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Matches any character that is not a white space character and is equivalent to [^\f\n\r\t\v]. matches a tab character and is equivalent to "\x09". matches any word character including the underscore and is equivalent to [A-Za-z0-9_]. matches any non-word character and is equivalent to [^A-Za-z0-9_]. matches num, where num is a positive integer. )\1" matches two consecutive identical characters. Example 1: Validating Data You can test for a pattern of characters within a string. For example, you can examine a string to determine whether it contains a correctly formatted telephone number.

Using Functions to Manipulate Files SAS manipulates files in different ways, depending on whether you use functions or statements. If you use functions such as FOPEN, FGET, and FCLOSE, you have more opportunity to examine and manipulate your data than when you use statements such as INFILE, INPUT, and PUT. When you use external files, the FOPEN function allocates a buffer called the File Data Buffer (FDB) and opens the external file for reading or updating. The FREAD function reads a record from the external file and copies the data into the FDB.

Some situations where data might commonly be transcoded are: ♦ when you share data between two different SAS sessions that are running in different locales or in different operating environments, ♦ when you perform text-string operations, such as converting to uppercase or lowercase, ♦ when you display or print characters from another language, ♦ when you copy and paste data between SAS sessions running in different locales. For more information on SAS features designed to handle data conversions from different encodings or operating environments, see SAS National Language Support (NLS): User's Guide.

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