Скачать или смотреть Create Multiple Rows from One Record in SAS | Data Manipulation Tips

In this tutorial, we will learn how to create multiple observations from a single record in SAS. Sometimes you might need to create multiple observations from a single record of raw data. One way to tell SAS how to read such a record is to use the other line-hold specifier, the double trailing at-sign (@@ or “double trailing @”). The double trailing @ not only prevents SAS from reading a new record into the input buffer when a new INPUT statement is encountered. It also prevents the record from being released when the program returns to the top of the DATA step. (Remember that the trailing @ does not hold a record in the input buffer across iterations of the DATA step.)

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