Longitudinal Data And SAS: A Programmer's Guide
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| Google books | books.google.com |
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| Originally published | October 15, 2001 |
| Authors | Ron Cody |
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| Date of Upd. | |
| ID | 2300683 |
About Longitudinal Data And SAS: A Programmer's Guide
Working with longitudinal data introduces a unique set of challenges. Once you've mastered the art of performing calculations within a single observation of a data set, you're faced with the task of performing calculations or making comparisons between observations. . . .