How to write a macro program in sas

In addition, do not use macro reserved words as a macro name.

How to write a macro program in sas

You can provide value for current month between Sep to Sep and with help of Macro Variables, we can create the programme in such a manner that we need to define them only once. At initial stage of my career, I used to write SAS codes for data conversion like text to number, number to text, adjusting width of the data type and converting report in specific layout format and others.

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. SAS Macros — Conditional and Iterative statement SAS macros provide us with the flexibility to use a piece of code multiple times by simply calling the macro.

These macro statements should always be called inside the macro. What is Conditional Processing? As the name implies, conditional processing is used when we want to execute a piece of code based on the output of single or multiple conditions.

Both syntax work in similar manner — the only difference is, first one executes only one statement after THEN or ELSE, whereas the second syntax can execute multiple statements. What are Conditional Macro Expression? I am referring to the expression in the condition as Conditional macro expression.

In some cases, it is similar to SAS expression: Here we will first define a separate macro for Daily and Monday reports you can combine these together also. Loops Loops are used to create a dynamic program, which executes for a number of iterations, based on some conditions called conditional iteration.

These statements are also valid only inside a macro. Index variable should be a macro variable. Start, Stop and Increment Value can be any macro expression that resolves to integers.

Conditional statements and loops empower SAS Macros to perform conditional and iterative tasks. They appear similar to SAS conditional statements and loops and they work similar in some cases. SAS Macros — Functions These Macro functions have similar syntax, compared to their counterpart functions in data steps and they also return results in similar manner.

They can manipulate macro variables and expressions and these functions get evaluated only at stage of Macro processing. Most importantly, these do not require quotes around character constant arguments. This function is used to convert case of letters to uppercase: This function returns the given number of characters from specified position.

Default delimiters are blank. EVAL function also returns a text result. If, we create a variable like: If you answered 6. With the help of this function, we can increase the list of functions available to the macro language significantly.

how to write a macro program in sas

It also preserves leading and trailing blanks of the string.Feb 02,  · This video series is intended to help you learn how to program using SAS for your statistical needs. This special topic lesson introduces the concept macro programming to .

Macro is a group of SAS statements that is referred by a name and to use it in program anywhere, using that name. It starts with a %MACRO statement and ends with %MEND statement.

Syntax. Hi: Generally speaking, it is a good idea to start with a working SAS program -before- you "macro-ize" the program. In the regular SAS world, without any macro code involved, this would be problematic SAS code. In a standard SAS program we would have to write out the names of all the files in the set statement.

In the macro program we will demonstrate how the program will write the names of the files in the set statement for us. In general, it is always a good idea to write a regular SAS program first, test it and then turn it into a macro program.

But with the help of SAS macros, I can write SAS macro for each specific task and call it whenever they are required. SAS Macros are typically considered as part of advance SAS Programming and are used widely in reporting, data . A SAS program is a combination of Data steps, global statements, SAS Component Language (SCL), SQL statements and SAS Macro statements.

Whenever we submit a program, it gets copied in memory (called input stack) followed by word scanner and there after it goes to compiler and gets executed.

Macro Statements: %MACRO Statement