2007-11-20

The default length of numeric variables in SAS data sets is 8 bytes. 8 bytes doesn’t mean only 8 digits as most people get confused here. It means you can store up to 16 digits in the variable. The minimum length of the numeric variable in SAS is 3 bytes which can be used to store values up to 8192.

This example uses a LENGTH statement to set the length of the character variable NAME to 25. It also changes the default number of bytes that SAS uses to store the values of newly created numeric variables from 8 to 4. The LENGTH statement determines the length of a character variable in both the program data vector and the data set that are being created. (In contrast, a LENGTH statement determines the length of a numeric variable only in the data set that is being created.) The maximum length of any character value in SAS is 32,767 bytes. 2017-03-28 · Also note that our numeric variables representing dates (dob, start_date and end_date) are of different lengths: they are length 8 in STUDY2016 and length 4 in STUDY2017. Let’s make them the same length as well. From the standpoint of numerical accuracy in SAS for the dates, a length of 4 seems to be quite adequate to represent them accurately.

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The maximum number depends on your environment and the file's attributes. For example, the maximum number of variables depends on the total length of all the variables and cannot exceed the maximum page size. In SAS, the length of a variable is the number of bytes SAS allocates for storing the variable. It is not necessarily the same as the number of characters in the variable. sas variable name length is 32 character,however sas says that character variables can be up to 32,767 bytes long.it is confusing for me.character length is 32 or 32,767? I appreciate if anyone enlighten me. 0 Likes 1 ACCEPTED SOLUTION SAS Variable Length The “length” of a SAS variable corresponds to the number of bytes for storing variables.

2019-03-09

sas documentation: Variable Length. Parameter Details; variable(s) variable(s) you wish to assign a length to $ optional parameter that specifies if your variable is a character variable 2020-08-07 If the value of a variable becomes large or has many significant digits, you may lose precision when saving the results of arithmetic calculations if the length of a variable is less than 8 bytes. The maximum number of variables in a single SAS data set under Windows is 32,767.

Sas global forum 2008 posters paper 244-2008 text and data mining to investigate expenditures on prescribed medicines The way to approach this purpose is 

Variables that are dropped from the output data set are also included.

The minimum length of the numeric variable in SAS is 3 bytes which can be used to store values up to 8192. 2007-11-20 · Length: The column length, in SAS terms, is the amount of storage allocated in the data set to hold the column values. The length is specified in bytes. For numeric columns, the valid lengths are usually 3 through 8. The longer the length, the greater the precision allowed within the column values. The default length of numeric variables in SAS data sets is 8 bytes. (You can control the length of SAS numeric variables with the LENGTH or ATTRIB statements in the DATA step.) The issue of numeric precision affects the return values of almost all SAS math functions and many numeric values returned from SAS procedures.
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The ATTRIB statement can assign the length as well as other attributes of variables. Examples. This example uses a LENGTH statement to set the length of the character variable NAME to 25.

Numeric  vtable to identify the numeric and character variables and their length. STEP 1 – INITIALIZE THE PROGRAM.
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sas variable-length  Share. Improve this question. Follow asked May 1 '14 at 15:26. kksf kksf. 55 1 1 gold badge 1 1 silver badge 10 10 bronze badges. Add a comment | 2 Answers Active Oldest Votes. 4. Assuming your ID is character, and you don't consider blanks digits: if lengthn(id) ~= 4 then

For numeric variables, 8 bytes is enough to save integers up to 16 digits. As you can see, the default length in bytes that SAS reserves for numeric variables allow you to save very big integers. According to the SAS documentation, length refers to the number of bytes used to store each of the variable's values in a SAS data set. You can use a LENGTH statement to set the length of both numeric and character variables. Also note that our numeric variables representing dates (dob, start_date and end_date) are of different lengths: they are length 8 in STUDY2016 and length 4 in STUDY2017. Let’s make them the same length as well. From the standpoint of numerical accuracy in SAS for the dates, a length of 4 seems to be quite adequate to represent them accurately.