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Understanding the Global Macro Symbol Table Detail •The macro processor creates the global macro symbol table at the start of a SAS session. Four... 阅读全文
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transpose基本语法Note: If output-data-set does not exist, PROC TRANSPOSE creates it by using theDATA n naming convention. Note: If you omit the VAR stat... 阅读全文
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CPU time:the amount of time the central processing unit (CPU) uses toperform requested tasks such as calculations, reading and writingdata, conditiona... 阅读全文
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SAS读取小工具 1:Column-Pointer Controls @n : move the pointer to the n column in the input buffer. +n : move the pointer forward n columns in the i... 阅读全文
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1:在程序运行中进行宏定义CALL routines that enable you to transfer information between an executing DATA step and the macro processor.You can use the SYMPUT routi... 阅读全文
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什么是视图?视图是一系列的查询语句,在使用时被执行,用来从其他的数据集或视图中获取想要的子集(subset)或者超集(superset)。The view contains only the logicfor accessing the data, not the data itself视图能用在哪... 阅读全文