| Functions and CALL Routines |
Extracts a substring from an argument.
| Category: |
Character
|
| Restriction: |
I18N Level 0
|
| Tip: |
DBCS equivalent functions are KSUBSTR and
KSUBSTRB in
SAS National Language Support (NLS): Reference Guide.
|
|
<variable=>SUBSTR(string,
position<,length>)
|
-
variable
-
specifies a valid SAS variable name.
-
string
-
specifies a character constant, variable,
or expression.
-
position
-
specifies a numeric constant, variable,
or expression that is the beginning character position.
-
length
-
specifies a numeric constant, variable,
or expression that is the length of the substring to extract.
| Interaction: |
If length is zero, a negative value, or larger than the length
of the expression that remains in string after position, SAS extracts the remainder of the expression. SAS
also sets _ERROR_ to 1 and prints a note to the log indicating that the length argument is invalid. |
| Tip: |
If you omit length, SAS extracts the remainder of the
expression. |
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. The portion begins
with the character that you specify by position,
and is the number of characters that you specify in length.
|
SAS Statements |
Results |
|
----+----1----+----2
|
date='06MAY98';
month=substr(date,3,3);
year=substr(date,6,2);
put @1 month @5 year;
|
MAY 98
|
Copyright © 2011 by SAS Institute Inc., Cary, NC, USA. All rights reserved.
