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详细说明： SAS base software has plenty of built-in functions. Proper use of these functions can save a lot of programming time and effort. In this paper, we will illustrate how to use some of new functions in version 6.12 and later. These new functions include data set functions, variable functions, external file functions, library and catalog functions, and some other special functions. In the paper, we will concentrate on using these functions in data steps. Quite often, we need to get the information from SAS data sets, libraries or ex ternal files in data steps. The conventional way of getting the information is that first we run several SAS procedures, then we merge the results with the SAS data set. Using SAS functions directly in data step provides a simple solution in many situations. ...展开收缩
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