When the value of the macro variable TAXRATE is CHANGE, then the macro generates the following DATA step: DATA THISYEAR; SET LASTYEAR; IF SALE > 100 THEN TAX = .05; ELSE TAX = .08; RUN; When the value of the macro variable TAXRATE is SAME, then the macro generates the following DATA step: DATA THISYEAR; SET LASTYEAR; TAX = .03; RUN; Either in a macro, directly in a SAS Data Step or in open code. Johnson Pharmaceutical Research Institute, Raritan, NJ Yong Lin, The Cancer Institute of New Jersey, New Brunswick, NJ ABSTRACT SAS base software has plenty of built-in functions. Upon completion of this tutorial, you would understand how to create macros and where they can be used.
SAS Macro code has two components: Macros and Macro variables. In the examples, I look for the data set a below.
I will show small examples of all three. MACRO FUNCTIONS Macro functions operate much as regular SAS functions, except that the arguments are within the context of the macro language. The condition was: b ERROR: Argument 2 to macro function %SUBSTR is not a number. There are dozens of ways to do this. Below, we use the symput command to put the value of xbar into a macro variable called xbarmac. Knowing SAS Macros is an advantage in the job market over other candidates. into SAS data sets •Enables you to ... ERROR: Macro function %SUBSTR has too many arguments. Using SAS Functions in Data Steps Yue Ye, The R.W.
SAS Macro programming is considered as an advanced SAS.
We would like to get the value of xbar into a macro variable to be used elsewhere. In this example page, I will demonstrate how to check if a SAS data set exists in a library or not. Components of SAS Macro Code. data step and writes a data value to a macro variable • Syntax: CALL SYMPUT(‘ macro-variable ’, data-variable); • Both arguments to symput can be expressions • IMPORTANT: You CANNOT access a macro variable within the same data step it is created ERROR: A character operand was found in the %EVAL function … Proper use of these functions can save a lot of programming time and effort. The most common is to use the Exist Function. It's generally said smart programming reduce workload and helps to win over your boss.
WHERE statement will be comparing values of DATA step variable YEAR to a macro variable value of “89” the first time, “90” the second, and so on. In a SAS program, they have referred differently as:-&Name refers to Macro Variable %Name refers to Macro; SAS Macro Variables. 3. ERROR: A character operand was found in the %EVAL function or %IF condition where a numeric operand is required. The excess arguments will be ignored. You cannot use a macro variable reference to retrieve the value of a macro variable in the same program (or step) in which SYMPUT creates that macro variable and assigns it a value. You must specify a step boundary statement to force the DATA step to execute before referencing a value in a global statement following the program (for example, a TITLE statement).