What is a global macro in Stata?
In Stata, a global macro is something that is stored in memory and can be used anytime during a Stata session by reference to its name (a local macro differs basically inasmuch it can be used only within a circumscribed piece of a program or a do-file).
What does global do in Stata?
The command global tells Stata to store everything in the command line in its memory until you exit Stata. If you open another data set before exiting, the global macro will still be in memory. The command local tells Stata to keep everything in the command line in memory only until the program or do-file ends.
How do I create a global macro?
You can create a read-only global macro variable and assign a specified value to it using the READONLY option in a %GLOBAL statement….Global Symbol Table
- all automatic macro variables except SYSPBUFF.
- macro variables created outside of any macro.
- macro variables created in %GLOBAL statements.
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.
What is a Stata macro?
A Stata macro is a box you put text in. You then use what’s in the box in subsequent commands. (The real trick is getting a single command to run multiple times with a different bit of text in the box each time–we’ll get there). The macros we’ll use are “local” macros.
What is Stata Varlist?
In this diagram, varlist denotes a list of variable names, command denotes a Stata command, exp denotes an algebraic expression, range denotes an observation range, weight denotes a weighting expression, and options denotes a list of options.
What is local macro?
Local macros are ephemeral macros. When you work with do-file editor, local macros are valid only in a single execution of commands in do-files or ado-files. Yet, when you work interactively, they persist until you delete them or the session is ended. Global macros are persisting macros.
Whats the difference between local vs global macro variables?
A macro variable scope is local if it is defined inside a macro and Global if it is defined outside the macro definition. CALL SYMPUT is a SAS language routine that assigns a value in a DATA step to a macro variable during execution time. It produces a global macro variable when its called inside a data step.
What is a SAS macro?
Advertisements. 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.
What are the macro variables?
Macro variables are tools that enable you to dynamically modify the text in a SAS program through symbolic substitution. You can assign large or small amounts of text to macro variables, and after that, you can use that text by simply referencing the variable that contains it.
Is Stata a coding?
Stata has two programming languages. One, known informally as “ado”, is based on Stata’s commands. You can write scripts and programs to create reproducible analyses. You can even add new features to Stata.
What does ## mean in Stata?
Stata: Data Analysis and Statistical Software You can put a # between two variables to create an interaction–indicators for each combination of the categories of the variables. You can put ## instead to specify a full factorial of the variables—main effects for each variable and an interaction.