How do I scan a macro in SAS?

August 30, 2020 Off By idswater

How do I scan a macro in SAS?

The %SCAN and %QSCAN functions search argument and return the nth word. A word is one or more characters separated by one or more delimiters. A delimiter is any of several characters that are used to separate words. You can specify the delimiters in the charlist and modifier arguments.

What is %put in SAS?

The %PUT statement displays text in different colors to generate messages that look like ERROR, NOTE, and WARNING messages generated by SAS. To display text in different colors, the first word in the %PUT statement must be ERROR, NOTE, or WARNING (all uppercase letters), followed immediately by a colon or a hyphen.

What does Strip do in SAS?

The STRIP function returns the argument with all leading and trailing blanks removed. If the argument is blank, STRIP returns a string with a length of zero. If the value that is trimmed is shorter than the length of the receiving variable, SAS pads the value with new trailing blanks.

What are SAS functions?

SAS : Character Functions

  • COMPBL Function. It compresses multiple blanks to a single blank.
  • STRIP Function. It removes leading and trailing spaces.
  • COMPRESS Function.
  • LEFT Function. It moves leading blanks to the end of the value.
  • TRIM Function. It removes trailing spaces.
  • TRIM(LEFT(string))
  • CAT Function.
  • SCAN Function.

Can SAS macro return value?

A SAS macro returns text that is inserted into the processing stream. Returns is absolutely an appropriate term for that. And when the text happens to be a single numeric, then it’s fine to say that it returns a value.

When do you use the scan function in SAS?

Two or more contiguous delimiters are treated as a single delimiter. When the SCAN function is used, Any character or set of characters can serve as delimiters. If n is negative, SCAN selects the word in the character string starting from the string’s end.

How does the scan function work in ASCII?

In ASCII environments that do not contain the ^ character, the SCAN function uses the ~ character instead. If you use the modifier argument without specifying any characters as delimiters, then the only delimiters that will be used are delimiters that are defined by the modifier argument.

When to use the third argument in the scan function?

When your data contains a delimiter between words not found in the default list, you can use the third argument with the SCAN function to specify your custom delimiter. For example, if the words in your character string with a plus sign (+), you need to enclose the plus sign in quotations as the third argument to the scan function.

How are macro variables padded with blanks in SAS?

In a DATA step, most variables have a fixed length. If the word returned by the SCAN function is assigned to a variable that has a fixed length greater than the length of the returned word, then the value of that variable will be padded with blanks. Macro variables have varying lengths and are not padded with blanks.