![]() ![]() When you execute the macro CREATE, it generates theseĭATA MONTH1 INFILE IN1 INPUT PRODUCT COST DATE RUN DATA MONTH2 INFILE IN2 INPUT PRODUCT COST DATE RUN DATA MONTH3 INFILE IN3 INPUT PRODUCT COST DATE RUN Ĭopyright © 2009 by SAS Institute Inc., Cary, NC, USA. This example illustrates using an iterative %DO group in a macro definition. Therefore, you cannot change it as the loop iterates.Įxample 1: Generating a Series of DATA Steps Increment is evaluated before the first iteration Index variable in each iteration of the loop. Macro expression that generates an integer to be added to the value of the Until the value of macro-variable is outside the range of integers Of macro-variable changes by the value of increment The first time the %DO group iterates, macro-variable is equal to start. Generate integers to control the number of times the portion of the macroīetween the iterative %DO and %END statements is processed. Specify integers or macro expressions that The index variable beyond the stop value when a certain condition For example, using conditional processing to set the value of You can change the value of the index variable during Specified as the index does not exist, the macro processor creates it in the Its value functions as an index thatĭetermines the number of times the %DO loop iterates. Names a macro variable or a text expression Here we are using SAS in-built data set called CARS available in the SASHELP Library.Executes a section of a macro repetitively based on the value The title will show both the current date and day without providing any values for them in the code. In the following example, we are going to use the global SAS variable SYSDATE, which represents the system date.Ĭonsider a scenario where we need to print system date every day in the title of the SAS report when the report is generated. A typical example of global Macro variable is the system date. Generally, these are system assigned variables that can be accessed by several programs. Global Macro variables can be accessed by any SAS program available in the SAS environment. These are defined below: Global Macro Variable The scope of Macro variables can be Global or Local. We can declare Macro variable at the beginning of a SAS program and called them out later in the body of the program. Macros for SAS Analytic Software COMPARECONTENTS: This macro produces a comparison listing of the variable names included in each SAS dataset from a list of. These variables contain a value that is used repeatedly by a SAS program. Data of the program is driven, i.e., SAS decides what to do based on actual data values.We can make changes in a variable at a single place, and it will reflect at multiple places.It simplifies our work by defining code ones and reusing it multiple times.In the following code, we are going to create a Macro designated by pri for the proc print statement. Whether you need to iterate over parameters in an algorithm or indices in an array, a loop is often one of the first programming constructs that a beginning programmer learns. To reduce this unnecessary length, we use Macro. Looping is essential to statistical programming. set in&name.temp After macro variable resolution, SAS sees this statement: SET INSALES.TEMP You can end any macro variable reference with a delimiter, but the delimiter is necessary only if the characters that follow can be part of a SAS name. This proc print statement will be written twice in the same program, due to that the length of the code will increase unnecessarily. The first is the delimiter for the macro reference, and the second is part of the text. To run these data sets, we need to use the proc print statement in both data sets. Let's understand Macro through an example: Value: These are the values of the variables, given to the Macro to perform operations.%MEND: It is a statement used to close Macro. ![]()
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