By Michele Burlew
Need assistance realizing the SAS macro facility? you'll find the entire solutions that you just want during this easy-to-follow publication! Michele Burlew places her many years of macro programming adventure to give you the results you want as she courses you thru the fundamentals, in addition to the extra advanced positive aspects of the SAS macro facility, in SAS Macro Programming Made effortless, moment variation. up to date largely for SAS nine, this ebook comprises lots of examples and step by step directions. you are going to research the weather of the macro facility (macro variables, macro courses, macro language), the way to write a macro application, macro programming concepts, pointers on utilizing the macro facility, how the macro facility matches into SAS, and in regards to the interfaces among the macro facility and different elements of SAS. New subject matters for the second one variation comprise utilizing SAS nine macro and SAS language beneficial properties, debugging macro courses, including errors checking to macro courses, and development a library of application macro courses. starting macro programmers will discover ways to write SAS macro courses fast and successfully. more matured macro programmers will locate this e-book priceless to refresh their conceptual wisdom and extend on their macro programming abilities. it's also vital to notice that the macro facility is a hugely renowned a part of SAS and located within the activity specifications for lots of SAS programming jobs. additionally, macro facility innovations are validated at the SAS complicated Programming examination. The ebook assumes a few SAS programming adventure, together with wisdom of ways to jot down an information step and the way to take advantage of SAS systems.
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Extra info for SAS Macro Programming Made Easy, Second Edition
4 illustrates this process. 2. This program now contains one macro language statement and one macro variable reference. The %LET macro language statement assigns a value to a macro variable. The %LET statement tells the macro processor to store the macro variable name and its associated text in the macro symbol table. The macro variable is placed in the DATA step where the text associated with the macro variable should be substituted. The ampersand token followed by a name token is the instruction to the macro processor to look in the macro symbol table for the text associated with the macro variable whose name follows the ampersand.
The first PROC MEANS step runs daily. The second PROC MEANS step runs only on Fridays. The conditional macro language statements direct the macro processor to run the second PROC step only on Fridays. Assume the program was run on Friday, August 17, 2007. Macro language statements start with percent signs, and macro variable references start with ampersands. 5. 6: Iterative Processing of SAS Steps Coding each iteration of a programming process that contains multiple iterations is a lengthy task.
There are two types of macro variables: automatic macro variables and userdefined macro variables. Automatic macro variables are defined by SAS each time a SAS session is started, and they remain available for you to use throughout your SAS session. Most automatic macro variables contain information about your SAS session such as time of day that the session was invoked, version of SAS, and the operating system you’re using. Most automatic macro variable values remain constant throughout your SAS session and most cannot be modified by you.