Question: What Is A Macro Variable In SAS?

What is a macro in SAS?

Macros are simply a group of SAS statements that have a name.

%MACRO macro-name; macro-text %MEND macro-name; SUGI 29 Tutorials Page 4 4 The %MACRO statement tells SAS that this is the beginning of the macro and the %MEND statement signals the end of the macro.

Macro-name is a name you make up for your macro..

What are SAS variables?

Variable names are just that: they are a name used to refer to a variable in a dataset. When naming a variable in SAS, there are a few rules you must follow: The name cannot contain more than 32 characters.

How do I mask a macro in SAS?

In general, if you want to mask a % sign with a macro quoting function at compilation, use %NRSTR. There is one case where you can use %STR to mask a % sign: when the % sign does not have any text following it that could be construed by the macro processor as a macro name. The % sign must be marked by another % sign.

What are the macro variables?

Macro variables are tools that enable you to dynamically modify the text in a SAS program through symbolic substitution. … Macro variable values have a maximum length of 65,534 characters. The length of a macro variable is determined by the text assigned to it instead of a specific length declaration.

What is macro example?

A macro is like an algorithm or a set of actions that we can use or run multiple times. A macro helps in automating or repeating tasks by recording or storing our input sequences like mouse strokes or keyboard presses. Once this input is stored, it makes up a macro which is open to any possible changes.

What is macro and its uses?

A macro is an automated input sequence that imitates keystrokes or mouse actions. A macro is typically used to replace a repetitive series of keyboard and mouse actions and used often in spreadsheets and word processing applications like MS Excel and MS Word.

How do you use macro variables in SAS?

After 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. These references perform symbolic substitutions when they resolve to their value. You can use these references anywhere in a SAS program.

What is a macro call?

4.12 Macro Calls. A macro call consists of a name optionally followed by an actual parameter list. The number of parameters in the actual parameter list must be the same as the number of formal parameters specified in the definition of the macro.

What are functions in SAS?

SAS has a wide variety of in built functions which help in analysing and processing the data. These functions are used as part of the DATA statements. They take the data variables as arguments and return the result which is stored into another variable.

How do you set a variable in SAS?

In a DATA step, you can create a new variable and assign it a value by using it for the first time on the left side of an assignment statement. … When you read raw data in SAS by using an INPUT statement, you define variables based on positions in the raw data.More items…

How do you set variables in SAS?

Ways to Create VariablesOverview.Create a New Variable Using the LENGTH Statement.Create a New Variable Using the ATTRIB Statement.Create a New Variable Using an Assignment Statement.Reading Data with the INPUT Statement in a DATA Step. … Create a New Variable Using the FORMAT or INFORMAT Statements.Using the IN= Data Set Option.

How many ways can you create macro variables in SAS?

One of the primary techniques is through the %LET statement. Other ways of creating macro variables includes the use of the iterative %DO loop, macro parameters, the SQL INTO: clause, and the DATA step SYMPUT routine.

How do you call a Symput in SAS?

call symput(‘a’,a); call symput(‘b’,b); run; Use this form when macro-variable is also the name of a SAS variable or a character expression that contains a SAS variable….a string enclosed in quotation marks.It can be the name of a numeric or character variable. … a DATA step expression.

What is a categorical variable in SAS?

Variables which record a response as a set of categories are termed categorical. Such variables fall into three classifications: Nominal, Ordinal, and Interval. Nominal variables have categories that have no natural order to them.

What is macro instruction arguments?

A macro instruction is a request to the assembler program to process a predefined sequence of instructions called a macro definition. From this definition, the assembler generates machine and assembler instructions, which it then processes as if they were part of the original input in the source module.