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How do I extract numbers from a string in SAS?

Table of Contents

  • How do I extract numbers from a string in SAS?
  • How do I get the length of a string in SAS?
  • How do you extract the first few characters in SAS?
  • What happens if you omit length in SAS data step?
  • What is the default length of an undeclared variable in SAS?
  • How do you replace a variable with a string in SAS?

How do I extract numbers from a string in SAS?

I would use the regular expression function built in to SAS. Start by reading in the whole line as a character variable, and then use prxmatch or one of the other regular expression functions to extract just the numeric component using the \d wildcard.

How do I get the length of a string in SAS?

A well known function in SAS is the LENGTH function – used to return the length of a character string. The function will return an integer which represents the position of the last (on the right) character in the string. Trailing blanks will be ignored.

How do you extract the first few characters in SAS?

Substring in SAS is accomplished by using SUBSTR() Function. SUBSTR() Function takes up the column name as argument and calculates the substring.

How do you give length in SAS?

This example uses a LENGTH statement to set the length of the character variable NAME to 25 bytes. The LENGTH statement also changes the default number of bytes that SAS uses to store the values of newly created numeric variables from 8 to 4 bytes….Example

  1. a comma (,)
  2. a blank space.
  3. the value of FIRSTNAME.

What is a substring function in SAS?

SUBSTR (right of =) Function. Extracts a substring from an argument. specifies a valid SAS variable name. specifies a character constant, variable, or expression. specifies a numeric constant, variable, or expression that is the beginning character position.

What happens if you omit length in SAS data step?

If you omit length, SAS extracts the remainder of the expression. Details. In a DATA step, if the SUBSTR (right of =) function returns a value to a variable that has not previously been assigned a length, then that variable is given the length of the first argument. The SUBSTR function returns a portion of an expression that you specify in string.

What is the default length of an undeclared variable in SAS?

If you use an undeclared variable, it will be assigned a default length of 8 when the SUBSTR function is compiled. When you use the SUBSTR function on the left side of an assignment statement, SAS replaces the value of variable with the expression on the right side. SUBSTR replaces length characters starting at the character

How do you replace a variable with a string in SAS?

If you omit length, SAS uses all of the characters on the right side of the assignment statement to replace the values of variable. specifies a character constant, variable, or expression that will replace the contents of variable. Enclose a literal string of characters in quotation marks.

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