- 1 How do I assign a macro to a variable?
- 2 How can I write a macro which takes a variable number of arguments?
- 3 How do you create a macro variable in DATA step?
- 4 How do you use macro variables?
- 5 How would you identify a macro variable?
- 6 What symbol is used to define a macro variable?
- 7 Can we pass arguments in macro definition?
- 8 How many arguments macro can have?
- 9 How do I create a local macro variable in SAS?
- 10 What is _N_ in SAS?
- 11 How do you define a variable in a VBA macro?
- 12 Which of the following is macro variable?
- 13 What is global macro variable?
- 14 What is SAS macro variable?
- 15 What is a type in VBA?
- 16 Do loop in SAS macro?
How do I assign a macro to a variable?
(Macro language statements always start with a %). This statement works much like an assignment statement in the DATA step. The %LET statement is followed by the macro variable name, an equal sign (=), and then the text value to be assigned to the macro variable.
How can I write a macro which takes a variable number of arguments?
To support variable length arguments in macro, we must include ellipses (…) in macro definition. There is also “__VA_ARGS__” preprocessing identifier which takes care of variable length argument substitutions which are provided to macro.
How do you create a macro variable in DATA step?
myvar = SYMGET(charvar); Using SYMGET in this way assumes that the value of the character variable CHARVAR is the name of a macro variable at each iteration of the DATA step. This statement then assigns the value of those macro variables to the DATA step variable MYVAR for each loop through the DATA step.
How do you use macro variables?
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.
How would you identify a macro variable?
You can define a macro variable within a macro, and you can also explicitly define it as a global variable, by defining it with the %GLOBAL statement. Macro variable names must start with a letter or an underscore and can be followed by letters or digits.
What symbol is used to define a macro variable?
When a macro variable is defined within a macro and is not explicitly defined as global, the variable is typically held in the macro’s local symbol table, which SAS creates when the macro starts executing.
Can we pass arguments in macro definition?
Function-like macros can take arguments, just like true functions. The number of arguments you give must match the number of parameters in the macro definition. When the macro is expanded, each use of a parameter in its body is replaced by the tokens of the corresponding argument.
How many arguments macro can have?
For portability, you should not have more than 31 parameters for a macro. The parameter list may end with an ellipsis (…).
How do I create a local macro variable in SAS?
Local macro variables are variables that are available only during the execution of the macro in which they are defined. Use the %LOCAL statement to ensure that macro variables created earlier in a program are not inadvertently changed by values assigned to variables with the same name in the current macro.
What is _N_ in SAS?
Each time the DATA step loops past the DATA statement, the variable _N_ increments by 1. The value of _N_ represents the number of times the DATA step has iterated. You can use the value of this variable to help locate errors in data records and to print an error message to the SAS log .
How do you define a variable in a VBA macro?
You can implicitly declare a variable in Visual Basic simply by using it in an assignment statement. All variables that are implicitly declared are of type Variant. Variables of type Variant require more memory resources than most other variables.
Which of the following is macro variable?
Macro variables are the aggregate quantities that change from time to time. The major macroeconomic variables are aggregate price, aggregate demand, aggregate supply, inflation and unemployment.
What is global macro variable?
Global macro variables are variables that are available during the entire execution of the SAS session or job. A macro variable created with a %GLOBAL statement has a null value until you assign it some other value. If a global macro variable already exists and you specify that variable in a %GLOBAL statement, the existing value remains unchanged.
What is SAS macro variable?
Macro Variables. A macro variable in SAS is a string variable that allows you to dynamically modify the text in a SAS program through symbolic substitution. The following example demonstrates how to create and use a macro variable. First we set up some system options to have a more concise output style.
What is a type in VBA?
A Type in VBA is a custom data type that can be defined. It can only contain variables, not functions nor procedures. Types consist of multiple associated variables (like Classes), while an Enum is simply a numeric value that represents one of it’s possible items.
Do loop in SAS macro?
Syntactically speaking, while SAS programming loops or do-loops always reside within SAS data step , SAS macro loops or %do-loops are located within SAS macros. They can be either within a data step (or proc step) generating multiple data/proc step statements, or outside data/proc step generating multiple data/proc steps or global statements.