Substrn in sas

This tutorial explains how to extract last N characters or digits of a variable in SAS, along with examples, substrn in sas. Suppose you have a product ID in which last 4 characters refers to a product category so you are asked to pull product category information. In this case, it is 10 characters long.

In the example below, we are extracting first name from the full name. We are pulling first 4 characters from the variable name. Incorrect Method: As shown in the image above, the first names of the last two individuals have a length greater than 4 characters. Hence, this results in an incorrect output. The " firstname " variable extracts characters from the beginning of the name until the space. We have substracted 2 from it to set as starting position so that we can fetch last 3 characters from the variable "name".

Substrn in sas

If you do not specify length , the SUBSTRN function returns the substring that extends from the position that you specify to the end of the string. ABS Function. ADDR Function. AIRY Function. ATAN Function. ATAN2 Function. BAND Function. BETA Function. BNOT Function. BOR Function.

Suppose you want to create a new variable based on the first letter of the variable "name". MORT Function. SDF Function.

But more interestingly it has got another important use as well. When we use it on the Left side of assignment statement it can be used to replace the part of string in main string. So when used on Right side its extracting part of string and when used on left side it can used for replacing the part of string in original string. This has been demonstrated below;. SAS Code:.

Returns a substring, allowing a result with a length of zero. If string is numeric, it is converted to a character value that uses the BEST Leading and trailing blanks are removed, and no message is sent to the SAS log. If you do not specify length , the SUBSTRN function returns the substring that extends from the position that you specify to the end of the string. If you do not want the first argument to be evaluated as a macro expression, use one of the macro-quoting functions in the first argument.

Substrn in sas

It can also be used to replace very specific given characters from a string. This is the most common way to use substr function to extract characters from the string. As its name indicates, the substr function you use on the right hand side of the assignment operator. Following examples will help you to understand how sub-string in SAS works by looking at different use cases. This is the classic example of using substr function in SAS.

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If the length that you specify extends beyond the end of the string, the result is truncated at the end, so that the last character of the result is the last character of the string. TRIM Function. Hence, this results in an incorrect output. All Rights Reserved. Incorrect Method: As shown in the image above, the first names of the last two individuals have a length greater than 4 characters. CDF Laplace Distribution. Optional Argument length is an integer that specifies the length of the substring. We have substracted 2 from it to set as starting position so that we can fetch last 3 characters from the variable "name". BOR Function. If we want last 4 characters, then we would want the substr 's second argument be the fourth character's position from right to left, which is the length of the string - 3; If we want the last 5, then it should be the length - 4. Obs 1. SAS 9. For more information, see Internationalization Compatibility. This website uses cookies.

If you do not specify length , the SUBSTRN function returns the substring that extends from the position that you specify to the end of the string. ABS Function. ADDR Function.

CHAR Function. If you do not want the first argument to be evaluated as a macro expression, use one of the macro-quoting functions in the first argument. TIME Function. The Basics. CDF F Distribution. EXP Function. SINH Function. If you do not specify length , the SUBSTRN function returns the substring that extends from the position that you specify to the end of the string. VAR Function. ATAN Function.