How do you create a macro variable in DATA step?
How do you create a macro variable in DATA step?
You can convert data step variables into macro variables with a few lines of code using the %SYSCALL SET routine….SAS provides a number of different options for creating macro variables.
- %LET statement for creating a single macro variable.
- CALL SYMPUT – To create many macro variables.
- PROC SQL.
- CALL SET.
Can you use where in a DATA step SAS?
The WHERE statement can only be used in DATA steps that use existing SAS data set(s) as input, i.e., a SET, MERGE, or UPDATE statement must exist. If you are using an INPUT statement to read in “raw” files, then you cannot use WHERE. A single WHERE statement can apply to multiple data sets.
What does Sysfunc do in SAS?
%SYSFUNC allows us to convert a macro variable using a format without having to resort to a data step. This example converts a macro variable date string into a macro variable containing the SAS date representation using an existing SAS format.
How do I create a macro variable in SAS?
The simplest way to assign a value to a macro variable is to use the macro program statement %LET: %let dsname=Newdata; DSNAME is the name of the macro variable. Newdata is the value of the macro variable DSNAME.
What is a macro variable in SAS?
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 macro function in SAS?
While DATA step functions are applied to values on the Program Data Vector, PDV, macro functions are used to create, modify, and work with text strings. Initially this may seem like a minor difference, but because macro functions deal with text, they can be used to build SAS code.
How many ways can you create macros in SAS?
Knowing how to create and use macro variables is the first step in learning the SAS Macro Language. 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.
What are macro functions in SAS?
data out. MON; /* macro function */ set in. weekly (keep=name code sales); length location $4; location=substr(code,1,4); /* SAS function */ run; Suppose that the IN….Macro Character Functions.
| Function | Description |
|---|---|
| %LENGTH | Returns the length of a string. |
What is PUTN function in SAS?
Enables you to specify a numeric format at run time.
What is macro in SAS?
SAS – Macros. SAS has a powerful programming feature called Macros which allows us to avoid repetitive sections of code and to use them again and again when needed. It also helps create dynamic variables within the code that can take different values for different run instances of the same code.
How do I merge data in SAS?
To merge two or more data sets in SAS, you must first sort both data sets by a shared variable upon which the merging will be based, and then use the MERGE statement in your DATA statement.
What is SAS syntax?
SAS syntax is the set of rules that dictate how your program must be written in order for SAS to understand it. There are some conventions of SAS syntax that new users should know before getting started.
What is SAS macro program?
SAS Macros are typically considered as part of advance SAS Programming and are used widely in reporting, data manipulation and automation of SAS programs. They do not help to reduce the time of execution, but instead, they reduce repetition of similar steps in your program and enhance the readability of Programs.