prompt. Like macro variables, you generally use macros to generate text. However, macros provide additional capabilities: 3 Macros can contain programming statements that enable you to control how and when text is generated.
The word scanner reads the first token in input stack (PROC), recognizes the beginning of a step boundary, and triggers the DATA step compiler. The compiled DATA step is executed, and the DATA step compiler is cleared. The word scanner signals the PRINT procedure (a separate executable not illustrated), which pulls the remaining tokens. 03; else bonus = 0; %end; %mend app; Input Stack print; run; Summary The previous sections illustrate the relationship between macro compilation and execution and DATA step compilation and execution.
In some cases, using indirect macro references with triple ampersands increases the efficiency of the macro processor. ” Manipulating Macro Variable Values with Macro Functions When you define macro variables, you can include macro functions in the expressions to manipulate the value of the variable before the value is stored. For example, you can use functions that scan other values, evaluate arithmetic and logical expressions, and remove the significance of special characters such as unmatched quotation marks.