%let mv=123; data _null_; x="&mv"; put x=; run; For example. " First we set up some system options to have a more concise output style.
These references perform symbolic substitutions when they resolve to their value. The %INDEX function searches source for the first occurrence of string and returns the position of its first character. When a macro variable contains complete SAS statements, the statements are easier to read if you enter them on separate lines with indentions for statements within a DATA or PROC step. Node 3 of 4. ... file and how it is read in. %let mv2 = %sysfunc(findw(&mv,x,,ios)) But you do need something to help the parser distinguish between whether you want the value of macro variable VARA or one named VARA_ . You can use these references anywhere in a SAS program. Learn more How do I invoke a macro variable inside the quoted string of a libname statement in SAS The simplest way to define a macro variable is to use the %LET statement to assign the macro variable a name (subject to standard SAS naming conventions), and a value. If, however, you want to see the contents of the SAS data step variable whose name is stored in &var, then use put(&var).. As such I would rewrite this: The difference between them is like a difference between cooking a meal and eating the meal. Either way macro language and data step language mostly use the same operators, just that macro language doesn't use quotation marks. The most important effect of %UNQUOTE is to restore normal tokenization of a value whose tokenization was altered by a previous macro quoting function. Ask Question Asked 2 years, 3 months ago. macro variable, %LET, INTO, CALL SYMPUT, macro parameter, %DO INTRODUCTION The macro variable, also known as a symbolic variable, is key to the use of the macro language. In particular, %NRSTR is a good choice for masking strings that contain % and & signs.
Node 2 of 4. %UNQUOTE takes effect during macro execution. A macro variable is just like a standard variable, except that its value is not a data set and has only a single character value.
Also, %stamp means a macro call which has a definition and not a variable like you've mentioned in your questions.. similarly %timestamp= .. this is syntactically wrong in SAS.. %let timestamp= does macro variable creation and %timestamp would ideally call a timestamp named macro definition..I would suggest reading the SAS Macro Language Reference. Subsequent characters can be letters, numeric digits, or underscores. Example: Locating a Character The simplest way to define a macro variable is to use the %LET statement to assign the macro variable a name (subject to standard 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. Macro variables are an efficient way of replacing text strings in SAS code.
... You'd need to provide the code (in the question please) for how you're reading it in; you could read it into a macro variable or into a data step variable. The issue lies in the difference between %put and put.. Do you want to see the contents of the macro variable &var?Then use %put(&var).. So you need to add a period before the _.
If you enjoyed this tip on how to format a macro variable in SAS, and want more like it, consider taking our SAS Macro Language 1: Essentials course and/or our SAS Macro Language 2: Advanced Techniques, offered in the classroom, as Live Web classes, or as self-paced e-Learning. In your example, you can also do this without the symput. Macro variables are just text fills. which is processed separately from and before SAS compiler executes SAS programming language code. You can use double quote characters to allow SAS to resolve the macro variable reference. The %UNQUOTE function unmasks a value so that special characters that it might contain are interpreted as macro language elements instead of as text. SAS macro variable names can be up to 32 characters in length. Understanding and Using the Macro Facility Tree level 1.
With the capability of storing up to 64k bytes of information, you could store a complete program or even the text of a novel within a single macro variable. String comparison (not equals) syntax for SAS. The macro variable needs to be a legal SAS value in the data step. AutoCall Macros Tree level 2. Node 1 of 8. These courses are part of our SAS Programming curriculum. The simplest way to define a macro variable is to use the %LET statement to assign the macro variable a name (subject to standard SAS naming conventions), and a value. Node 1 of 4.
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