We create a simple macro array using the distinct values of the variable Origin from the Sashelp.Cars table: Output 3. Both the %LOCAL statement and the %GLOBAL statement create macro variables with a specific scope. SAS macros are not like functions in most programming languages: they don't return values, they are actually replaced by the content of the macro. You can use %LET to create a macro variable containing a character string. %GLOBAL statements that use the READONLY option create a new global macro variable …
These references perform symbolic substitutions when they resolve to their value.
The local variables are decalred with below syntax.
Use the %DO statement to loop through the number of variables within the SAS data set. Global macro variables are variables that are available during the entire execution of the SAS session or job. DICTIONARY.MACROS is a metadata table with one row per macro variable. The example below would fail because the macro variables val1-val3 are local to the macro TEST and only exist within the TEST macro. Sources of SAS macro functions. Once TEST has finished executing those macro variables …
However, the %LOCAL statement creates local macro variables that exist only during the execution of the macro that contains the variable, and the %GLOBAL statement creates global macro variables that exist for the duration of the session or job. Can you give me some idea how to do it. You can use CALL SYMPUT if you want to store the value of a given variable rather than a character string. SAS documentation says: When the macro processor executes a macro program statement that can create a macro variable, the macro processor creates the variable in the local symbol table if no macro variable with the same name is available to it Don’t forget to check – SAS String Functions or Character Functions. These can be processed as shown in a later example. A macro variable created with a %GLOBAL statement has a null value until you assign it some other value. I tried to name them &&cont4_&&var&i for example. As a simple example, I have a variable, xx=5 and I want to generate yy that yy=1/xx=.2. SAS Macro variables are referenced by using an ampersand (&) followed by a macro variable name. You can use Pre-built macro functions. The local variables are decalred with below syntax. Here is a complete list of the pre-built SAS macro functions. However I can not use call symput as this is only used in datastep, and I am unaware how(if) a %let command can have dynamicf (changing) variable name. Pre-built macro functions that are part of the macro processor. When the macro processor executes a macro program statement that can create a macro variable (such as a %LET statement), the macro processor attempts to change the value of an existing macro variable rather than create a new macro variable. %do i = 1 %to &cnt; Create the macro variable named &X that uses the VARNAME function to return the name of a SAS data set variable. The %GLOBAL and %LOCAL statements are exceptions. The solution is to make your macro variable global, outside the macro. To create a macro variable, use ideas from the articles about concatenating a vector of values into to a string and about using the SYMPUTX subroutine. With this my macro variables cont4_&&var&i cont8_&&var&i cont9_&&var&i are costantly overwrited...and they become unuseful outside of their loop. In practice inside of the loop the macro are created, but I don't know how to call them when I need outside. The SQL step populates the local macro variable, VARS, with the names of all user-defined global macro variables, except those with SYS_SQL_IP_ in their names.
Creating a Vertical Macro Variable Array . I would like create a series of global variable from inside a macro, the variable name needs to be change according to its contents. A macro variable array is where there are macro variables that are similarly named, such as Var1, Var2, Var3, and so on.