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. Read values into a "macro list" from a SAS/IML vector. 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 SAS macro functions may come from the following three sources. Then you don't need to assign it to a new macro variable with %let. &
You can use Sources of SAS macro functions. %GLOBAL statements that use the READONLY option create a new global macro variable … In practice inside of the loop the macro are created, but I don't know how to call them when I need outside. % LET (Macro Variable Name) = Value; Here the Value field can take any numeric, text or date value as required by the program. 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. 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. We create a simple macro array using the distinct values of the variable Origin from the Sashelp.Cars table: Output 3. Can you give me some idea how to do it. A macro variable array is where there are macro variables that are similarly named, such as Var1, Var2, Var3, and so on. SAS Macro variables are referenced by using an ampersand (&) followed by a macro variable name. The variables are used by the SAS statements using the & character appended at the beginning of the variable name. a macro variable is created, you typically use the variable by referencing it with an ampersand preceding its name (&variable-name), which is called a macro variable reference. Don’t forget to check – SAS String Functions or Character Functions.
The example below would fail because the macro variables val1-val3 are local to the macro TEST and only exist within the TEST macro. But clearly SAS doesn't solve the macro. The %GLOBAL and %LOCAL statements are exceptions. 2. The %let statement inside the %macro should have impacted ONLY the local symbol table. Both variables are macro variables. Global macro variables are variables that are available during the entire execution of the SAS session or job. The local variables are decalred with below syntax. Both the %LOCAL statement and the %GLOBAL statement create macro variables with a specific scope. I would like create a series of global variable from inside a macro, the variable name needs to be change according to its contents. If a global macro variable already exists and you specify that variable in a %GLOBAL statement, the existing value remains unchanged.
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.
Pre-built macro functions. We can also declare multiple macro variables and use them at different places in SAS Code. Here is a complete list of the pre-built SAS macro functions. The %LOCAL statement creates the local macro variable, VARS, with a null value. These are such macro functions as %eval, %length, %quote, %scan, %str, %sysfunc, %upcase, etc. I tried to name them &&cont4_&&var&i for example. Example. Once TEST has finished executing those macro variables … 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. These references perform symbolic substitutions when they resolve to their value. % LET (Macro Variable Name) = Value; Here the Value field can take any numeric, text or date value as required by the program. 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. The solution is to make your macro variable global, outside the macro.
As a simple example, I have a variable, xx=5 and I want to generate yy that yy=1/xx=.2. Suppose you are inside a macro and want to create a macro variable for each observation from a data set. CREATING MACRO VARIABLES VIA PROC SQL Mike S. Zdeb, New York State Department of Health INTRODUCTION There are a number of ways to create macro variables. 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. The local variables are decalred with below syntax.
Example. You can use a similar technique to create a macro variable that contains values that are in a SAS/IML vector. DICTIONARY.MACROS is a metadata table with one row per macro variable.