What does ampersand do in SAS?
SAS | How to read character using Ampersand(&) We can use ampersand (&) to notify SAS to read the variable until there are two or more spaces encounter as a delimiter. This technique is always useful when the variable contains two or more words.
What is an escape character SAS?
specifies the special character that identifies the inline formatting symbol. The escape-character should be one of the following rarely used characters: @ , ^ , or \ . With the ODS ESCAPECHAR statement, you can define an escape character for use with the inline formatting functions.
What does && mean in SAS?
Two ampersands
&&x&n : Two ampersands (&&) resolves to one ampersand (&) and scanner continues and then N resolves to 3 and then &x3 resolves to result.
What is Superq SAS?
The %SUPERQ function locates the macro variable named in its argument and quotes the value of that macro variable without permitting any resolution to occur. It masks all items that might require macro quoting at macro execution.
What does double ampersand mean in SAS?
We can set their values using %LET or CALL SYMPUTX. There are many automatic SAS system macro variables available to us. A macro program can contain a %DO %END loop which executes multiple times. Double ampersands resolve macro variables whose names are made up of concatenated macro variable names.
What does %macro do in SAS?
%MACRO macro-name; macro-text %MEND macro-name; SUGI 29 Tutorials Page 4 4 The %MACRO statement tells SAS that this is the beginning of the macro and the %MEND statement signals the end of the macro. Macro-name is a name you make up for your macro.
How do you escape characters with double quotes?
To cause the C compiler to interpret the double quotation mark as a character, precede the double quotation mark with the C escape character, the backslash (\). The following example illustrates the correct syntax for the query in Table 1: EXEC SQL select col1 from tab1 where col1 = ‘\”‘;
How do I remove special characters from a string in SAS?
We can remove special characters from a string variable in SAS with the help of the compress() function modifiers. We can pass “kas” as a modifier which keeps (k) the alphabetical characters (a) and spaces (s) of a string variable.
How do you write a loop in SAS?
SAS Do Loop Example:- run; data A; do i = 1 to 4; y = i**2; /* values are 2, 5, 9, 16, 25 */ output; end; run; data A; do i = 1 to 4; y = i**2; /* values are 2, 5, 9, 16, 25 */ output; end; run; The END statement marks the end of the SAS loop.
What is the difference between STR and Nrstr functions?
Using % Signs with %STR In general, if you want to mask a % sign with a macro quoting function at compilation, use %NRSTR. There is one case where you can use %STR to mask a % sign: when the % sign does not have any text following it that could be construed by the macro processor as a macro name.
What is Bquote SAS?
The %BQUOTE function treats all parentheses and quotation marks produced by resolving macro variable references or macro calls as special characters to be masked at execution time. (It does not mask parentheses or quotation marks that are in the argument at compile time.)
What are macro variables 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.
How do I resolve a macro in SAS?
These examples using text expressions show how to assign the text generated by macro LOCATE or assign the value of the macro variable NAME: x=resolve(‘%locate’); x=resolve(‘&name’); the name of a DATA step variable whose value is a text expression.
What is %local in SAS?
The %LOCAL statement creates one or more local macro variables. A macro variable created with %LOCAL has a null value until you assign it some other value. Local macro variables are variables that are available only during the execution of the macro in which they are defined.
How do you put an escape character in a quote?
You can put a backslash character followed by a quote ( \” or \’ ). This is called an escape sequence and Python will remove the backslash, and put just the quote in the string. Here is an example. The backslashes protect the quotes, but are not printed.
How do I remove special characters from data in SAS?
How do I remove a character from a variable in SAS?
set string; comp = compress(text, ”, ‘a’); run; In addition to the blank space specified in the second parameter, the ‘a’ modifier in the third parameter tells SAS to remove all of the alphabetic characters from the text.
How do you exit a loop in SAS?
The LEAVE statement in the SAS DATA step is equivalent to the “break” statement. It provides a way to immediately exit from an iterative loop. The CONTINUE statements in the SAS DATA step skips over any remaining statements in the body of a loop and starts the next iteration.